Micro Power Schmitt Trigger (CB25139E)

Using a CA3030, this circuit was found in the May 1988 Radio Electronics magazine. The power supply must be symmetrical.

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Locked Alarm (CB4800E)
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...
Transformerless Power Supply (MSB040E)
This circuit shows how an inductive capacitance can be used to reduce the voltage of Power supply...
10W TransistorAmplifier (CB3837E)
We find this conventional amplifier with complementary transistors in a 1987 documentation. The circuit...