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General : 4026 counter circuit

Message 1 of 5 in Discussion

From:

sirkituk (Original Message)

Sent: 3/7/2007 4:36 PM

Hi everyone

I have a 3 digit counter circuit based on the 4026 IC

It is suffering from spurious false triggering

I have checked that the input is good, the unit digit seems reliable but the carry function is intermitent.

The board has been thoroughly checked for dry joints and anything suspicious has been resoldered

Does anyone have some useful experience to share that might help please

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Message 2 of 5 in Discussion

Sent: 3/8/2007 9:09 AM

This message has been deleted due to termination of membership.

Message 3 of 5 in Discussion

From:

sirkituk

Sent: 3/8/2007 9:54 AM

Hi Ken

4000 series are CMOS

Yes chips were out of holders when soldering

Whole circuit is CMOS running on 9V

I don't think chips have been damaged by handling because fault is intermittant - it sometimes works fine!

Regards

Message 4 of 5 in Discussion

From:

sirkituk

Sent: 3/16/2007 10:39 AM

As a result of visiting electronics groups I have received some very sound advice on my problem (to my e-mail address) and am hopeful that I will have it fixed very soon.

Thanks

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Message 5 of 5 in Discussion

Sent: 3/16/2007 2:26 PM

This message has been deleted due to termination of membership.

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