Simple IC

[rmartin929]

This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

 

[rmartin929]

On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:

This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

 

[ehsjr]

rmartin929 wrote:

On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:

This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.


I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

1N4001
+------|<-----+
| |
+----+----+---[Motor]---+
| | |
+ | | ___ /c
[LR43] +---o o---[1K]---| NPN
- | SW \e
| |
+-----------------------+

Use an NPN transistor (almost any NPN will do) with a 1K
resistor between the transistor base and the tact switch.
Wire the other side of the switch to battery +, along with
the + side of the motor. Wire the - side of the motor to
the transistor's collector. Put a 1N4001 diode across the
motor with the banded end on the + side. Wire the transistor's
emitter to the - side of the battery.

To squeeze more life out of it, you can run the motor at
reduced speed by installing a resistance between the
transistor collector and the motor. You would have to
experiment to see what speed is acceptable. The higher
the value resistance, the greater the life and the lower
the speed. Your motor has an equivalent resistance
of about 15 ohms, so your experimentation would need
to be with small values of resistance: 2 20 ohm resistors,
1 10 ohm resistor, 1 5 ohm resistor, and 5 1 ohm resistors
would give you every whole value from 1 to 60 ohms by
putting resistors in series.

Ed

 

On 27 Apr 2007 17:48:32 -0700, rmartin929
<randym@one-sourceglobal.com> wrote:

On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:
This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

does the circuit latch? ie press for on, press again for off?

 

[rmartin929]

On Apr 28, 12:23 pm, feebo wrote:

On 27 Apr 2007 17:48:32 -0700, rmartin929





ran...@one-sourceglobal.com> wrote:
On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:
This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

does the circuit latch? ie press for on, press again for off?- Hide quoted text -

- Show quoted text -

As I said I'm no engineer, but I think the answer to your question is
"yes" the circuit latches. Press the tact switch once, motor is on and
remains on, press again motor is off. As I'm sure you know the tact
does not latch it is momentary. The other simple option was to use a
latching switch BUT space/size is a major constraint and I've been
unable to find an ultra small latching switch. We also need to keep
the switch actuation force at a low level 160Gf or less.

The other respondent talked about using resistance to control motor.
I think we want to drive the motor as much as possible without
limiting it. We know we will only get 15-30 minutes of operation, but
that is sufficent. Everything about this application must be small,
small, and smaller AND simple.

You know the battery is an LR43 here is the motor if that is of any
help http://vibratormotor.com/vib/z4tl2a0380581.html

 

[petrus bitbyter]

"rmartin929" <randym@one-sourceglobal.com> schreef in bericht
news:1177795729.690241.231570@c35g2000hsg.googlegroups.com...

On Apr 28, 12:23 pm, feebo wrote:
On 27 Apr 2007 17:48:32 -0700, rmartin929





ran...@one-sourceglobal.com> wrote:
On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:
This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

does the circuit latch? ie press for on, press again for off?- Hide
quoted text -

- Show quoted text -

As I said I'm no engineer, but I think the answer to your question is
"yes" the circuit latches. Press the tact switch once, motor is on and
remains on, press again motor is off. As I'm sure you know the tact
does not latch it is momentary. The other simple option was to use a
latching switch BUT space/size is a major constraint and I've been
unable to find an ultra small latching switch. We also need to keep
the switch actuation force at a low level 160Gf or less.

The other respondent talked about using resistance to control motor.
I think we want to drive the motor as much as possible without
limiting it. We know we will only get 15-30 minutes of operation, but
that is sufficent. Everything about this application must be small,
small, and smaller AND simple.

You know the battery is an LR43 here is the motor if that is of any
help http://vibratormotor.com/vib/z4tl2a0380581.html

Hmm... Latching circuit? How is *that* suppose to work? As far as I can see
the motor will be powered when the switch is pushed and will stop when the
switch is released. So unless you use a latching switch...

Besides, the use of an LR43 battery is questionable. This type of batteries
is made to provide low current during a long time. Some hundreds of
microamperes (uA) during some hundreds of hours. You want over 100mA during
less then an hour. This is way out of the manufacturers specifications. So
if you want to use this type battery you will have to do your own research
to find out the possibilities. It may work but you may as well destroy the
battery. To make things worse, the inside of an LR43 varies depending on
chemistry and manufacturer.

petrus bitbyter

 

[rmartin929]

On Apr 28, 5:37 pm, "petrus bitbyter"
<pieterkraltlaatdit...@enditookhccnet.nl> wrote:

"rmartin929" <ran...@one-sourceglobal.com> schreef in berichtnews:1177795729.690241.231570@c35g2000hsg.googlegroups.com...





