Hey folks want to make an ESR meter been studying various designs and came across this PIC based version...
**broken link removed**
Looks ok but doesn't use a conventional 100khz test signal, but instead pulses the capacitor and uses PIC dac to measure voltage drop and then work out ESR - so is this going to be a problem where accuracy is concerned?
BTW I really like the idea of capacitance measurement on top of ESR as my multimeter and pic based LC meter is limited in upper range to about 15uF!
There is also a similar Russian version below but seems a little over complicated whilst using a similar approach!
Yes I had seen that, and a few others - but as I have most of the parts for the above, and the desire (more than the need maybe) to measure capacitance in one unit I was specifically interested in one of the digital versions presented above.
I guess I will have to build this and an analogue meter then compare the results.
I am sure there is someone here with an opinion though?
Yes I had seen that, and a few others - but as I have most of the parts for the above, and the desire (more than the need maybe) to measure capacitance in one unit I was specifically interested in one of the digital versions presented above.
I guess I will have to build this and an analogue meter then compare the results.
I am sure there is someone here with an opinion though?
hi olly,
Your posted circuit was shown in the Forums last year, IIRC it was considered to be a 'concept' circuit designed only for a students assignment.