Has anyone ever built one of these - I had a ESR meter which has recently died and need to check a few caps for a monitor so thought I'd give this one a go.
I've build the ESR meter but can't seem to get it to work. If anyone has built one I'd appreciate a few pointers. I've attached a few scope screenshots.
On the circuit IC1A is generating a square wave. The collector is TR1 is shown here (**broken link removed**)
and the collector of TR2 is here (**broken link removed**)
If I short the cap out the LED should come on but it doesn't. The pins 5 and 6 of IC1 are both 0V
Any tips of where I could be going wrong. Such a simple circuit its driving me crazy!
hi
has anyone ever built this kind of esr meter? http://members.shaw.ca/swstuff/esrmeter.html
because i need help regarding potentiometer connection to panel meter and i cant set to zero when i shorted test pt.
..i used 20k potentiomer and only in 25ohms to set,not zero set.
thnks in advance and hoping more coment to get and aswer this problem.
Has anyone ever built one of these - I had a ESR meter which has recently died and need to check a few caps for a monitor so thought I'd give this one a go.
I've build the ESR meter but can't seem to get it to work. If anyone has built one I'd appreciate a few pointers. I've attached a few scope screenshots.