Switching on a PC over the telephone line

[Jasen Betts]

On 2011-09-14, Rich Grise <richg@example.net.invalid> wrote:

Where are these kids coming from? There's been wake-on-ring for freaking
DECADES!!!

http://en.wikipedia.org/wiki/Wake-on-ring

Now there's an idea.

AIUI he deosn't want the computer to power on every time someone calls.
else he could just use a $5 second-hand modem.

But with the relay he's got and a voltage source he copuld provide a
ring-like signal (+3 to 15V) on pin 9 of a serial port and select wake on
ring in the bios setup. You don't even need to open the case.

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---

 

[Rich Grise]

krw@att.bizzzzzzzzzzzz wrote:

On Wed, 14 Sep 2011 11:45:15 -0700, Rich Grise <richg@example.net.invalid
wrote:

krw@att.bizzzzzzzzzzzz wrote:
On Wed, 14 Sep 2011 11:52:21 GMT, N0Spam@daqarta.com (Bob Masta) wrote:

"Back in the day" it was common to use the switch on the
plug strip to turn on the computer, monitor, printer, etc
all at once. Now, it seems the computer's power button must
be pushed. But I wonder if it's possible to make the
computer revert to the old ways...something in the BIOS or
APM system, possibly? It seems like this would be an easy
thing for the manufacturer to have provided; maybe they did?

Yes, that function (boot on power restore, or similar) is often an
option in BIOS.

Where are these kids coming from? There's been wake-on-ring for freaking
DECADES!!!

Ring? Isn't that something grandpa's old *telephones* did? Everyone
knows
you can't connect a computer to a telephone! One takes a six-pin
connector and the other eight!

http://en.wikipedia.org/wiki/Wake-on-ring

Is it just that modern technology has gone so far out there that you'd
have to do computer hacker/technology archaeology to find something that
actually accomplishes the same thing as they did back then, as simply as
they did back then?

You mean like wakeup-on-LAN? ;-)

...or how about a switch?

Well, kinda like that, yeah. But I believe there are still household
telephones that ring, and that _was_ the OP's question. (OK, not so much
"ring" as "over the telephone line.") And he might have been talking cold
start, like the big ol' red switch on the old PC, not waking one up from
standby.

But only the OP knows the answer to that.

Thanks,
Rich

 

[nikos]

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net>
wrote:

nikos wrote:

On Sep 11, 12:15Â pm, Jasen Betts <ja...@xnet.co.nz> wrote:
On 2011-09-10, Tom Biasi <tombi...@optonline.net> wrote:

Does a modern cell phone respect DTMF anymore?

yes they send them so that users can interact with DTMF controlled
services like PABXs, banks, and answerphones.

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to n...@netfront.net ---

By the way, following my initial request, I have installed a security
system (Paradox SP 7000) that is able to receive dial tones. This
security system provides 4 PGMs (Programmable Modules) that are
actually 4 relays. Each relay can be controlled through the dial tones
over the phone line.
The thing is that when I close the relay, it remains closed and I need
about 2-3 seconds in order to open it (through the dial tones). If I
connect the relay to a PC switch button then the computer switches on
and off because the 2-3 seconds duration is long.
So I need an extra circuit with maybe a new intermediary relay,
between the PGM relay and the PC switch button in order to force it
open after 500 millisecs of the activation time.
Does anybody have an idea on this ?

   A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

Thank you
Nick

 

[krw@att.bizzzzzzzzzzzz]

On Thu, 15 Sep 2011 13:23:59 -0700, Rich Grise <richg@example.net.invalid>
wrote:

krw@att.bizzzzzzzzzzzz wrote:

On Wed, 14 Sep 2011 11:45:15 -0700, Rich Grise <richg@example.net.invalid
wrote:

krw@att.bizzzzzzzzzzzz wrote:
On Wed, 14 Sep 2011 11:52:21 GMT, N0Spam@daqarta.com (Bob Masta) wrote:

"Back in the day" it was common to use the switch on the
plug strip to turn on the computer, monitor, printer, etc
all at once. Now, it seems the computer's power button must
be pushed. But I wonder if it's possible to make the
computer revert to the old ways...something in the BIOS or
APM system, possibly? It seems like this would be an easy
thing for the manufacturer to have provided; maybe they did?

Yes, that function (boot on power restore, or similar) is often an
option in BIOS.

Where are these kids coming from? There's been wake-on-ring for freaking
DECADES!!!

