![I'm trying to make a guitar tuner using an arduino and a TL082 op-amp. Is there any way I can supply the amp without using 2 9V batterys to get the -9 I'm trying to make a guitar tuner using an arduino and a TL082 op-amp. Is there any way I can supply the amp without using 2 9V batterys to get the -9](https://preview.redd.it/im-trying-to-make-a-guitar-tuner-using-an-arduino-and-a-v0-ndzrzia6p5v91.jpg?width=640&crop=smart&auto=webp&s=a09fc268e096af5ffe560d8b2d1ce546f6441583)
I'm trying to make a guitar tuner using an arduino and a TL082 op-amp. Is there any way I can supply the amp without using 2 9V batterys to get the -9
![operational amplifier - Op-amp input stage for Arduino Due ADC - guitar signal - Electrical Engineering Stack Exchange operational amplifier - Op-amp input stage for Arduino Due ADC - guitar signal - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/AJBoq.png)
operational amplifier - Op-amp input stage for Arduino Due ADC - guitar signal - Electrical Engineering Stack Exchange
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