Smart Charger (CB26305E)

This circuit was found in Radio Electronics magazine from the 90's. The circuit is for small NiCad batteries.

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Preamplifier for Low Impedance Microphone (CB928E)
With this circuit, a well known configuration, small speakers and even low-impedance headphones...
TTL Power Shield or Interface (CB4617E)
In this circuit we show how it is possible to control a high power load (which depends on the...
Power inverter (CB22504E)
We found this circuit in a publication from 1966. The components are from the period. Complete...