Need 3V LED Flasher Circuit

[dale allen]

I have a Dept 56 piece which has two LED strings that blink alternately (one
is on while the other is off). The blinking circuitry has failed. I need a
circuit which operates from 3V that will drive these two strings as the
original circuit.
Thank you,
Dale

 

[Sofie]

Dale:
Instead of re-inventing the wheel, do some troubleshooting and testing and
replace the defective part(s).
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"dale allen" <radiodale@worldnet.att.net> wrote in message
news:ZyIMb.8841$VS4.281019@bgtnsc04-news.ops.worldnet.att.net...

I have a Dept 56 piece which has two LED strings that blink alternately
(one
is on while the other is off). The blinking circuitry has failed. I need a
circuit which operates from 3V that will drive these two strings as the
original circuit.
Thank you,
Dale

 

[Dale Allen]

There are only two transistors and one IC. The transistors are OK and
the IC is a bare die which has been glop topped to the PWB.
Dale




"Sofie" <sofie@olypen.com> wrote in message news:<1006rsqpn823u92@corp.supernews.com>...

Dale:
Instead of re-inventing the wheel, do some troubleshooting and testing and
replace the defective part(s).
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


"dale allen" <radiodale@worldnet.att.net> wrote in message
news:ZyIMb.8841$VS4.281019@bgtnsc04-news.ops.worldnet.att.net...
I have a Dept 56 piece which has two LED strings that blink alternately
(one
is on while the other is off). The blinking circuitry has failed. I need a
circuit which operates from 3V that will drive these two strings as the
original circuit.
Thank you,
Dale

 

[Franc Zabkar]

On 13 Jan 2004 05:59:57 -0800, radiodale@att.net (Dale Allen) put
finger to keyboard and composed:

There are only two transistors and one IC. The transistors are OK and
the IC is a bare die which has been glop topped to the PWB.
Dale

Use a low power CMOS version of the 555 timer, eg LMC555. Set it up as
a 50% duty cycle oscillator and use a PNP and an NPN transistor to
buffer the output.

"Sofie" <sofie@olypen.com> wrote in message news:<1006rsqpn823u92@corp.supernews.com>...
Dale:
Instead of re-inventing the wheel, do some troubleshooting and testing and
replace the defective part(s).
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


"dale allen" <radiodale@worldnet.att.net> wrote in message
news:ZyIMb.8841$VS4.281019@bgtnsc04-news.ops.worldnet.att.net...
I have a Dept 56 piece which has two LED strings that blink alternately
(one
is on while the other is off). The blinking circuitry has failed. I need a
circuit which operates from 3V that will drive these two strings as the
original circuit.
Thank you,
Dale

- Franc Zabkar
--
Please remove one 's' from my address when replying by email.