Fail ! 🙂 I made a mistake on the ISP port: switched arduino pins with atmega pin number :-[
I will try to correct this plus a few minor things and reorder a new batch before chinese new year
First time I solder atmega2650, it's a pain: 100 pins on a 14x14mm chip..
Boards and stencil are here, footprints looks good.
Next step: smt soldering and test of the arduino
https://anninrobotics.com/wp-content/uploads/2025/07/AR2-from-switzerland_24.avif
Wow. I love the idea. So to confirm this will interface the motor drivers to the power supply & arduino.
I like the idea of using a micro usb. That is fantastic. At some point you should upgrade to USB C 🙂
Also, what are you thoughts on having space for Joint 7 (horizontal travel pack)
Beginning "real world" things
PCB are on the mail.
https://anninrobotics.com/wp-content/uploads/2025/07/AR2-from-switzerland_23.avif
I'm almost done:
- added spare digitale and analog pins to RJ45 connectors
- added endstop status leds
- corrected drivers wiring
- added SPI port
- switched to micro USB
- labelled everything and a bit of cleaning
https://anninrobotics.com/wp-content/uploads/2025/07/AR2-from-switzerland_24.avif
Almost done.
I need to add 2 RJ45 with a few spare digital and analog pins.
https://anninrobotics.com/wp-content/uploads/2025/07/AR2-from-switzerland_25.avif
Still WIP
Mega is in place. I'm using 90° XT60 for voltage supply in the bottom of the board
https://anninrobotics.com/wp-content/uploads/2025/07/AR2-from-switzerland_26.avif
