I'd like to do this Capacitance and ESR meter. It uses a 16x2 hd44780 compatible LCD, a PIC16F876A, a LM339 and a few transistors.
The limitations:
Capacitors smaller than about 10 microfarads cannot be measured for ESR. Capacitance down to 10 picofarads may be measured, however. Devices with appreciable leakage cannot be measured at all for capacitance.
The bugs:
The instrument hangs for a long time if a large capacitor is connected while it is measuring in the low capacitance range.
What do you think of it? Any opinions welcome.
Has anyone successfully built this meter?
The limitations:
Capacitors smaller than about 10 microfarads cannot be measured for ESR. Capacitance down to 10 picofarads may be measured, however. Devices with appreciable leakage cannot be measured at all for capacitance.
The bugs:
The instrument hangs for a long time if a large capacitor is connected while it is measuring in the low capacitance range.
What do you think of it? Any opinions welcome.
Has anyone successfully built this meter?