Double checking circuitry

Hi all,

I’m trying to make a robot that is Bluetooth controlled, that incorporates a servo motor, several LEDs, and an audio system. I have attached a photo of my circuitry, and I know it’s not pretty with the wires everywhere.

If it’s relevant, I’m using a TB6612FNG driver, and a 12V DC Motor.

I am wondering if someone could double check this and make sure there is no fatal design errors. I understand if someone doesn’t want to look over the entire circuitry, but at the very least, double check the 5V 3A regulator? I’m unsure if I got the design right and not in the mood to burn something lol.


A fritzing image is a complete waste of time. Please learn how to draw a proper schematic, start with a pencil and paper, that’s all you need. You learn a lot by creating a schematic, that’s a large part of the process.

Yes, you are correct that the 5 volt regulator is wrong and that’s about the only decodable part of the image. There is no negative/ground connection on an LM350.


Hi, Welcome to the forum.

Please read the post at the start of any forum , entitled "How to use this Forum". OR,148850.0.html. Then look down to item #7 about how to post your code. It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :)

Is the battery 3.7 or 12 volts? You have the black capacitor in series with the regulator so the regulator will not work. You also seem to want to feed unregulated power into a pin labeled 5V so something might very well go poof!