Found in a 1965 Electronic Design, this high voltage circuit uses period transistors. Its purpose was to excite Nixie display tubes common at the time.
We found this car battery status monitor circuit in an American 80s manual. The circuit has its...
Using a 4046 PLL this circuit recognizes a 1.6 to 1.8 kHz tone by driving an output LED. The...
This circuit was found in an old RF documentation. The circuit cuts out the incoming sinusoidal...