This simple digital circuit tester can work with TTL technology when powered by 5 V and with CMOS when powered by voltages from 3 to 15 V. The circuit provides LED indications and uses current ICs.
This Japanese commercial medium and short-wave radio uses 7 transistors and tunes the range from...
This control circuit for incandescent lamps was found in a publication from the 90s. The circuit uses...
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...