hello everyone, I created a BRACHIOGRAPH with a raspberry pi 3 and a three servo here is the documentation https://www.brachiograph.art/ and also here is the github link of the project https://github.com/evildmp /BrachioGraph.git , I noticed that it draws me every time a half circle, so I tried to test the GPIOs of the raspberry pi with the servos I distinguished that the GPIOs do not work except GPIO 14 it's the only one that works can you help me
Hi Sami,
I only looked at one photo because it's too awkward to look through all these links.
There is a chance your breadboard power supply rails are disconnected in the centre, and may need wire links to bridge the gaps.
Also, the jumper cables you are using often break at the ends, so you may think there are connections when there are not. The breadboard could be very faulty too.
Really this design needs to be redone from scratch, using a better prototyping method. A stripboard or other soldered prototyping board could be used, and higher quality jumper wires. It doesn't cost a lot, and will save a ton of troubleshooting time for you. Also, it looks like you may be using a battery to power the servos and it might not be good enough for three servos. A separate supply (could be a DC power brick) would be a better option. You should use a multimeter to confirm there is power to all servos.
The current prototype you have in the photo looks extremely unreliable I'm sorry to say.
