Found in a 1968 Electronics World, this circuit uses components from the era. In this circuit, a small incandescent lamp is activated when it gets dark.
In the same way that we can regulate the voltage in the positive branch of the circuit, we can...
Based on the MC1488 or MC1489 operational amplifiers, this circuit has a 5000V isolation driving a...
Found in the July 1968 Supertena Bulletin of a Popular Electronics, this receiver makes use of the...