Subwoofer Simulator (CB25130E)

This circuit consists of a bass filter that can be used as a subwoofer in a sound system. The circuit is from a Radio Electronics from May 1988.

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Phase sequence detector (CB8296E)
Found in a 90’s Electronic Engineering, this circuit detects the lack of phase in the supply of a...
Battery charger for Nicad (CB9536E)
This small regulator with transistors can supply 75 mA currents for charging NiCad rechargeable batteries....
Programmed Duty Cycle (CIR095E)
The duty cycle of a Schmitt Oscillator can be programmed by R1 and R2 in this circuit. The...