Ring? Isn't that something grandpa's old *telephones* did? Everyone
knows
you can't connect a computer to a telephone! One takes a six-pin
connector and the other eight!

http://en.wikipedia.org/wiki/Wake-on-ring

Is it just that modern technology has gone so far out there that you'd
have to do computer hacker/technology archaeology to find something that
actually accomplishes the same thing as they did back then, as simply as
they did back then?

You mean like wakeup-on-LAN? ;-)

...or how about a switch?

Well, kinda like that, yeah. But I believe there are still household
telephones that ring, and that _was_ the OP's question. (OK, not so much
"ring" as "over the telephone line.") And he might have been talking cold
start, like the big ol' red switch on the old PC, not waking one up from
standby.

BRS was what I was referring to. All the modern PCs I've seen allow it with
the proper BIOS setting.

>But only the OP knows the answer to that.

 

[Frnak McKenney]

On Thu, 15 Sep 2011 13:23:59 -0700, Rich Grise <richg@example.net.invalid> wrote:

krw@att.bizzzzzzzzzzzz wrote:
On Wed, 14 Sep 2011 11:45:15 -0700, Rich Grise <richg@example.net.invalid
wrote:
krw@att.bizzzzzzzzzzzz wrote:
On Wed, 14 Sep 2011 11:52:21 GMT, N0Spam@daqarta.com (Bob Masta) wrote:
"Back in the day" it was common to use the switch on the
plug strip to turn on the computer, monitor, printer, etc
all at once. Now, it seems the computer's power button must
be pushed.

[...]

Is it just that modern technology has gone so far out there that you'd
have to do computer hacker/technology archaeology to find something that
actually accomplishes the same thing as they did back then, as simply as
they did back then?

You mean like wakeup-on-LAN? ;-)

...or how about a switch?

Well, kinda like that, yeah. But I believe there are still household
telephones that ring, and that _was_ the OP's question. (OK, not so much
"ring" as "over the telephone line.") And he might have been talking cold
start, like the big ol' red switch on the old PC, not waking one up from
standby.

But only the OP knows the answer to that.

Pardon my ignorance...

Does anyone know the details of how the "momentary-on" type of
desktop PC power switch works?

I have a copy of the PDF "ATX12V Power Supply Design Guide Version
2.2 ", but it's a little vague as to how a given power supply gets
switched on and off. It appears from the description of the PS_ON#
signal in section 3.3.2. ...

The power supply shall provide an internal pull-up to TTL high.
The power supply shall also provide de-bounce circuitry on PS_ON#
to prevent it from oscillating on/off at startup when activated by
a mechanical switch.

That seems to hint that some PSes might simply tie a latching,
low-power button between PS_ON# and GND, while others might use a
different approach, using PS_ON# for Wake-On-LAN and other features.

All of that is background for this question: What would the effect
be of simply shorting the "power" switch permanently? Or, if the
particular PC involved uses a momentary-contact button and provides
internal -- electronic -- latching, of shorting the switch every
(say) second? Or -- as asked by others -- every time the telephone
rings?

_IF_ (and it's a big "if") this has NO effect on a _running_ system,
then the net effect would be to switch the PS "on" once each time
power came up, or (in the last case) the first time the telephone
rang after power was interrupted and restored.

Jes' a thought...


Frank McKenney
--
It is hardly too strong to say that the Constitution was made to
guard the people against the dangers of good intentions. There
are men in all ages who mean to govern well, but _They mean to
govern_. They promise to be good masters, _but they mean to be
masters_. -- Daniel Webster
--
Frank McKenney, McKenney Associates
Richmond, Virginia / (804) 320-4887
Munged E-mail: frank uscore mckenney aatt mindspring ddoott com

 

[Jamie]

Frnak McKenney wrote:

On Thu, 15 Sep 2011 13:23:59 -0700, Rich Grise <richg@example.net.invalid> wrote:

krw@att.bizzzzzzzzzzzz wrote:

On Wed, 14 Sep 2011 11:45:15 -0700, Rich Grise <richg@example.net.invalid
wrote:

krw@att.bizzzzzzzzzzzz wrote:

On Wed, 14 Sep 2011 11:52:21 GMT, N0Spam@daqarta.com (Bob Masta) wrote:

"Back in the day" it was common to use the switch on the
plug strip to turn on the computer, monitor, printer, etc
all at once. Now, it seems the computer's power button must
be pushed.


[...]


Is it just that modern technology has gone so far out there that you'd
have to do computer hacker/technology archaeology to find something that
actually accomplishes the same thing as they did back then, as simply as
they did back then?

You mean like wakeup-on-LAN? ;-)

...or how about a switch?

