The output pin#3 now initiates with a logic zero output while the IC internal timer starts counting.ĭue to the logic zero, the triac stays switched OFF initially along with the load. When power is first switched ON, C3 at pin#12 of the IC4060 makes sure that the timing count initiates right from zero by resetting pin#12 with a short pulse. The above explains the IC 4060 configuration, now let's learn about the triac configuration.Īs we can see, the output pin#3 is directly connected to the gate of the triac, while the triac A1 and A2 are terminated with the load and the other specified parameters. Therefore suppose we set the RC at pin#9 and 10 with a maximum delay of 2 hours, pin#3 would be assigned to generate alternately changing ON/OFF pulses, having equal delay intervals of 2 hours, meaning initially the output would be OFF for 2 hours, then ON for next 2 hours and so on as long as its powered. Since pin#3 is specified with the highest time interval, we use this pinout as the output. So suppose pin#3 produces delay interval of 1 minute, then pin#2 would produce the same at an interval of 30 seconds, pin#1 at 15 seconds and so on. Here pin#3 produces the largest delay, followed by pin#2 and then pin#1 and so on as per the specified pinout order. This IC has 10 discrete outputs which produce delays or oscillation periods which are twice to the previous pinout in the order. Precisely, the resistor at pin#10 and the capacitor at pin#9 are responsible for fixing the delay period and may be adjusted for acquiring the required predetermined switching output. The components connected at the pin#9,10 and 11 form the time delay determining parts of the IC. The left hand side section comprising the IC 4060 becomes the basic delay generator stage. As we all know, the IC 4060 is an extremely versatile time delay generator chip which has a built in oscillator for the required fundamental timing clocks.
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