Arduino diy battery tester

WARNING: pin 4 and 8 on the schematic are swapped.
This is the correct schematic:
espelett.altervista.org/wp-co...
In this video we'll see how to make a battery tester using an Arduino and some other components.
Firmware download page:
espelett.altervista.org/teste...
Versione italiana:
• Tester per pile con Ar...
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#arduino #tutorial #projects #tester #display #diy #code #firmware

[@snoopnogg1918]

hi is this applicable for 2pcs AA NI-MH battery? The discharge voltage limit can be set? and is there a tutorial on how to make it?

[@Hamster2wire]

Thank you for the tutorial. May i know how to modify for 9v batteries?

[@espelett]

Hi. Check the page linked in description. I've added schematic and firmware for the 9V version.

[@Hamster2wire]

@@espelett Saw it. Thank you

[@bruceknipe6255]

Thanks, but LM358 Pin 4 should be GND and 8 Vdd?

[@espelett]

Yes, there is an error in the schematic. I wrote it in the description of the italian version of the video, but not here. This is the corrected schematic: espelett.altervista.org/wp-content/uploads/2023/08/battery_tester-960x679.png Thank you very much.

[@krut888]

Is it normal that during idle operation it shows 0.47v?

[@tancrystelp.3147]

Can I use Arduino uno in this project?

[@espelett]

Yes.