Well, kinda like that, yeah. But I believe there are still household
telephones that ring, and that _was_ the OP's question. (OK, not so much
"ring" as "over the telephone line.") And he might have been talking cold
start, like the big ol' red switch on the old PC, not waking one up from
standby.

But only the OP knows the answer to that.


Pardon my ignorance...

Does anyone know the details of how the "momentary-on" type of
desktop PC power switch works?

I have a copy of the PDF "ATX12V Power Supply Design Guide Version
2.2 ", but it's a little vague as to how a given power supply gets
switched on and off. It appears from the description of the PS_ON#
signal in section 3.3.2. ...

The power supply shall provide an internal pull-up to TTL high.
The power supply shall also provide de-bounce circuitry on PS_ON#
to prevent it from oscillating on/off at startup when activated by
a mechanical switch.

That seems to hint that some PSes might simply tie a latching,
low-power button between PS_ON# and GND, while others might use a
different approach, using PS_ON# for Wake-On-LAN and other features.

All of that is background for this question: What would the effect
be of simply shorting the "power" switch permanently? Or, if the
particular PC involved uses a momentary-contact button and provides
internal -- electronic -- latching, of shorting the switch every
(say) second? Or -- as asked by others -- every time the telephone
rings?

_IF_ (and it's a big "if") this has NO effect on a _running_ system,
then the net effect would be to switch the PS "on" once each time
power came up, or (in the last case) the first time the telephone
rang after power was interrupted and restored.

Jes' a thought...


Frank McKenney
over riding the mother boards control of the power may cause some side

effects, depending on the MB design. There is always the possibility of a
power management on the MB that needs to be sequenced properly so that
special power supplies do not need to be used in such cases of design.

The OS may get confused as to what state the machine is in.. In any
case, you can experiment if you wish. Tie the GREEN wire to common
(black), that turns on the supply.. at least the last time I checked it did.

Jamie

 

[whit3rd]

On Tuesday, September 13, 2011 12:02:54 PM UTC-7, nikos wrote:

By the way, following my initial request, I have installed a security
system (Paradox SP 7000) that is able to receive dial tones. This
security system provides 4 PGMs (Programmable Modules) that are
actually 4 relays. Each relay can be controlled through the dial tones
over the phone line.
The thing is that when I close the relay, it remains closed and I need
about 2-3 seconds in order to open it (through the dial tones). If I
connect the relay to a PC switch button then the computer switches on
and off because the 2-3 seconds duration is long.

So, connect through the relay to the CPU's AC power, and (using BIOS)
program the computer to start up after power failure. Three
seconds of power-off and then you have the computer ON.

It'd be possible, too, to use a resistor-capacitor high pass filter
on the switch contacts, so it goes low only for a half second
or so after the contacts close (but that means running your power-button
wiring outside the box to get to the relay, and shielding against
pickup of stray signals is an issue). A one-shot multivibrator
does the same thing, but is more work. It also might be possible to
find a BIOS setting that changes that 'duration is long' timing.

Lastly, if the computer is good enough at sleep mode, you could
consider using other control points than the front panel button,
like the WOL (wake-on-LAN) input that many logic boards provide.

 

[John Fields]

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioannou@gmail.com>
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

   A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

.. Vcc>-+---------+----+-------+-------+----+---+----+
.. |R1 |R2 |R3 8| |R4 | | |
.. [10k] [10k][470K]+---+---+ [1M] | | K1| COM O->PCSW
.. | C1 | Rt| 2|_ Vcc _|4 | |C3 | [COIL]- -|
.. +-[100nF]-+----|--O|T R|O--+ [1ľF] | | O-> |
.. | | 6| | |C4 | |K | |NO
.. O COM +---|TH 555| [10nF] |[1N4148]| +----->PCSW
..DTMF | | 7|_ |3 | | |D1 |
..RELAY | <-O NO +--O|D OUT|O--|----|---+----+
..CONTACTS | +| | GND | | |
.. | [1ľF] +---+---+ | |
.. | Ct|C2 1| U1 | |
..GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

--
JF

 

[John Fields]

On Fri, 16 Sep 2011 18:52:05 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioannou@gmail.com
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

   A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

. Vcc>-+---------+----+-------+-------+----+---+----+
. |R1 |R2 |R3 8| |R4 | | |
. [10k] [10k][470K]+---+---+ [1M] | | K1| COM O->PCSW
. | C1 | Rt| 2|_ Vcc _|4 | |C3 | [COIL]- -|
. +-[100nF]-+----|--O|T R|O--+ [1ľF] | | O-> |
. | | 6| | |C4 | |K | |NO
. O COM +---|TH 555| [10nF] |[1N4148]| +----->PCSW
.DTMF | | 7|_ |3 | | |D1 |
.RELAY | <-O NO +--O|D OUT|O--|----|---+----+
.CONTACTS | +| | GND | | |
. | [1ľF] +---+---+ | |
. | Ct|C2 1| U1 | |
.GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

---
Oops...

