Found in a 90s EDN, this circuit uses components from that time. The circuit supplies a current of 100 mA with a 5V voltage.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This circuit turns on an old cassette recorder when the telephone rings, thus enabling the...
This circuit can be used in panel signaling with common incandescent lamp. The lamp will flash at a...