I am following a guide to allow you to input sound into the Arduino (https://www.instructables.com/id/Arduino-Audio-Input/). It is a pretty simple schematic however it uses two 9v batteries in series. It is all well and good when testing, but in my actual circuit, I don't want two batteries floating around - It uses the batteries to power the Arduino (through VIN) and also to power the chip (I have the TL082).
How can I get rid of the batteries and use the Arduino's 5V supply? I have a feeling it is quite simple however I can't get my head around it. I can power the Arduino with 12V if need be.
Thanks,
Bod
How can I get rid of the batteries and use the Arduino's 5V supply? I have a feeling it is quite simple however I can't get my head around it. I can power the Arduino with 12V if need be.
Thanks,
Bod