Standard 1 MHz Oscillator (CB9653E)

We found this circuit in an old American documentation. Transistors can be modern equivalents.

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...