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.
This circuit that uses only discrete components (transistors) mimics the sound of an American...
This circuit was found on an application note from Linear Technology of the 1990s. The source must...
This VCO or Voltage Controlled Oscillator uses common components. The circuit generates signals that...