Re: ESR meter for a novice
I'm sorry but i have to back up devid21 on this one - i have designed a PCB for the same meter, built it, and it works just fine. It IS accurate enough on a larger meter movement such as that found in older multimeters, besides, if you feel you need more accuracy, you can always hook a DMM set on the 200mV scale in parallel with the analog meter. Then all you need is to make a nifty table to decode the DMM's voltage reading into resistance values.
I can notice bad caps even when operating it into a VU meter, because when the cap is in good condition, measuring it is accompanied by a rewarding click sound as the meter hits the peg due to overshoot. If the cap is anything less than perfect, the meter won't click even if it does go full scale.
I'm sorry but i have to back up devid21 on this one - i have designed a PCB for the same meter, built it, and it works just fine. It IS accurate enough on a larger meter movement such as that found in older multimeters, besides, if you feel you need more accuracy, you can always hook a DMM set on the 200mV scale in parallel with the analog meter. Then all you need is to make a nifty table to decode the DMM's voltage reading into resistance values.
I can notice bad caps even when operating it into a VU meter, because when the cap is in good condition, measuring it is accompanied by a rewarding click sound as the meter hits the peg due to overshoot. If the cap is anything less than perfect, the meter won't click even if it does go full scale.
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