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.
We obtained this circuit from a 1993 documentation. The circuit has current and voltage ranges that...
The integrated circuits used in this configuration are not common today. The circuit is from the...
This circuit, from an old Argentine publication, provides 6 W of output from an output of less...