This is Bob, our 3 ft tall house robot using the Ez-Robot kit and leftovers from plastering angle beads (lengths of perferated coated- right angle tin use to finish edges of plasterboard).
The angle beads are super cheap, can be cut to any length and can be easily riveted together. The big plus is the material is super light but strong. Bobs head comprises of 2 X 1.25 ltr plastic bottles. We are soon to retrofit Bob with Electric drill motors so he can venture up the driveway and down the street.
By Hazbot
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It sounds like your board is browning out because of too much current draw by those servos. You should run your servos off a separate power supply. The same thing happened to my B.O.B. robot. You could probably use a step down regulator to drop your voltage to 6V just for the servos. THat is what I am doing with my B9.
Thanks Bret, with the help of Richie I'm getting a regulator and arranging seperate power to the servos just as you say - I'm also getting stronger servos for his arms.
Special thanks to R2D2 for idea of the claw counter weight being a servo that (with a rod) can run down the arm from the opposite end of the hand and double as a wrist turner...it also takes away the bulk of the servo from the hand (claw) area.
Bobs weight is creeping up since his new arms. Our Target weight was 2.5 kilos - he now weighs 2.6 kilos without his treads (still waiting). His components are still a mix as intended - but we must keep his weight down.
BOBS SPECS
Current weight - 2.6 kilograms Height (without treads) 700 mm Design and concept : Austin .S
With the help of Richie I'm looking to strengthen his arms today with stronger servos and bi-pass the board with power to them to rule out any possible brown outs as we are also looking at adding servo's to rotate his wrists (R2D2) idea to assist counterweight for arms.
Nice... Is Richie close to you?
Yes - Just 10 minutes up the road - I saw his Wall-e entry and he so helpful with incredible knowledge, I'm very lucky.