Bu projede pic12f683 kullanılarak voltaj tepe dedektörü yapılmış. Pic mikrodenetleyicilerin adc pinleri 0-5 volt arası gerilim değerlerinde ölçüm yapabildiklerinden hesaplama sonucu bulunan direnç değerleri ile gerilim bölücü devresi tasarlanmış ve 0-650 volt arası gerilim değerleri okunabilmiştir.

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This project consists in detecting voltage alternating with a family of PIC 12F. There will be an explanation of the technique used to measure tension.

Its main features are:

* 0-voltage input 650Vpp
* Microprocessor Controlled
* Signs with 2 LEDs
* Auto-fuelled tension measure

The biggest problem with this project is like getting to the CIP him came a voltage proportional to the voltage to measure but that this rank between 0 and 5 V.

To do this we will make a brief explanation of the technique used.

Circuit voltage reducer

For the calculation of reducer use Kirchhoff’s laws and basic circuit is shown in Figure 1.

The circuit consists of 3 resistors connected as follows:
– R1 between Vin and Voute
– R2 between Vr and Voute
– R3 between mass and Voute

Being Vin tension that we want to measure, Voute tension to be applied to the PIC and Vr the reference voltage for the conversion of PIC.

For this project we will use the PIC12F683 which has converters 10-bit resolution or what is the same we have a range of 0 to 1023.

With these data we can estimate the resolution with the following formula:

– Reading of 1023 amounted to 650 V
– Reading 0 equates to 512 V
– Reading 0 equates to -650 V

Methodology

The sine wave alternating is a frequency of 50Hz implying that has a period of 20 ms.

Having rectified the signal we will focus on the positive semionda and the process will be:

– Detection of zero step by generating a break.
– Expecting to reach the peak value (5ms).
– Measure the value

The detection of zero per se basa step in the theory of AN521 from Microchip

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