NE602 Crystal Oscillator (CB26005E)

This oscillator reaches 50 MHz with an overtone crystal. The circuit is from Electronics Now magazine from February 1997.

Frequency Doubler with the 741 (CB12267E)
In the figure we have a circuit with two operational amplifiers 741 capable of doubling the...
Shield for relay activation in Motor control (CB23716E)
What differentiates this circuit from the previous one is the need for a much smaller current to...
Microprocessor supervisor (CB9321E)
This circuit was obtained in a Maxim documentation from the 90's. The circuit applies to...