The Planted Tank Forum - View Single Post - Arduino Diy pH probe
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post #15 of (permalink) Old 01-28-2013, 09:59 PM
Children Boogie
mistergreen's Avatar
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
you can use resistors to limit voltage and current. Ohm's law. Knock down to what you need for the lcd and leave it at 5V for the pH sensor.

Get yourself a breadboard and test things out first before you start soldering. There's a process that makes life easier.

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