Another quick experiment w/ the CircuitCo Educational BoosterPack.
- Measures capacitance (< 1nF) and inductance using LC tank frequency measuring method.
- Measures capacitance (> 1nF) with time-to-charge method.
- Measures (or rather attempts to measure) capacitor ESR values by pulse injecting currents through capacitors.
- Bare minimal component count, experimental hookup.
I called this a "Meter Template" instead of a "Meter" as I consider this hookup as a base to develop a "Full" meter. There are quite a few things "missing" when compare w/ other common designs you can find on the internet, that affects accuracy and usability.
- Breadboard is no good for capacitance measuring, and LC tanks.
- Instead of using transistors to source and sink currents through test subjects, I drive them direct (close to 30mA on one pin).
- No relays to switch inputs, have to use your hand.
- No relays / switches to map multiple ranges components. One range for all (well, we have high and low capacitance).
And it's fully functional with not-too-bad accuracy.
Schematic and additional write-ups will follow.