relay that stays closed until power removed?

[Greg Russell]

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

 

On 19 Jun 2011 19:59:13 GMT, Greg Russell <me@invalid.org> wrote:

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

You want a latching relay. The latching function can be done with a
set of contacts on the relay that parallel the contacts of the "Do Not
Push" switch or you could use the "Do Not Push" switch to trigger an
SCR which operates the relay. Either method will keep the relay
energized until power is removed.

John

 

[Rich Grise]

Greg Russell wrote:

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

A SPST NO switch and a latch. You can use a flip-flop for the latch,
then if you really want to geek it up, you could put a NC magnetic
reed switch behind the (aluminum) panel somewhere so that you could
reset it with a little pocket magnet.

I'm pretty sure you can make a latch with a couple of cross-coupled
transistors or even gates as well.

Have Fun!
Rich

 

[Rich Webb]

On 19 Jun 2011 19:59:13 GMT, Greg Russell <me@invalid.org> wrote:

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

(view with a fixed-width font)

o o
| |
| relay coil |
| push-button _ |
| --- / \ |
.------o o------o-----( K )---------|
| | \_/ |
| | |
| | |
| | |
.-------||------' |
| |
| relay contacts |
| .----------------'
| |
| | __ /|
| 'o-| | |
'-------||----------o-|__| |
\|
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)

Use an ordinary 12 V, double pole relay. Wire the push button in
parallel with one set of contacts and the other set of contacts in
series with the siren. When the button is pressed, both sets of contacts
close. One set is "sustaining" and keeps the relay energized once the
push button is released. The other contacts power the siren. When power
is removed, the relay coil releases the contacts, so when power is
subsequently applied, the siren stays off. Lather, rinse, repeat.

--
Rich Webb Norfolk, VA

 

[Jon Kirwan]

On Sun, 19 Jun 2011 16:18:17 -0400, news@jecarter.us wrote:

On 19 Jun 2011 19:59:13 GMT, Greg Russell <me@invalid.org> wrote:

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

You want a latching relay. The latching function can be done with a
set of contacts on the relay that parallel the contacts of the "Do Not
Push" switch or you could use the "Do Not Push" switch to trigger an
SCR which operates the relay. Either method will keep the relay
energized until power is removed.

John

Kind of like this.

/
/
,---O O---------------,
| |
| | | |
+-----||||----, ,---+
| | | UUUUUUU |
| |
'--------------O O----'
\
\

But with another normally-open switch on the relay for the
horn on a separate circuit loop.

I'd want to include something that would automatically cut
the power at some point later. sci.electronics.design had
posted a nice circuit for that some time back:

: +12 +12 +12 +12
: | | | |
: | | | |
: | \ | |
: | / R1 | | Push button
: | \ 33k | O
: | / | \
: | | | \
: | | | O
: _|_D2 | |<e Q1 |
: /_\ +--------| PNP |
: | | |\c |
:1N4148 | | |
: | | | |
: | \ | |
: | / R2 +----------------+
: | \ 2.2k | |
: | / --- C1 |
: | | --- 4.7uF |
: | | | |
: | | | |
: +---------------+ |
: | | +------, |
: | | | | |
: | | | | |
: | | | | \
: | ||' M1 \ --- / HORN
: | ||< N-MOSFET / R3 / \ D1 \
: '--'|, \ --- /
: | / |1N4148 |
: | |3.3Meg| |
: | | | |
: | | | |
: gnd gnd gnd gnd

Approximately, for a 30 second blast.

Jon

 

[Phil Allison]

"Greg Russell"

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

** By far the cheapest way is to use an SCR to provide the latching
function.

Then use a cheap push switch and resistor of say 1000 ohms from anode to
gate to pulse it into conduction.

A C106D1 would be suitable.


..... Phil

 

[Jasen Betts]

On 2011-06-19, Greg Russell <me@invalid.org> wrote:

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.


I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

this one's simpler than the others have been making it seem.
you need an ordinary 12V automotive relay

just wire the relay coil and the horn in parallel
so that when the horn is powered so is the relay.

then wire the button and the realay contacts in parallel so
that that either can conduct power to the horn.

