Found in the March 1992 Radio Electronics magazine, this circuit has two supply voltages. The maximum input voltage is 14 V.
Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor....
This low-pass filter was found in an American publication from the 80's. The circuit uses an...
Who is the fastest? This circuit with neon lamp is powered directly by the network (there is no...