We found this circuit in the July 1994 Radio Electronics magazine. The circuit uses a general-purpose transistor, and the power supply can be up to 12 V depending on the relay.
This 8-channel converter was found in a 1970s American documentation. The integrated circuits used are...
This circuit was found in an old publication and operates in the 455 kHz IF band since the...
This circuit implements a 3-way control, with outputs in A, B and C, using CMOS integrated...