T 10A
----- fuse
+----o o---+----o\o-----+
| | |
| | -----
| _- | ---
| _- | .
(30) +----o : o---+ (87) . 12V
| : . battery
| : .
(85) +-----[/]----+ (86) .
| | -----
| | ---
| | |
+---{HORN}---+------------+


the numbers shown will match the numbers impressed in the
base of many automotive relays

Any push button switch that is strong enough to run the
horn will suit. (contacts rated 3A or more)


--
⚂⚃ 100% natural

 

[Jasen Betts]

On 2011-06-20, Phil Allison <phil_a@tpg.com.au> wrote:

"Greg Russell"

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?


** By far the cheapest way is to use an SCR to provide the latching
function.

won't the SCR shut down when the horn contacts open?

--
⚂⚃ 100% natural

 

[Tom Biasi]

"Greg Russell" wrote in message news:9672ogFhcbU1@mid.individual.net...

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?

Don't forget the most important part of your plan.
What if he doesn't push it?

 

[Tom Jones]

On 6/19/2011 10:36 PM, Phil Allison wrote:

** By far the cheapest way is to use an SCR to provide the latching
function. Then use a cheap push switch and resistor of say 1000
ohms from anode to gate to pulse it into conduction.
A C106D1 would be suitable.

Phil Allison, you dumb fucking twit! You can do it with just the relay.
Wake the fuck up, moron, or quit giving fucked up advice.

 

[Phil Allison]

"Tom Jones is a Cunt "

** By far the cheapest way is to use an SCR to provide the latching
function. Then use a cheap push switch and resistor of say 1000
ohms from anode to gate to pulse it into conduction.
A C106D1 would be suitable.

Phil Allison, you dumb fucking twit! You can do it with just the relay.

** Please post the cost of a new, 12V latching relay plus push switch from a
major supplier.

Then do the same for a C06D1 SCR plus push switch.

Then go fuck yourself.

Then go drop dead.




.... Phil

 

[Tom Jones]

On 6/20/2011 9:45 AM, Phil Allison wrote:

** Please post the cost of a new, 12V latching relay plus
push switch from a major supplier.

You don't need a latching relay moron!
And he didn't ask for cheap anyway.

Look at Rich Webb's solution.
Evidently he is a _real_ electronics designer, unlike you-
Twit!

 

[Jamie]

Jasen Betts wrote:

On 2011-06-20, Phil Allison <phil_a@tpg.com.au> wrote:

"Greg Russell"

Hell, I'm not familiar with all the basic electronic component names; I'm
just learning, and need some help please.

I want to create an electronic joke for a friend's shop trainer: a push
button on the console of the trainer will be labeled "Do Not Push". If
someone chooses to push it, an electric horn will sound until the 12v
battery source is disconnected.

What type of switch or relay is it that will close and sound the horn
when the button is pushed, but will stay closed when the button is
released, then open when the power source is disconnected?


** By far the cheapest way is to use an SCR to provide the latching
function.


won't the SCR shut down when the horn contacts open?

exactly..

Jamie

 

[Phil Allison]

"Tom Jones is a FUCKING TROLL "

** Please post the cost of a new, 12V latching relay plus
push switch from a major supplier.

You don't need a latching relay moron!

** That is not why I asked the question FUCKHEAD !

And he didn't ask for cheap anyway.

** No need for any OP to ask.

Go fuck your mother.

Then go fuck yourself.

Then go drop dead.





..... Phil

 

[Tom Jones]

On 6/20/2011 6:42 PM, Phil Allison wrote:

"Tom Jones is a FUCKING TROLL"

Tom Jones is just giving the Twit, Allison, a bit of his own medicine.
And he can't take it! Can you, Twit?

Go fuck your mother.

How 'bout I go fuck _your_ mother?
That is, if you had one that you know about.

Now go get a switch and a relay and jack them off for while, and you
might figure out how to make the OP's project work.

Or, just look at Rich Webb's solution.
Twit!

 

[Geoff]

Tom Jones <tomjones@example.com> wrote in news:itnnlm$u3r$4@dont-email.me:

On 6/20/2011 9:45 AM, Phil Allison wrote:

** Please post the cost of a new, 12V latching relay plus
push switch from a major supplier.

You don't need a latching relay moron!
And he didn't ask for cheap anyway.

Look at Rich Webb's solution.
Evidently he is a _real_ electronics designer, unlike you-
Twit!

Phils idea is both cheap and fits the OP's requirement EXACTLY. Even
simpler to make, can be enclosed in some heatshrink in some looming,
doesn't require to be mounted, doesn't waste a relay, could be made in
about 1.5 minutes. I'd say Phil was referring to an ordinary relay
configured as a latch too, but that is still much more expensive than Phils
idea.

