Ƙididdigar ƙimar resistor don auna kowane ƙarfin wutar lantarki na DC ta amfani da Arduino

Ƙididdigar ƙimar resistor don auna kowane ƙarfin wutar lantarki na DC ta amfani da Arduino

An yi amfani da mai raba wutar lantarki (voltage divider) don lissafa wutar lantarki ga na'urar auna wutar ta Arduino kamar yadda aka nuna a hoto na 1

A cikin wannan hoton muna da:

Wutar baturi VB

Wutar fitarwa da ke zuwa ga fil ɗin shigar V1 na Arduino (watau A0)

R1 shine 30kΩ

R2 shine 7.5kΩ

Arduino UNO yana karɓar 5V a shigar, don haka V1 shine 5V. Daga wannan za mu iya nemo wutar lantarki I a cikin duka R1 da R2. 

I=V/R don haka I=5/7500=0.000666=666µA 

Saboda R1 da R2 suna cikin jerin (series), wutar lantarki iri ɗaya ce ga duka biyun. Don haka IR2 shima 666µA ne. Za mu iya nemo wutar da ke kan R1 kamar haka 

VR1=666µ x 30000=20V.

Yanzu mun san cewa mafi girman wutar a V1 zai iya zama 

VR1+VR2=5V+20V=25V.

Lissafin Ƙimar Wutar Lantarki Mafi Girma

Za mu iya ƙara wani resistor a jerin RX tare da wannan da'irar kamar yadda aka nuna a Hoto na 2.

Hoto na 2. Resistor na jerin RX a cikin da'irar. 

Don nemo ƙimar RX don auna wutar BAT2, muna da:

RX=BAT2-25666uA

Yanzu mun sami dabara (formula) don RX, idan alal misali BAT2 = 120V

To

RX=120-25666uA=95666ua=142.5kΩ

Don haka ta amfani da resistor na 142kΩ a matsayin RX, za mu iya auna har zuwa iyakar 120V.

Hotuna

voltage-sensor-schematic-1

voltage-sensor-schematic-2

voltage-sensor-schematic-1

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