We have gained expertise in offering a quality approved range of AT89C52 Microcontroller.
The microcontroller controls the counting and displays the number of persons present in the hall/room. The control logic is built around transistors, operational amplifier LM324 (IC1) and JK flip-flop (IC2). When nobody is passing through the entry/exit point, the IR beam continuously falls on phototransistor T1. Phototransistor T1 conducts and the high voltage at its emitter drives transistor T3 into saturation, which makes pin 3 of comparator N1 low and finally output pin 1 of comparator N1 is high. Features:
- Programmer can be connected to the PC through the serial port: COM1 to COM4
- Supports both Parallel and SPI Programming
- Facility is available to program the device soldered in the target hardware through SPI bus