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Author Topic: Read solar panel values  (Read 453 times)
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Hello, I hope you can help me, thanks.

I have an Arduino ADK and two solar panels of 5V/700mA, I need connect solar panels to Arduino for read the values ​​of voltage/current, but this is not possible, because these values ​​are not supported by the arduino , especially input of 700mA (arduino max current input is 40mA).

Is there any way to connect the solar panels for read this values correctly?

Thank you very much.

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Shannon Member
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For measuring voltages in excess of 5V a voltage divider is typically used, for measuring current there are two
approaches, either a dedicated current sensor, or add a "shunt resistor" in the current path to be measured
and then measure the voltage difference across this shunt - a low value shunt resistor is desirable to reduce
wasted power, but leads to low voltages that need to be amplified to get a decent resolution.

Current sensor modues are sometimes hall-effect (no shunt resistor), some need their own shunt resistor
but do the amplification of voltage difference for you.

[ I won't respond to messages, use the forum please ]

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