I need 12vdc pulsating from a 12vdc pwr source

[Dark Alchemist]

How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.

 

[Ross Mac]

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...

How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.
I don't know what your current requirements are, but if it's less than 1

watt or so, a 555 timer circuit should do the job.....Just google
around...there is a ton of data on that chip....good luck....Ross

 

[Dark Alchemist]

Ross Mac wrote:

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...
How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.
I don't know what your current requirements are, but if it's less than 1
watt or so, a 555 timer circuit should do the job.....Just google
around...there is a ton of data on that chip....good luck....Ross

12v at about 450-600ma so well above that 1w range

 

[default]

On Wed, 03 Dec 2003 07:59:12 -0600, Dark Alchemist
<darkalchemist@mysticglow.com> wrote:

Ross Mac wrote:

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...
How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.
I don't know what your current requirements are, but if it's less than 1
watt or so, a 555 timer circuit should do the job.....Just google
around...there is a ton of data on that chip....good luck....Ross

12v at about 450-600ma so well above that 1w range
Add a single pass transistor to the 555 to boost the output current,

one transistor one resistor more.


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[Ross Mac]

"default" <R75/5@defaulter.net> wrote in message
newsjrrsvcqri1gpnpq0v7887gapmgft8enpv@4ax.com...

On Wed, 03 Dec 2003 07:59:12 -0600, Dark Alchemist
darkalchemist@mysticglow.com> wrote:

Ross Mac wrote:

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...
How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.
I don't know what your current requirements are, but if it's less than
1
watt or so, a 555 timer circuit should do the job.....Just google
around...there is a ton of data on that chip....good luck....Ross

12v at about 450-600ma so well above that 1w range
Add a single pass transistor to the 555 to boost the output current,
one transistor one resistor more.


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http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
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Good advice there...just amplify the output.....good luck, Ross

 

[John Fields]

On Wed, 03 Dec 2003 07:59:12 -0600, Dark Alchemist
<darkalchemist@mysticglow.com> wrote:

Ross Mac wrote:

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...
How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.
I don't know what your current requirements are, but if it's less than 1
watt or so, a 555 timer circuit should do the job.....Just google
around...there is a ton of data on that chip....good luck....Ross

12v at about 450-600ma so well above that 1w range

---
A MICREL 4429, a pot, and a cap will do it for 3 parts. Two extra
resistors (maybe just 1) if you want to set the pot's limits at 5Hz and
120Hz.

Interested?
--
John Fields
Professional circuit designer
http://austininstruments.com

 

[Robert Monsen]

"Dark Alchemist" <darkalchemist@mysticglow.com> wrote in message
news:3FCDAA9E.51D2C70@mysticglow.com...

How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?

Anyone have any ideas using the least amount of parts?

Thank you.

John's timer will probably be a good one, but here is one that, while using
more parts, uses parts that are readily available at radioshack.

Make sure you get a cmos 555... look at the package, and make sure its max
Vcc is greater than 12V.

Also, any N-MOSFET you can get will work here.

Adjust the 1MEG trimmer to adjust the frequency.

http://home.comcast.net/~rcmonsen/misc/cn555.jpg

Regards,
Bob Monsen

 

[Indian Summer]

The simpliest amount of part? Yank a dimmer from the salvage yard. No 555
needed.

Turn the knob and you go from about 5 - 1000 hz pulsating - 12V. I used
this trick to arc a coil. What're you making?
Indi

How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?
Anyone have any ideas using the least amount of parts?
Thank you.

 

[Dark Alchemist]

Indian Summer wrote:

The simpliest amount of part? Yank a dimmer from the salvage yard. No 555
needed.

Turn the knob and you go from about 5 - 1000 hz pulsating - 12V. I used
this trick to arc a coil. What're you making?
Indi

How can I get 5-120 hz pulsating 12 vdc from a 12vdc pwr source?
Anyone have any ideas using the least amount of parts?
Thank you.

Thanks all.

A dimmer? Now that has me interested.

As to what I am making its just a test circuit because the circuit works
when hooked up to a 9 volt battery and it touches (arcs) between on and
off on the positive lead. Give it a steady 12vdc and it is next to not
working. Has me stumped so I figured had to want a pulsating DC and
since I have no source for that I can't test it.