Patent ID: 6991129

Claim:
A power control circuit used in a vending machine having a bill accepter and at least one vending main unit, and comprised of a pulse signal generator, a trigger, and a driver, wherein said pulse signal generator is installed in a bill inlet of said bill accepter and is adapted to generate a triggering signal upon insertion of a bill into the bill inlet of said bill accepter; said trigger controls said driver to connect power supply to or disconnect power supply from said bill accepter subject to the presence of the triggering signal from said pulse signal generator; said driver is adapted to receive the triggering signal from said trigger and to control the operation of said bill accepter subject to the presence of the triggering signal from said trigger, wherein said trigger comprises a N-channel field effect transistor (Q1) and a D-type flip-flop, said D-type flip-flop having PIN OUT is connected in parallel with N-channel field effect transistor (Q1) to said pulse signal generator, and said D-type flip-flop is connected to said driver.