Friday, December 5, 2014

Voltage, Temperature & Frequency Meter With PIC Micro controller

Voltage, Temperature & Frequency Meter
With PIC Micro controller













Features…
  • Voltage, Temperature and Frequency can switching to each others using push buttons.
  • Voltage Meter can measure DC voltage between 0v to 50v.
  • Frequency Meter can measure frequency up to 65KHz.
  • Temperature Meter can use between 00C to 1500C.
  • Every functions can paused using push button.

Instructions…

Voltage meter – 
Volt meter can measure dc voltages up to 50v. 5V is the maximum voltage can handle PIC microcontroller, as it is voltage divider (10K,1.1K) use for convert 50V to 5V . 5v zener diode use for safety of PIC microcontroller analog input pin.

Temperature meter – 
Temperature meter can use between 00C to 1500C. But LM35 sensor can use between -550C to 1500C. Sensor’s resistant is changing opposite to temperature, as it is maximum temperature gives maximum voltage output(5v)  and minimum temperature gives minimum voltage output(0v).  

Frequency meter – 
Theoretically, frequency meter can use up to 65KHz, that is because this circuit made by using Timer 1(16bit) of PIC microcontroller. Timer 0 can only measure up to 256Hz, that is because timer 0 is 8 bit timer. Transistor part is use for safety of microcontroller from amplitude of wave signal. This circuit can apply 12v amplitude or more changing transistor base resistor value(4.7K). I tested it, using 12v amplitude square wave signal. 

Troubleshooting…

If you have problem about accuracy of voltmeter, temperature meter and frequency meter, you can change values (*1,*2,*3) using Guide 01.
Guide 01

7 comments:

  1. can i have a copy of the code in frequency meter. plS??

    ReplyDelete
  2. can i have a copy of the code in frequency meter. plS??

    ReplyDelete
  3. excelente trabajo, didáctico y objetivo...bendiciones

    ReplyDelete
  4. Please sir give me code of frequency measurement using piv16f877a

    ReplyDelete
  5. Please sir give me code of frequency measurement using piv16f877a

    ReplyDelete