Automatic delay-controlling device

Claim 1

An automatic delay-controlling device for pre-setting a delay of the switching-on and switching-off of a load, said automatic delay-controlling device comprising a control means, a central processing unit, a read only memory, an address multiplexer, a programmable peripheral interface, an output driver and an alternating-current power supply connected to said output driver through said load; said control means comprising a plurality of buttons electrically connected to said central processing unit and serving as inputs thereof; said central processing unit, read only memory, address multiplexer and programmable peripheral interface being intercommunicated to co-process signals from said control means to control the operation of said output driver; and said output driver comprising a transistor, an optical coupler, a bridge rectifier, a resistor and a TRIAC; the base of said transistor being connected to an output of said programmable peripheral interface; the actuation of said transistor causing said optical coupler to conduct, and via said bridge rectifier and said TRIAC, to control said load.