Do not solder the red (5v) USB wire.This wire is for devices that get their power through a USB port (mice, webcams, etc). That's not how this project works. Microcontroller boards receive 5v from a switching regulator that will be installed in the next step. Including the red USB w...
(not shown) from apertures37and39, in the brace member28and the frame bracket23respectively, the leg member26can be folded backward against the frame22as shown inFIG. 4, by pivoting in bracket18to fold the wheel carriage35underneath the frame22. With the wheel carriage35folded up the ...