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 circuit triggers a relay when light strikes a sensor. The sensitivity is adjusted in the...
This well-crafted speed game setup for two competitors was found in a 1998 Poptronics. The circuit...
This circuit serves to receive optical signals modulated in amplitude providing an audio signal at its...