.. Vcc>-+---------+----+-------+-------+----+
.. |R1 |R2 |R3 8| |R4 |
.. [10k] [10k][470K]+---+---+ [1M] |
.. | C1 | Rt| 2|_ Vcc _|4 | |C3
.. +-[100nF]-+----|--O|T R|O--+ [1ľF]
.. | | 6| | |C4 |
.. O COM +---|TH 555| [10nF] |
..DTMF | | 7|_ |3 | |
..RELAY | <-O NO +--O|D OUT|O--|----|---+----+
..CONTACTS | +| | GND | | | |K |
.. | [1ľF] +---+---+ | |[1N4148]|
.. | Ct|C2 1| U1 | | D1| | COM O->PCSW
.. | | | | | | [COIL]- -|
.. | | | | | | K1| O-> |
.. | | | | | | | |NO
.. | | | | | | | +----->PCSW
..GND>------+----------+-------+-------+----+---+----+

--
JF

 

[John Fields]

On Sat, 17 Sep 2011 02:29:09 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Fri, 16 Sep 2011 18:52:05 -0500, John Fields
jfields@austininstruments.com> wrote:

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioannou@gmail.com
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

   A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

. Vcc>-+---------+----+-------+-------+----+---+----+
. |R1 |R2 |R3 8| |R4 | | |
. [10k] [10k][470K]+---+---+ [1M] | | K1| COM O->PCSW
. | C1 | Rt| 2|_ Vcc _|4 | |C3 | [COIL]- -|
. +-[100nF]-+----|--O|T R|O--+ [1ľF] | | O-> |
. | | 6| | |C4 | |K | |NO
. O COM +---|TH 555| [10nF] |[1N4148]| +----->PCSW
.DTMF | | 7|_ |3 | | |D1 |
.RELAY | <-O NO +--O|D OUT|O--|----|---+----+
.CONTACTS | +| | GND | | |
. | [1ľF] +---+---+ | |
. | Ct|C2 1| U1 | |
.GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

---
Oops...

. Vcc>-+---------+----+-------+-------+----+
. |R1 |R2 |R3 8| |R4 |
. [10k] [10k][470K]+---+---+ [1M] |
. | C1 | Rt| 2|_ Vcc _|4 | |C3
. +-[100nF]-+----|--O|T R|O--+ [1ľF]
. | | 6| | |C4 |
. O COM +---|TH 555| [10nF] |
.DTMF | | 7|_ |3 | |
.RELAY | <-O NO +--O|D OUT|O--|----|---+----+
.CONTACTS | +| | GND | | | |K |
. | [1ľF] +---+---+ | |[1N4148]|
. | Ct|C2 1| U1 | | D1| | COM O->PCSW
. | | | | | | [COIL]- -|
. | | | | | | K1| O-> |
. | | | | | | | |NO
. | | | | | | | +----->PCSW
.GND>------+----------+-------+-------+----+---+----+

---
Or...

..+V>---O COM
.. DTMF |
..RELAY | <-O--+--[+BFC]--+ COM
..CONTACTS NO | | O->PCSW
.. [10k] [COIL]- -|
.. | | O-> |
..GND>---------+----------+ |NO
.. +----->PCSW

--
JF

 

[John Fields]

On Sat, 17 Sep 2011 02:13:21 -0700 (PDT), nikos <niioannou@gmail.com>
wrote:

On Sep 17, 10:43 am, John Fields <jfie...@austininstruments.com
wrote:
On Sat, 17 Sep 2011 02:29:09 -0500, John Fields





jfie...@austininstruments.com> wrote:
On Fri, 16 Sep 2011 18:52:05 -0500, John Fields
jfie...@austininstruments.com> wrote:

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioan...@gmail.com
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

. Vcc>-+---------+----+-------+-------+----+---+----+
.      |R1       |R2  |R3    8|       |R4  |   |    |      
.    [10k]     [10k][470K]+---+---+ [1M]   |   |  K1| COM O->PCSW
.      |   C1    |  Rt|  2|_ Vcc _|4  |    |C3 | [COIL]- -|
.      +-[100nF]-+----|--O|T     R|O--+  [1 F] |    | O-> |
.      |              |  6|       |   |C4  |   |K   | |NO
.      O COM          +---|TH  555| [10nF] |[1N4148]| +----->PCSW
.DTMF  |              |  7|_      |3  |    |   |D1  |    
.RELAY | <-O NO       +--O|D   OUT|O--|----|---+----+
.CONTACTS  |         +|   |  GND  |   |    |    
.          |        [1 F] +---+---+   |    |        
.          |        Ct|C2    1| U1    |    |    
.GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

---
Oops...

