Relaxation oscillator
5 parts
No input at all: positive feedback turns the op-amp into a Schmitt trigger, and the capacitor ferries the inverting input between its two thresholds. Square wave at the output, triangle-ish wave on the cap.
- OP1
- C1 100nF
- R1 10kΩ
- R2 10kΩ
- R3 10kΩ
