Capacitance measurements

Recently I've been focusing on a project I'm calling LibreTester. It's an open hardware Arduino-based component tester. It measures transistors, capacitors, resistors, and diodes. However I've been having trouble measuring small capacitances. Hack-A-Day posted about this fellow who was measuring very small capacitance accurately. You can find his description of the methods he's using in his blog posts here and here.

I've had a hard time measuring very small capacitance with my breadboard circuit. I'm waiting for a few prototype pcbs I ordered to arrive, I'll test how well the circuit can measure small capacitances on a pcb. I'm concerned that long wires and the capacitance of the bread board is making it difficult.

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