. Vcc>-+---------+----+-------+-------+----+        
.      |R1       |R2  |R3    8|       |R4  |              
.    [10k]     [10k][470K]+---+---+ [1M]   |                    
.      |   C1    |  Rt|  2|_ Vcc _|4  |    |C3            
.      +-[100nF]-+----|--O|T     R|O--+  [1 F]              
.      |              |  6|       |   |C4  |            
.      O COM          +---|TH  555| [10nF] |                    
.DTMF  |              |  7|_      |3  |    |              
.RELAY | <-O NO       +--O|D   OUT|O--|----|---+----+
.CONTACTS  |         +|   |  GND  |   |    |   |K   |
.          |        [1 F] +---+---+   |    |[1N4148]|  
.          |        Ct|C2    1| U1    |    | D1|    |  COM O->PCSW
.          |          |       |       |    |   |  [COIL]- -|
.          |          |       |       |    |   |  K1|  O-> |
.          |          |       |       |    |   |    |  |NO
.          |          |       |       |    |   |    |  +----->PCSW
.GND>------+----------+-------+-------+----+---+----+

---
Or...

.+V>---O COM
. DTMF |          
.RELAY | <-O--+--[+BFC]--+     COM
.CONTACTS  NO |          |      O->PCSW
.           [10k]      [COIL]- -|
.             |          |  O-> |
.GND>---------+----------+  |NO
.                           +----->PCSW

--
JF- Hide quoted text -

- Show quoted text -

John, is there a way to perform a logical test on these circuits,
before actually assemble them ?
Is there some kind of software that could be used ?

---
Yes, LTspice. Free.

http://www.linear.com/designtools/software/

BTW, there's a mistake on the 555 circuits; C2 and C3 should be 1ľF.


--
JF

 

[nikos]

On Sep 17, 10:43 am, John Fields <jfie...@austininstruments.com>
wrote:

On Sat, 17 Sep 2011 02:29:09 -0500, John Fields





jfie...@austininstruments.com> wrote:
On Fri, 16 Sep 2011 18:52:05 -0500, John Fields
jfie...@austininstruments.com> wrote:

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioan...@gmail.com
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

. Vcc>-+---------+----+-------+-------+----+---+----+
.      |R1       |R2  |R3    8|       |R4  |   |    |      
.    [10k]     [10k][470K]+---+---+ [1M]   |   |  K1| COM O->PCSW
.      |   C1    |  Rt|  2|_ Vcc _|4  |    |C3 | [COIL]- -|
.      +-[100nF]-+----|--O|T     R|O--+  [1 F] |    | O-> |
.      |              |  6|       |   |C4  |   |K   | |NO
.      O COM          +---|TH  555| [10nF] |[1N4148]| +----->PCSW
.DTMF  |              |  7|_      |3  |    |   |D1  |    
.RELAY | <-O NO       +--O|D   OUT|O--|----|---+----+
.CONTACTS  |         +|   |  GND  |   |    |    
.          |        [1 F] +---+---+   |    |        
.          |        Ct|C2    1| U1    |    |    
.GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

---
Oops...

. Vcc>-+---------+----+-------+-------+----+        
.      |R1       |R2  |R3    8|       |R4  |              
.    [10k]     [10k][470K]+---+---+ [1M]   |                    
.      |   C1    |  Rt|  2|_ Vcc _|4  |    |C3            
.      +-[100nF]-+----|--O|T     R|O--+  [1 F]              
.      |              |  6|       |   |C4  |            
.      O COM          +---|TH  555| [10nF] |                    
.DTMF  |              |  7|_      |3  |    |              
.RELAY | <-O NO       +--O|D   OUT|O--|----|---+----+
.CONTACTS  |         +|   |  GND  |   |    |   |K   |
.          |        [1 F] +---+---+   |    |[1N4148]|  
.          |        Ct|C2    1| U1    |    | D1|    |  COM O->PCSW
.          |          |       |       |    |   |  [COIL]- -|
.          |          |       |       |    |   |  K1|  O-> |
.          |          |       |       |    |   |    |  |NO
.          |          |       |       |    |   |    |  +----->PCSW
.GND>------+----------+-------+-------+----+---+----+

---
Or...

