Measure capacitance
the old-school way

Capaci-meter uses two classic decade-counters, 555 timers, and LEDs to measure and display capacitance.

We were fortunate to collaborate with Jez Siddons on this project. Jez designed this nearly-exact circuit in 1984 as a high-school project! It is still elegant and impressive as it was back then, we think. Later, he founded PEAK where he continues to designs and manufacture professional electronic component measuring equipment.

Assembly and usage

The project comes with the following components:

Pay special attention to R1-R4 and R1'-R4' so that they are fitted correctly.

Further information

Capaci-meter is an open source design, as is most of our work. You can find the design files for the hardware and packaging at our GitHub repository. You can edit the design files using our own PCB design open source software, PCBmodE.

Capaci-meter was Project #31 of the Boldport Club. If you'd like to purchase a kit, become a member and add one to your order through the shop.

The PCBs were lovingly made by Eurocircuits.

Community contributions for this project are on our community site.