Poptronics recommends this circuit for use in the car when the headlights are left on. The circuit uses a sensitive relay with contact current according to the headlights.
September 2016 - It can be obtained by Mouser Electronics the new dual analog switches TS5A22364 /...
The circuit presented generates short pulses. This configuration was found in a publication from...
This conventional oscillator with the 741 can be precisely adjusted to produce a 400 Hz signal. The...