.+V>---O COM
. DTMF |          
.RELAY | <-O--+--[+BFC]--+     COM
.CONTACTS  NO |          |      O->PCSW
.           [10k]      [COIL]- -|
.             |          |  O-> |
.GND>---------+----------+  |NO
.                           +----->PCSW

--
JF- Hide quoted text -

- Show quoted text -

John, is there a way to perform a logical test on these circuits,
before actually assemble them ?
Is there some kind of software that could be used ?

Thanks
Nikos

 

[John Fields]

On Sat, 17 Sep 2011 05:18:40 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Sat, 17 Sep 2011 02:13:21 -0700 (PDT), nikos <niioannou@gmail.com
wrote:

John, is there a way to perform a logical test on these circuits,
before actually assemble them ?
Is there some kind of software that could be used ?

---
Yes, LTspice. Free.

http://www.linear.com/designtools/software/

---
Nicos,

Here's a circuit list with both circuits on it:


Version 4
SHEET 1 948 680
WIRE -976 -80 -1104 -80
WIRE -928 -80 -976 -80
WIRE -832 -80 -864 -80
WIRE -736 -80 -832 -80
WIRE -624 -80 -736 -80
WIRE -288 -80 -624 -80
WIRE -976 -32 -976 -80
WIRE -832 -32 -832 -80
WIRE -624 -32 -624 -80
WIRE -736 -16 -736 -80
WIRE -976 112 -976 48
WIRE -832 112 -832 48
WIRE -832 112 -976 112
WIRE -736 112 -736 48
WIRE -736 112 -832 112
WIRE -544 112 -736 112
WIRE -256 112 -320 112
WIRE -624 176 -624 48
WIRE -544 176 -624 176
WIRE -288 176 -288 -80
WIRE -288 176 -320 176
WIRE -624 240 -624 176
WIRE -544 240 -624 240
WIRE -160 240 -320 240
WIRE -80 240 -160 240
WIRE -80 288 -80 240
WIRE -288 304 -320 304
WIRE 208 320 80 320
WIRE 352 320 288 320
WIRE 400 320 352 320
WIRE 512 320 464 320
WIRE 608 320 512 320
WIRE 608 336 608 320
WIRE -976 368 -976 112
WIRE -912 368 -976 368
WIRE -768 368 -832 368
WIRE -288 368 -288 304
WIRE -288 368 -768 368
WIRE -160 368 -160 240
WIRE 352 384 352 320
WIRE -1104 400 -1104 -80
WIRE -976 400 -976 368
WIRE 80 400 80 320
WIRE 224 400 224 368
WIRE 512 400 512 320
WIRE -1152 416 -1232 416
WIRE -768 416 -768 368
WIRE -624 416 -624 240
WIRE -80 416 -80 368
WIRE -1232 432 -1232 416
WIRE 608 448 608 416
WIRE -1232 544 -1232 512
WIRE -1152 544 -1152 464
WIRE -1152 544 -1232 544
WIRE -1104 544 -1104 480
WIRE -1104 544 -1152 544
WIRE -976 544 -976 480
WIRE -976 544 -1104 544
WIRE -768 544 -768 480
WIRE -768 544 -976 544
WIRE -624 544 -624 480
WIRE -624 544 -768 544
WIRE -256 544 -256 112
WIRE -256 544 -624 544
WIRE -160 544 -160 432
WIRE -160 544 -256 544
WIRE -80 544 -80 496
WIRE -80 544 -160 544
WIRE 80 544 80 480
WIRE 80 544 -80 544
WIRE 224 544 224 480
WIRE 224 544 80 544
WIRE 272 544 272 368
WIRE 272 544 224 544
WIRE 352 544 352 464
WIRE 352 544 272 544
WIRE 512 544 512 464
WIRE 512 544 352 544
WIRE 608 544 608 528
WIRE 608 544 512 544
WIRE -1232 640 -1232 544
FLAG -1232 640 0
SYMBOL Misc\\NE555 -432 208 M0
SYMATTR InstName U1
SYMBOL res -96 272 R0
SYMATTR InstName R1
SYMATTR Value 960
SYMBOL res -848 -48 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res -992 -48 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap -864 -96 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value .1ľ
SYMBOL voltage -976 384 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -640 -48 R0
SYMATTR InstName R4
SYMATTR Value 470k
SYMBOL cap -640 416 R0
SYMATTR InstName C2
SYMATTR Value 1ľ
SYMBOL voltage -1232 416 R0
WINDOW 0 -53 5 Left 0
WINDOW 3 -242 110 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value PULSE(0 1 1 1E-6 1E-6 3 0 1)
SYMBOL sw -1104 496 M180
WINDOW 0 32 15 Left 0
WINDOW 3 32 44 Left 0
SYMATTR InstName S1
SYMBOL res -816 352 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL cap -784 416 R0
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL diode -752 -16 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL voltage 224 384 R0
WINDOW 0 -53 5 Left 0
WINDOW 3 -242 110 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 1 1E-6 1E-6 3 0 1)
SYMBOL sw 304 320 M270
WINDOW 0 32 15 Left 0
WINDOW 3 32 44 Left 0
SYMATTR InstName S2
SYMBOL voltage 80 384 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL cap 464 304 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C4
SYMATTR Value 300ľ
SYMBOL res 592 320 R0
SYMATTR InstName R6
SYMATTR Value 960
SYMBOL res 336 368 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL diode 528 464 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL ind -96 400 R0
SYMATTR InstName L1
SYMATTR Value 4
SYMATTR SpiceLine Rser=960
SYMBOL ind 592 432 R0
SYMATTR InstName L2
SYMATTR Value 4
SYMBOL diode -144 432 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D3
SYMATTR Value 1N4148
TEXT -1216 576 Left 0 !.model SW SW(Ron=10m Roff=1G Vt=0.5Vh=0)
TEXT -1216 608 Left 0 !.tran 5 startup uic
TEXT -120 160 Left 0 ;OMRON
TEXT -160 192 Left 0 ;G5V-2-H1-DC12
TEXT 568 240 Left 0 ;OMRON
TEXT 528 280 Left 0 ;G5V-2-H1-DC12

