This circuit is used to turn on the headlights when it gets dark. The circuit is from an Electronics Now magazine from October 1998. The power transistor must be equipped with a heatsink.
This circuit was suggested by Texas Instruments in a manual of operational amplifiers. Other...
This circuit for vehicular use is from an 80's American publication. The circuit has a light...
An interesting point of this project is that it is used not only for a robotics project but also...