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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Dip Meter with Tunnel Diode (CB23881E)
This is the circuit for the HM-10ª, an instrument sold by Heathkit. The circuit is from a Radio...
Undervoltage Indicator (CB4988E)
This circuit indicates when the monitored voltage drops below the value determined by the divider...
CMOS Drive for Low Level Activation (CB13778E)
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