Saturday, August 12, 2017

Circuit Diagram of Contactless Digital Tachometer using 8051 IC

Robotronicdiagram. - This is one of the application of MCS51 IC family that called with 8051 with the project to build contactless digital tachometer. So, this is circuit diagram of Contactless Digital Tachometer using 8051 IC.

In this time we will give you tha global description about this Circuit Diagram of Contactless Digital Tachometer, and then the last we will give you the link to visit the original source to read more this project.

Circuit Diagram 

Component Part
  1. 8051 Microcontroller
  2. 8051 Development Board
  3. 8051 Microcontroller Programmer
  4. IR Sensor Module (Reflective Type)
  5. 4 – Digit 7 – Segment Display
  6. 4 x 2N2222 NPN Transistors
  7. 4 x 470Ω Resistors (1/4 Watt)
  8. 8 x 100Ω Resistors (1/4 Watt)
  9. 11.0592 MHz Quartz Crystal
  10. 2 x 33pF Ceramic Capacitors
  11. 2 x 10 KΩ Resistor (1/4 Watt)
  12. 10 µF Capacitor (Polarized)
  13. Push Button
  14. 1 KΩ x 8 Resistor Pack
Description

Circuit diagram like in figure 1 above is Circuit Diagram of Contactless Digital Tachometer using 8051 IC. According ElectronicHub site describe that the sensor circuit consists of an IR transmitter and an IR receiver. An IR LED is used as the transmitter and a photo diode is used as the receiver. A reflective type of IR sensor is used in this project. In this type, the IR transmitter and receiver are placed side -by – side.

The IR transmitter circuit is very simple. The anode of the IR transmitter is connected to 5V supply and the cathode is connected to ground through a current limiting resistor of 150Ω. Thus, the IR transmitter starts emitting infrared rays.

IR receiver used in the project is a photo diode and it must be connected in reverse bias. The negative terminal or cathode is connected to 5V supply and the positive terminal or anode is connected to ground through a current limiting resistor of 10KΩ.

And finally, the output of the IR receiver is given to the comparator. The comparator compares the input from the IR receiver with a reference value (which is given through a 10KΩ Potentiometer). If the input from the IR receiver is greater than the reference value, the output of the comparator will be HIGH or else, the output will be LOW.

Please read more this article from original source about Circuit Diagram of Contactless Digital Tachometer using 8051 IC using link Here.


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