Is there an equation I can use to calculate:
- the actual capacitance between two PCB tracks close together and
- the actual capacitance between two adjacent holes of a breadboard
I believe such capacitance is called stray capacitance but I'm not 100% sure.
The reason why I ask is because I make super-regenerative receivers and the results are different when I transfer the circuit to PCB from a breadboard, most notably capacitance values, and I verify this because the reception frequency (station) is different even though I haven't change any values of any components.
The rest of the parts that form the circuit in both cases are exactly the same including the wall wart 5VDC power supply.
I also would like equations in order to make successful tests on the breadboard, so then I don't have to waste solder, or PCB material over failed attempts, and yes I removed and re-soldered components in the past which can be a pain so I want to avoid that route.
Any ideas on how to calculate the capacitance?