Found in American documentation from the 90s, this circuit keeps the high beam on for a time determined by the trimpot adjustment. The relay is sensitive 12 V.
This is another quick adder that we found in an Electronic Design from the 80s. It also applies to...
To divide by an odd number‘ means not only the need for flip-flops, but some additional logic too. The...
This capacitive sensor that operates with a high frequency oscillator was found in Radio...