Hi! Love this project and am getting close to getting this ready to load software & power up. Some questions:
When I connect my NyBoard (v.2) on top of the the y1Pi arms, as shown in the animations, one side of the Pi can't fit to be clamped by the Pi Stand. Below I've taken photos showing where my setup gets stuck. I was going to bend things, but my board looks different from the one in the diagram. Should I try prying back the part on Nyboard that I've circled? I don't know enough about electronics to know if there is something I should try to jiggle and unplug/remove or not.
Also: I'm not sure exactly how the Pi and the Nyboard are to be connected. The Google Doc instructions mention: "If you plug Pi into NyBoard's 2x5 socket, their serial ports should be automatically connected at 3.3V.". In the photo below I've positioned the two-row, five pin header that came with OpenCat, and put the end of my Pi on top of it (note, this side will fit with the Pi Stand, the ill-fitting part is on the other side). Should I solder the header pins to the underside of the Nyboard? and if so, is this the only connection between the Pi and the Nyboard?
Finally - I've seen the joint map pin diagrams in the docs, as listed below, but I'm not sure how to hook up each servo to the respective pins on Nyboard. I'm so sorry if I'm missing something obvious in reading this. I'm a programmer, but new to electronics. I've built a two wheel / caster rover with a Pi and MQTT controlled from a Swift app, but this is the first time I'm jumping into something this complex & it's proving to be a good learning experience for me.
Any explicit help on how to advance (especially without damaging anything) is much appreciated. And Rz, congratulations on your excellent work. This really is a beautiful project and one I hope to recommend to many others. Thanks! John
Great thank you @Rongzhong Li! One final question, any problem with using an RPi 4B?
@D L the link in your comment (https://www.petoi.com/forum/clinic/placement-of-raspberry-pi-3b) goes no where. I am looking for any info on how to link an RPi to the Nyboard.
This was very helpful. I think I've got the wiring figured out now. Thanks!
The RP3 does hit the Nyboard because the pins are too high. Here is a discussion and fix.
The motor wiring was a bit confusing, so I wrote my own. Here is the description. Consider the table to be looking from top, left and right to the Nyboard, with Nybble facing as per the picture.