Mode Zero

Awesome work Tobe. I'll have to order some from you in orange to duplicate the RS Systems 2 servo brick as used in the RTF Hobie Hawks!

Jay

Very nice work

Tobe:
Are there any alternative solutions to the electronics when making a tandem servo other than 2 Arduinos and 2 DRV8838's?
Thanks,
Wayne

Hi Wayne,
one Arduino is more than enough but you still need "2" h-bridges that could be 2 of the classic DRV8838 however there are "2 channels" one like the DRV8835.
I might still have a few boards with the dual amp somewhere if you are interested.
PM me and we will see how I can help you

Are there any circuit diagrams and sketches available for using one arduino and one DRV8835?
Thanks,
Wayne

Hi Wayne,
I have designed several proper circuit board for the servo amp utilizing a ATMega88 a 16mhz resonator where the final version uses a DRV8835 as it's much cheaper and that is what you see in my DIY. Schematic wise it's mainly as published in the beginning of this thread but with the DRV8838. I have available boards and if you PM with a proper email adress I will share a suitable sketch and some instructions. The sketch will tell you how to connect in the comments between the DRV8835 and the ATMega if you like to experiment.
It's not my intention to share any files of any of my boards either schematics or Gerber.

Hi Tobe:
I finally got caught up on my 3D printing and printed some ABS ProPo Servo parts for the Boards that you sent me. Thanks again for the help with the boards and MiniCore programing. See attached proto of a few of the completed ProPo's. Fun Project!
Many thanks,
Wayne

I thought I would post a few photos of a Propo with a DRV8835 mounted on top of an Arduino Pro-Mini. Pins were reassigned in the Sketch to allow 3 of the 4 PH/EN pins to line up. Thanks again to Tobe for his guidance.