On Apr 28, 12:23 pm, feebo wrote:
On 27 Apr 2007 17:48:32 -0700, rmartin929

ran...@one-sourceglobal.com> wrote:
On Apr 27, 5:41 pm, rmartin929 <ran...@one-sourceglobal.com> wrote:
This should be simple question. Here is the simple project.

1 tact switch
1 motor 1.5V 100mA
1 1.5V battery

I need an IC simply to control on/off. I do need one that can operate
as low as .9-1V since the motor draws a lot of power. You can't
change components.

I don't need you to find me the IC necessarily, but tell me what IC
(component) I should be searching for. I'm no engineer so I am just
looking for the keywords to do a search at the least.

I should add one more note. The battery must be a small button battery
LR43 that is why power is concern we need to squeeze as much life out
of it as possible.

does the circuit latch? ie press for on, press again for off?- Hide
quoted text -

- Show quoted text -

As I said I'm no engineer, but I think the answer to your question is
"yes" the circuit latches. Press the tact switch once, motor is on and
remains on, press again motor is off. As I'm sure you know the tact
does not latch it is momentary. The other simple option was to use a
latching switch BUT space/size is a major constraint and I've been
unable to find an ultra small latching switch. We also need to keep
the switch actuation force at a low level 160Gf or less.

The other respondent talked about using resistance to control motor.
I think we want to drive the motor as much as possible without
limiting it. We know we will only get 15-30 minutes of operation, but
that is sufficent. Everything about this application must be small,
small, and smaller AND simple.

You know the battery is an LR43 here is the motor if that is of any
help http://vibratormotor.com/vib/z4tl2a0380581.html

Hmm... Latching circuit? How is *that* suppose to work? As far as I can see
the motor will be powered when the switch is pushed and will stop when the
switch is released. So unless you use a latching switch...

Besides, the use of an LR43 battery is questionable. This type of batteries
is made to provide low current during a long time. Some hundreds of
microamperes (uA) during some hundreds of hours. You want over 100mA during
less then an hour. This is way out of the manufacturers specifications. So
if you want to use this type battery you will have to do your own research
to find out the possibilities. It may work but you may as well destroy the
battery. To make things worse, the inside of an LR43 varies depending on
chemistry and manufacturer.

petrus bitbyter- Hide quoted text -

- Show quoted text -

Regarding latching switch - we can not find one small enough for our
app. Tact switch in conjuction with IC of some sort (this is the part
I don't know) should work. IC component detects power input when tact
switch initiated and then closes circuit for motor operation. When it
receives another power signal from tact it opens circuit ... motor
off. This seems like a very common and basic function.

We've looked at many batteries and tested many as far as space/size
and high drain capability the alkaline is the best I know of. I would
love for someone to prove me wrong and show me a smaller better
battery. Yes it will only operate continuously for < 1 hr. but that
is OK.

 

[RST Engineering (jw)]

A very simple question and please give me yes or no answers before we go any
further.

Have you connected the motor to the battery and let it run continuously?
And did it run for an hour or so?

Is the intention to run continuously once the tact switch is depressed or is
it going to be on-off. If on-off, what is the best estimate of duty cycle
(time on / time off).

Jim




"rmartin929" <randym@one-sourceglobal.com> wrote in message >

We've looked at many batteries and tested many as far as space/size
and high drain capability the alkaline is the best I know of. I would
love for someone to prove me wrong and show me a smaller better
battery. Yes it will only operate continuously for < 1 hr. but that
is OK.

 

[Lostgallifreyan]

"RST Engineering \(jw\)" <jim@rstengineering.com> wrote in
news:1339apq7fqt13b0@news.supernews.com:

"rmartin929" <randym@one-sourceglobal.com> wrote in message
We've looked at many batteries and tested many as far as space/size
and high drain capability the alkaline is the best I know of. I
would love for someone to prove me wrong and show me a smaller better
battery. Yes it will only operate continuously for < 1 hr. but that
is OK.




A very simple question and please give me yes or no answers before we
go any further.

Have you connected the motor to the battery and let it run
continuously? And did it run for an hour or so?

He's done more than answer that, as he already says.

Is the intention to run continuously once the tact switch is depressed
or is it going to be on-off. If on-off, what is the best estimate of
duty cycle (time on / time off).

If he can answer that with yes/no, he's got a whole new kind of advanced
logic and shoulf patent it immediately for a new kind of computer.

Sometimes yes/no is not rigor, but a sign of blinkers the likes of which no
horse would be seen dead wearing.