---
Copy it to a file, name it anything you like as long as it has a .asc
suffix, (anyfile.asc, say) navigate to it with LTspice, and you can
run it.

--
JF

 

[John Fields]

On Sat, 17 Sep 2011 07:53:14 -0500, John Fields
<jfields@austininstruments.com> wrote:

..
..
..

And yet another way:

Version 4
SHEET 1 880 680
WIRE 288 80 -288 80
WIRE 352 80 288 80
WIRE 352 96 352 80
WIRE 288 112 288 80
WIRE 288 192 288 176
WIRE 352 192 352 176
WIRE 352 192 288 192
WIRE 352 224 352 192
WIRE -288 272 -288 80
WIRE -160 272 -288 272
WIRE -16 272 -80 272
WIRE 32 272 -16 272
WIRE 144 272 96 272
WIRE 176 272 144 272
WIRE 288 272 256 272
WIRE -288 336 -288 272
WIRE -144 336 -144 320
WIRE -16 336 -16 272
WIRE 144 336 144 272
WIRE -288 448 -288 416
WIRE -144 448 -144 416
WIRE -144 448 -288 448
WIRE -96 448 -96 320
WIRE -96 448 -144 448
WIRE -16 448 -16 416
WIRE -16 448 -96 448
WIRE 144 448 144 400
WIRE 144 448 -16 448
WIRE 352 448 352 320
WIRE 352 448 144 448
WIRE -288 528 -288 448
FLAG -288 528 0
SYMBOL voltage -144 320 R0
WINDOW 0 -53 5 Left 0
WINDOW 3 -242 110 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 1 1E-6 1E-6 3 0 1)
SYMBOL sw -64 272 M270
WINDOW 0 32 15 Left 0
WINDOW 3 32 44 Left 0
SYMATTR InstName S1
SYMBOL voltage -288 320 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL cap 96 256 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 10ľ
SYMBOL res -32 320 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL diode 160 400 R180
WINDOW 0 -43 33 Left 0
WINDOW 3 -76 1 Left 0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL ind 336 80 R0
SYMATTR InstName K1
SYMATTR Value 4
SYMATTR SpiceLine Rser=960
SYMBOL res 272 256 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL npn 288 224 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL diode 304 176 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D2
SYMATTR Value 1N4148
TEXT -272 472 Left 0 !.model SW SW(Ron=10m Roff=1G Vt=0.5Vh=0)
TEXT -272 504 Left 0 !.tran 5 startup uic
TEXT 280 16 Left 0 ;OMRON
TEXT 232 48 Left 0 ;G5V-2-H1-DC12V

--
JF

 

[Jasen Betts]

On 2011-09-17, nikos <niioannou@gmail.com> wrote:

John, is there a way to perform a logical test on these circuits,
before actually assemble them ?
Is there some kind of software that could be used ?

here's yet another way to do it.

