We found this circuit in a 1980s documentation. Equivalent components can be used. The circuit senses temperatures in the range of 0 to 50º C and uses a transistor as sensor.
This charger for a maximum current of 15 A was obtained from an American 80's schematics. The triac must...
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...
The circuit shown in the figure was found in a 1974 publication. The field effect transistor may...