Conventional Astable (CB24839E)

This common circuit is from September 1984 Radio Electronics. The transistors are general purpose, and the frequency is given by the capacitors.

| Clique na imagem para ampliar |

Morse Oscillator (CB22050E)
This code practice oscillator was found in an English publication from the 80's. The circuit can...
455 kHz Oscillator (CB3873E)
This crystal oscillator is indicated for the calibration of IF steps of common radio receivers. The...
Relay with optical coupler (CB25491E)
In the figure we have the simple way of controlling a load or having a signal from an optical...