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.
July 2017 - Mouser Electronics announced the availability of the new NXP MRFX1K80 RF LDMOS...
This micro-transmitter for the FM band was found in documentation from the 90s. The circuit is...
This mixer was found in Silicon Chip documentation from the 90's. The circuit uses integrated...