Simple NiCad Charger (CB26201E)

This battery charger was found in the Electronics Experimenter Special Projects of 1983. The circuit uses an SCR as the control element.

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Laser Pulser (CB20745E)
This circuit can modulate a laser rate at frequencies of 50 kHz. We found the old documentation. The bipolar...
Automotive Exhaust Gas Analyzer (CB24802E)
This circuit was found in the May 1984 issue of Radio Electronics magazine. It analyzes the...
Fluorescent Indicator (CB18952E)
This circuit can be used as a signal when powered by a car battery, as it also works with 12 V, or...