This 2002 circuit makes it possible to leave the soldering iron with two temperatures. Normal, for work and semi-heated on standby with less energy consumption.
This PLL circuit includes a small amplification stage. We found it in the December 1989 Radio...
Found in English documentation from the 1980s, this 3 transistors siren directly drives a small...
We found this circuit in a 1995 publication. It makes use of infrared LEDs of the type existing at...