Elektronic keysystem

Electronic locking system with 4 outputs. As supply voltage, a DC voltage of +5 serves to + 24VDC. This is limited by a voltage regulator to 5V. In supply input sits a diode which performs a reverse voltage protection. A small micro electronics evaluates the digital code from the key and switches the corresponding programmed "OPEN COLLECTOR" output. The code of the programmed keys are in the microcontroller, which can not be read, stored. Each key has a fixed digital code, wherein it is assured that each code is different.