Buffered oscillator (CB26338E)

This circuit was found in an Electronics Now from the 90s. The frequency depends on the crystal. The maximum recommended value is around 5 MHz.

Mixer with unit gain (CB8758E)
This circuit was found in a 90s Radio Electronics. The integrated circuit admits an equivalent. The...
Intelligent battery charger (CB7130E)
Suggested by Radio Electronics from the 90s, this circuit is suitable for NiCAd batteries with a...
Key Touch Switch (CB16269E)
To control direct current loads, under voltages between 12 and 200 V, and currents up to 3 A, we...