 

[petrus bitbyter]

"Geoff" <my@email.com> schreef in bericht
news:Xns9F0AEFC717080Geoff@88.198.244.100...

Tom Jones <tomjones@example.com> wrote in news:itnnlm$u3r$4@dont-email.me:

On 6/20/2011 9:45 AM, Phil Allison wrote:

** Please post the cost of a new, 12V latching relay plus
push switch from a major supplier.

You don't need a latching relay moron!
And he didn't ask for cheap anyway.

Look at Rich Webb's solution.
Evidently he is a _real_ electronics designer, unlike you-
Twit!

Phils idea is both cheap and fits the OP's requirement EXACTLY. Even
simpler to make, can be enclosed in some heatshrink in some looming,
doesn't require to be mounted, doesn't waste a relay, could be made in
about 1.5 minutes. I'd say Phil was referring to an ordinary relay
configured as a latch too, but that is still much more expensive than
Phils
idea.

Technically it fits perfectly. Practically I doubt whether any of the ideas
provided will do for the OP. He needs a a OPSS relay or an SSR. Does he know
what they are and how to connect them? Can he read the schematics? As long
as the OP does not react on the provided stuff there is no need to provide
more info.

petrus bitbyter

 

[Greg Russell]

On Tue, 21 Jun 2011 14:55:44 +0200, petrus bitbyter wrote in
4e00947d$0$26295$e4fe514c@dreader26.news.xs4all.nl :

Technically it fits perfectly. Practically I doubt whether any of the
ideas provided will do for the OP. He needs a a OPSS relay or an SSR.
Does he know what they are and how to connect them? Can he read the
schematics? As long as the OP does not react on the provided stuff there
is no need to provide more info.

Well, I'm trying to understand everything that's been presented. I won't
have access to the horn information (amperage) until July 5.

I didn't mean for the discussion to erupt into a fight with name-calling
etc.

I'm sorry for that, even though it's not my fault. I tend to run and hide
when things like that happen.

 

[Phil Hobbs]

Greg Russell wrote:

On Tue, 21 Jun 2011 14:55:44 +0200, petrus bitbyter wrote in
4e00947d$0$26295$e4fe514c@dreader26.news.xs4all.nl :

Technically it fits perfectly. Practically I doubt whether any of the
ideas provided will do for the OP. He needs a a OPSS relay or an SSR.
Does he know what they are and how to connect them? Can he read the
schematics? As long as the OP does not react on the provided stuff there
is no need to provide more info.

Well, I'm trying to understand everything that's been presented. I won't
have access to the horn information (amperage) until July 5.

I didn't mean for the discussion to erupt into a fight with name-calling
etc.

I'm sorry for that, even though it's not my fault. I tend to run and hide
when things like that happen.

Phil A. is a good pro audio EE with some mental health issues t. Listen
to what he says about audio, but don't mind his vituperation--he can't
help it.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics Electro-optics Photonics Analog Electronics

55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058

email: hobbs (atsign) electrooptical (period) net
http://electrooptical.net

 

[petrus bitbyter]

"Greg Russell" <me@invalid.org> schreef in bericht
news:96msklFs9jU1@mid.individual.net...

On Tue, 21 Jun 2011 14:55:44 +0200, petrus bitbyter wrote in
4e00947d$0$26295$e4fe514c@dreader26.news.xs4all.nl :

Technically it fits perfectly. Practically I doubt whether any of the
ideas provided will do for the OP. He needs a a OPSS relay or an SSR.
Does he know what they are and how to connect them? Can he read the
schematics? As long as the OP does not react on the provided stuff there
is no need to provide more info.

Well, I'm trying to understand everything that's been presented. I won't
have access to the horn information (amperage) until July 5.

I didn't mean for the discussion to erupt into a fight with name-calling
etc.

I'm sorry for that, even though it's not my fault. I tend to run and hide
when things like that happen.

"I'm sorry for that, even though it's not my fault. I tend to run and hide
when things like that happen."

You should not. We live in an insane world after all and the internet does
not filter most of the patients. (Not even me So stick at the facts
concerning your question and disregard the rest.

Though to be able to give any more help, we need some more information. Like
the amperage of the horn for example. Are you able to read electronic
schematics? If you can't it's no use to provide one without at least some
extensive explanation.

petrus bitbyter