This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's American schematic book. Instead the lamp can be used white high-brightness LEDs.
This circuit can linearly control the temperature of showers, taps or heaters up to 2 500 W. The...
The output voltage of this unit is approximately 1.4 V less than that of the chosen zener. The...
The circuit shown is suggested by Motorola and consists of an amplifier with very high input...