This circuit is from an old Signetics documentation. It can be implemented with modern operational amplifiers. The power supply must be symmetrical.
This circuit produces a sine 1 kHz signal. The frequency is given by C1, C2 and C3. This is a...
This circuit allows controlling a LASER pointer with an input logic signal. R has 10 ohm for 3 V...
This simple injector circuit can actually be powered by voltages from 3 to 9 V. The frequency is...