[sdiy] Re continuity tester:

[Scott Gravenhorst]

Ah well, I agree with you, Paul.  I hadn't thought of
this case, and surely a continuity tester would help
here.  An ICM7555 may also be used as a multivibrator,
and it's CMOS, so also battery friendly (the data sheet
says power supply current typical is 80 microamps).  It
will also run from 3 volts.

pfperry at melbpc.org.au wrote:
>I don't agree with Scott on this one. Suppose you have a 
>intermittent short or break in a lead, you can detect it by 
>shaking the cord while the continuity tester is connected & 
>listening for little bips. You can't do that with a meter, plus 
>you have to look at the meter! Also, in troubleshooting, is is 
>REALLY rare that a 'low ohms' connection will trip you up. If it 
>is something you made yourself, usually you are looking for 
>shorts. If you are repairing, you are usually looking for breaks. 
>A two transistor multivibrator running on 3v makes a useful 
>continuity tester. paul perry Melbourne Asutralia -- Message sent 


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