10 baht coin Exchange machines using infrared sensors, called sensor. Working principle of infrared sensors is that when there is an object through the larap module, sensor signal works by releasing a wave signal to the next ic design LOL monostable function by creating a single signal or shock (one-shot), and then sent to the ICS 74192 acts as a synchronous circuit, 10 count. Forwarded to the 7447 to decode and display the numbers on the 7 segment.
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