This circuit was obtained from the April 1978 Radio Electronics magazine. The other circuit is a PLL of the time. The power supply must be 15 V symmetrical.
The circuits shown in the figure, that of an infrared video signal transmitter and receiver, were...
This simple indicator was found in a 1980s American documentation. The circuit uses an operating system...
This is the traditional 555 monostable configuration found at many points in this section and on...