| 摘要 |
A timer for controlling a dispensing machine and in particular the dispensing cycle for a product such as coffee, a beverage, or instant mashed potatoes is disclosed. The control includes regulation of the water portion of the cycle and the solid or powder portion of the cycle. The timer IC1, IC2 is controlled by a plurality of touch switches X1-X5 each coupling via a resistor network to the control logic of the timer. The control logic is preferably CMOS-type having a high input impedance permitting use of a resistor network of high resistance to limit current flow especially under fault. The touch switches control functions such as "hot water", "large portion", "small portion", "stop", and "push and hold". In response to operation of switch X5 or X2, a bistable logic circuit is set to enable a timer operation for activating a solenoid and a gear motor. <IMAGE> |
