Crystal Oscillator (CB25445E)

This 1 MHz oscillator was found in the February 1992 issue of Radio Electronics magazine. The frequency is set by the crystal which can be changed.

48 V to 15 V step down converter with 1.5 A (CB1572E)
To operate with high input voltages using a 3-terminal voltage regulator such as the LM340-15, we...
Electronic thermometer (CB25161E)
We found this circuit in the October 1988 Radio Electronics magazine. The circuit is still current...
Signal Relay (CB5940E)
This audio signal relay was found in an American 1980s documentation. The relay is in accordance...