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 found this circuit in the 1982 SGS Linear Integrated Circuits manual. The integrated circuit used...
This circuit is from the 2005 Linear Technology Application Manual. The circuit must be powered by 5...
The circuit, shown in the figure, consists of an audio oscillator that generates signals between...