Greetings, I have 3D printed a rotating platform device. It consists of an Arduino Uno, a buck boost convertor, and a micro servo. The connections are straight forward. 5V from the battery pack straight into the Arduino (Vin) and buck boost convertor. The buck booster convertor is there encase I want to run a small 12v light or something else. But currently, it is not powering anything.
For 3 out of the 5 USB battery packs tested, they flash and shut off when I plug in the USB to power the device I made.
Packs that don't work: myCharge RazorMega RZ20KK The other two are generic and not labelled. Purchased from overseas.
I've made two of these devices and shipped them out to friends for testing. I currently building the third so I can test more myself. They have tried charging their phone from the battery pack. Then inserting the USB to power the device in another USB slot on the pack, but it shuts off the same as described before. There must be some protection or surge occurring to trip these certain battery packs.
Anyone have any ideas for a potential solution? -Thank you
Correction: The servo + & - are connected to the battery. Only signal goes to the Arduino. Imagine the battery pack is the USB battery packs explained above.