The circuit shown is from old English documentation and can be made with BC548 transistors for low power ones. The 2N3055 must be mounted on a heat radiator.
This old circuit that makes use of germanium transistors, can be modernized with the use of...
The circuit presented was suggested by Texas Instruments in an opto-electronics manual. The...
This 4-digit digital clock for hours and minutes with CMOS integrated circuits was found in a 1995...