“This instructable is for a Capacitor meter based on the ATTiny85 with the following features.
Based on ATTiny85 (DigiStamp)
SSD1306 0.96” OLED Display
Frequency measurement for low value capacitors 1pF - 1uF using 555 oscillator
Charge time measurement for high value capacitors 1uF - 50000uF
2 separate ports used for the methods to minimise stary capacitance
Two values of current used for Charge Time to minimise time for large capacitors
555 method self zeros at start up, can be rezeroed with push button
A quick test used to select which method should be used for each cycle of measurement.
Charge time method accuracy can be improved by support for OSCVAL clock frequency adjustment”