relay
contacts
+3V3---[1K]-----//--------PWR-SW+
|
[1K] resistors
|
+0V


+3V3 and 0V are taken from the motherboard power connector
orange and black wires, PWR-SW+ is the power switch terminal
that is not connected to ground

the the relay contacts close pwr-sw+ to be connected via the resistor
to the +3v3 which is at 0V while the PC is off causing the PC to turn on
then the +3V3 comnes alive and the pc no-longer sees the "power button"
signal

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---

 

[whit3rd]

On Saturday, September 17, 2011 9:12:36 PM UTC-7, Jasen Betts wrote:

here's yet another way to do it.

relay
contacts
+3V3---[1K]-----//--------PWR-SW+
|
[1K] resistors
|
+0V


+3V3 and 0V are taken from the motherboard power connector

That will not work if the switch is to turn the computer ON, because the
3V3 is not powered. Only the purple wire, 5V standby power, is
active before the power-switch event. While this won't achieve turn-on,
it will possibly wake from sleep (depending on the motherboard).

the the relay contacts close pwr-sw+ to be connected via the resistor
to the +3v3 which is at 0V while the PC is off causing the PC to turn on
then the +3V3 comnes alive and the pc no-longer sees the "power button"
signal

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to ne...@netfront.net ---

 

[Jasen Betts]

On 2011-09-19, whit3rd <whit3rd@gmail.com> wrote:

On Saturday, September 17, 2011 9:12:36 PM UTC-7, Jasen Betts wrote:

here's yet another way to do it.

relay
contacts
+3V3---[1K]-----//--------PWR-SW+
|
[1K] resistors
|
+0V


+3V3 and 0V are taken from the motherboard power connector

That will not work if the switch is to turn the computer ON, because the
3V3 is not powered.

That's the whole idea

The "power button" works by grounding the "pwr-sw+" pin.

The 3v3 provides a logic high so that the relay's input is ignored after
the power comes up, avoiding the problem where the long on-time of the
relay causes a subsequent shutdown of the computer.

--
⚂⚃ 100% natural

--- Posted via news://freenews.netfront.net/ - Complaints to news@netfront.net ---

 

[Man-wai Chang]

Some years ago, I had an answering machine which, if I pressed a
certain number key at some point in the "leave your message" interval,
could replay my messages over the phone line to me.

Great terrorist tool!!

--
@~@ You have the right to remain silence.
/ v \ Simplicity is Beauty! May the Force and farces be with you!
/( _ )\ (Fedora 15 i686) Linux 3.0.4
^ ^ 10:30:01 up 2 days 13:43 0 users load average: 0.00 0.06 0.08
不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):
http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa

 

[Man-wai Chang]

You are not trying to make a IED, are you?

IED = Improvised Explosive Devices !

--
@~@ You have the right to remain silence.
/ v \ Simplicity is Beauty! May the Force and farces be with you!
/( _ )\ (Fedora 15 i686) Linux 3.0.4
^ ^ 10:30:01 up 2 days 13:43 0 users load average: 0.00 0.06 0.08
不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):
http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa

 

[Michael A. Terrell]

John Fields wrote:

On Thu, 15 Sep 2011 12:23:54 -0700 (PDT), nikos <niioannou@gmail.com
wrote:

On Sep 14, 12:26 am, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

A simple 555 timer wired as a one shot & a small relay.

--
You can't have a sense of humor, if you have no sense.- Hide quoted text -

- Show quoted text -

Michael, I DO LIKE YOUR APPROACH.

Do you know of a circuit layout, using NE555 in order to close the PC
switch button (using small relay) and open it after 500 millisecs ?

---
View using a fixed-pitch font.

. Vcc>-+---------+----+-------+-------+----+---+----+
. |R1 |R2 |R3 8| |R4 | | |
. [10k] [10k][470K]+---+---+ [1M] | | K1| COM O->PCSW
. | C1 | Rt| 2|_ Vcc _|4 | |C3 | [COIL]- -|
. +-[100nF]-+----|--O|T R|O--+ [1ľF] | | O-> |
. | | 6| | |C4 | |K | |NO
. O COM +---|TH 555| [10nF] |[1N4148]| +----->PCSW
.DTMF | | 7|_ |3 | | |D1 |
.RELAY | <-O NO +--O|D OUT|O--|----|---+----+
.CONTACTS | +| | GND | | |
. | [1ľF] +---+---+ | |
. | Ct|C2 1| U1 | |
.GND>------+----------+-------+-------+----+

PCSW connects across the PC's "START" switch.

--
JF

Thanks, John for helping him out. I lost all my tools because of
that crappy firmware bug on a Seagate Barracuda drive and haven't felt
well enough to track them all down again.


--
You can't have a sense of humor, if you have no sense.