The purpose of this circuit found in an old Elektor is to light a lower power lamp when the bigger one burns out. The loads depend on the triacs.
This circuit can be used as a shield for microcontrollers such as the Arduino. Frequency is given...
We found this car theft alarm circuit in a 1988 publication, but the components used can still be...
This conventional slow-moving circuit uses incandescent light bulbs, but can be changed to use...