Xisaabinta qiimaha resistor-ka si loo cabbiro danab DC kasta iyadoo la isticmaalayo Arduino

Xisaabinta qiimaha resistor-ka si loo cabbiro danab DC kasta iyadoo la isticmaalayo Arduino

Qaybiyaha danabka ayaa loo isticmaalaa in lagu xisaabiyo danabka sensor-ka danabka ee Arduino sida ku cad Jaantuska 1

Jaantuskan waxaan ku helnay:

Danabka batteriga VB

Danabka soo baxa ee u gudbaya Arduino pin-ka gelinta V1 (tusaale A0)

R1 waa 30kΩ

R2 waa 7.5kΩ

Arduino UNO waxay aqbashaa 5V ee gelinta, sidaas darteed V1 waa 5V. Tan waxaan ka heli karnaa hadda I ee labada R1 iyo R2. 

I=V/R sidaas darteed I=5/7500=0.000666=666µA 

Sababtoo ah R1 iyo R2 waa taxane, hadda isku mid ayay u yihiin labadaba. Marka IR2 sidoo kale waa 666µA. Waxaan heli karnaa danabka ku kala goysa R1 sida 

VR1=666µ x 30000=20V.

Hadda waxaan ognahay in danabka ugu sarreeya ee V1 uu noqon karo 

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

Xisaabinta Qiimaha Danabka Waaweyn

Waxaan ku dari karnaa resistor kale oo taxane ah RX oo ku jira wareeggan sida ku cad Jaantuska 2.

Jaantuska 2. Resistor-ka taxanaha ah RX ee wareegga. 

Si loo helo qiimaha RX ee lagu cabbiro danabka BAT2, waxaan leenahay:

RX=BAT2-25666uA

Hadda waxaan helnay qaacidada RX, haddii tusaale ahaan BAT2 = 120V

Markaas

RX=120-25666uA=95666ua=142.5kΩ

Marka la isticmaalo resistor 142kΩ ah sida RX, waxaan cabbiri karnaa ilaa ugu sarreeya 120V.

Sawirro

Voltage sensor schematic 1

Voltage sensor schematic 2

Voltage sensor schematic 1

Voltage sensor schematic 2