We found this circuit in an old Mullard (Philips) documentation. The sensor consists of a reed-switch that is coupled to a magnet on one of the wheels of the vehicle.
Found in a 90s 303 Circuits, this circuit aims to provide a soft start for a low voltage halogen lamp....
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
Any TTL inverter can be used in this circuit. We found it in documentation from the 80s, but it...