PIC12F683 Development Board

I have recently made a new PIC development board for PIC12F683. It is an 8-pin microcontroller with a lot of good features including 10-bit ADC and PWM. The development board has following features:

1. A Regulated +5V power supply.

2. 3 Red LED outputs which can be connected to any GPIO pins using jumper wires.

3. An ON/OFF power supply switch.

4. A Green LED as a power ON indicator.

5. An 8-pin IC socket for PIC12F683 microcontroller.

6. Two potentiometers: one for providing Vref, and other for simulating analog input to ADC.

7. An ICSP header connector.

8. Two tactile switches for input operation.

9. A TTL to RS232 level shifter using a transistor circuit.

10. A piezo buzzer.

11. A DC motor with driving circuit.

12. Access to individual pins of PIC12F683 through female header pins.

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Contact less tachometer using PIC16F628A

Introduction Tachometer is a device that gives you the information about the rotational speed of any shaft or disc. It usually measures the speed in revolutions per minute (RPM). Today we are going to make a simple tachometer that could measure the rotation speed of a disk without making any physical contact (that's why it is contact less) with the rotating object. The range of this tachometer is 0 - 9999 RPM and displays the RPM on a multiplexed 4-digit seven-segment display. Of course, we are going to do this project on our usual PIC16F628A development board. Infrared sensor Contact-less measurement of RPM will be achieved through an IR sensor. An IR diode will send a beam of infrared towards the rotating disc, and any reflected pulse will be received by a photo diode. The resistance of a photo diode drops drastically when exposed to infrared. An infrared is reflected by a white surface and absorbed by the dark ones. The test disc for this project is shown below. You can see ...

Experiment No. 3: LCD Interface in 4-bit Mode

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Experiments with PIC16F628A

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