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Versatile Object Counter
Object counters are extensively used in industries. Normally, these are made of expensive microcontrollers or processors. For small-scale industries, this means a lot of cost. Here is a simple circuit that can count objects without using any costly microcontroller. The circuit is good for those who are not familiar with programming of microcontrollers. Moreover, there is the flexibility of increasing the count using a small expansion circuit.
The NE555 timer (IC1) is configured as a monostable multi-vibrator that generates a pulse of 330ms duration. This monostable output is given as clock to dual up-counter CD4518 (IC2). IC2 increments on every positive edge of the clock, giving a BCD output on pins 3 to 6. The purpose of NE555 timer is to prevent signal debouncing from transistor T2. NE555 timer gives a perfect clock pulse.
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