Steering mount for Tatra OpenRC Trail Truck

thingiverse

Low profile servos I used: https://www.aliexpress.com/item/33041455890.html, Attiny is calculating servo signal for second axle (less rotation) Steering arms are M3 stainless, but will be switched to M4 stainless, steering horns may also change, as I use only 30% of possible servo rotation --> bad steering force I didn't pay much attention to printability during design, so support is needed when printing... Update Nov 7 2020: - added C-file for ATtiny and sketch how to connect (no schematic available, I put everything together on a perfboard - added modified (shorter) steering arms Update April 6th 2021: - modified frame support 3 added --> needed 2x instead of original frame support 2 and 3 there are a few modifications (edge sanding + 2 screws on the very front axle) necessary to give the steering more room (pics added) new M4 ball joints: (needed some sanding, see pics) https://www.aliexpress.com/item/4001061838272.html External BEC is mandatory, I fried my (cheap) ESC because the servos draw a lot of current! External BEC I used: https://www.ebay.de/itm/DC-DC-Buck-Converter-200W-4V-40V-8A-Step-Down-Voltage-Power-Module-XL4016/162716874047?hash=item25e2ae753f:g:C7MAAOSwUwFZ5vb8 For turn indicator you can use something like this: https://www.ebay.de/itm/Orange-Blinkende-LED-5mm-Blinkt-Flash-1-5Hz-Diffus-E6-6/303730671714?hash=item46b7c24062:g:EgUAAOSwLFJfirta