I am working on a finish-line gate project for toy cars.
My questions is about power cable options.
As the final project with be played with by a child, I want the powering options to be simple.
My initial idea is to use a USB charging wall-brick (from an iPad) to supply 5V @1A.
I need to power an Uno and a separate Max7219 8-digit 7-seg display module board. I want the USB supply to power the both Uno and 7219 board directly (ie, the 7219 is not powered by the Uno’s 5V rail, but rather by the charging brick to assure adequate current).
Here my problem: I only went to use one charging brick, so at some point I need to split the power cable to a USB-B for the Uno and Pins/wire to attach to the Vcc header pin on the 7219 module.
Any ideas on how to split the supply cable or the power? I can always hack something off a USB cable, but the wires in there are really fragile and I’m not sure it would hold up in a play environment. Another idea is to land the USB power on a protoboard and split it off that way. In addition, I have been searching for an off-the-shelf solution but have not had luck finding an items that Y-splits to USB on one side and pigtails/bare wire on the other.
Would love to hear ideas about potential options or examples.