This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Saturday, February 6, 2016

Negative Voltage Inverter

Here's a super quicky for your Saturday. Got a request over on Facebook for a simple voltage inverter using the 1044/7660 chipset. Great for when you need to power a positive ground effect like PNP Fuzz Faces and Tone Benders but still want to daisy chain it with negative ground effects or not use a battery.


  1. Replies
    1. Cut the trace between pins 1 and 8 if your using a 1054. Otherwise I think that's all the modification you'd need to do. Double check the datasheets though.

  2. My voltage inverter doesn't work. I can't understand what is wrong. There is no voltage on output

  3. Hi there ! does it works with +12v in the input for +/-12v (not AC) effects ?
    Thanks ! :)

    1. You'll need to check the datasheet of the chip you're using, but I think the max input voltage of both the 1044 and 7660 is less than 12v. I think a 1054 has a higher rating though. And if you use the 1054, you'll need to cut the trace between pin 1 and 8 of the IC in the layout.

    2. YEEEE thanks for the fast answer !! definitely give it a try soon

  4. Hi there! First of all I'd like to sincerely thank you for the work you're doin here, I think that's incredibly useful and inspiring sooo... thank you brother. Actually, I'm also writing to tell you I just finished building this device and it's giving me -9.47v at the output so I guess you can tag it as verified, unless there are other requirements.
    I followed your layout, only difference is that I didn't connect pin1 to pin8 according to 7660's datasheet, but I also breadboarded it following your version and it works as well.
    That said, thank you again for everything, ciao from Italee :)))

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