Connecting Raspberry Pi 3 to Einsy headers
Hi everyone, hi Prusa (empolyees and Joseph:-))
is it official supported to connect the raspberry pi 3 the same way as one would connect the raspberry pi zero w. For example using cables that is routed outside the EINSY cover?
I mean with all pins - drawing power from the EINSY. Does the EINSY supply enough power?
Of course one could only connect the (common) ground and power the Pi via USB - but it would be way cooler to not have to use an extra USB power supply.
Best regards!
Re: Connecting Raspberry Pi 3 to Einsy headers
i would like to know also, as i will be using a pi3 b board for octoprint, and am hoping to make a long jumper cable with the same connection to the einsy board as the pi zero, just remotely mounted. thx
Re: Connecting Raspberry Pi 3 to Einsy headers
Why wouldn't you just use USB then?
Re: Connecting Raspberry Pi 3 to Einsy headers
Why wouldn't you just use USB then?
It's nice not to need a second power supply for the Pi, as said in the first post:
but it would be way cooler to not have to use an extra USB power supply.
Re: Connecting Raspberry Pi 3 to Einsy headers
I would be willing to bet a medium sum of money that the Pi 3 will run perfectly fine on the Einsy's 5V regulator. It's configured for ~2.4 A which should be plenty as long as you aren't running a touchscreen and bench-marking while overclocked (probably don't do any of those things individually).
Re: Connecting Raspberry Pi 3 to Einsy headers
On Twitter under #mk3 someone is planning to sell that cable soon for 8 bugs 😉
Re: Connecting Raspberry Pi 3 to Einsy headers
Still hoping for an official: "no problem connecting a Pi3 to EINSY the same way as Pi zero" or a "DON'T CONNECT THE PI 3 THE SAME WAY AS PI ZERO"
😀 ❓
Re: Connecting Raspberry Pi 3 to Einsy headers
Jo said you could do it in one of the interview videos. He said the only problem is it won't fit in the Rambo case.
Re: Connecting Raspberry Pi 3 to Einsy headers
maybe you haven't gotten your printer yet... i don't see how even a pi would fit inside there. the wiring coming in from everywhere fills the case.
Re: Connecting Raspberry Pi 3 to Einsy headers
The Pi connects to the back of the board, this why the long pins are required.
Re: Connecting Raspberry Pi 3 to Einsy headers
The Pi connects to the back of the board, this why the long pins are required.
how about a side view. I am looking at the cable and trying to figure out how it would fit (i have limited pi knowledge) I hadn't seem the pi 3 board in long enough that i forgot there was a header there
Re: Connecting Raspberry Pi 3 to Einsy headers
Of course the Pi3 does NOT fit in the case:-)
But on the backside of the case there is a slit where one could easily put trough cables (single or flat ribbon) to connect the Pi3 which would sit OUTSIDE the case. I guess that slit is exactly for that and of course to bring the raspberry Pi camera cable out of the case if one would choose to use cam on the zero...
But that is not the point! My point is about power: The Pi3 needs more power to even boot correctly.
I know that Joe mentioned the Pi3 in a video (months ago) - but the current manual talks about Pi zero only. I do not want to void my guarantee by drawing to much power from the EINSY Raspberry Pi header.
Re: Connecting Raspberry Pi 3 to Einsy headers
According to this article https://www.raspberrypi.org/magpi/raspberry-pi-3-specs-benchmarks/
Raspberry Pi 3 consumes about 580 mA under load.
The voltage regulator on the EINSY is a LM25011 from Texas Instruments. According to the datasheet this is a CV/CC switching regulator which can supply 2A. This should be enough for a Raspberry Pi if you dont plug in power-hungry accessories (hard drives, large displays, ...). And even if you exceed the limit the regulator will switch to constant current mode -> demanding hight current will not damage the regulator but make the voltage collapse.
So it should be safe to plug in a Raspi 3 to the EINSY board since the 5V stuff on the printer itself (LCD, sensors, fans, microcontroller) should be well below 500mA.
Re: Connecting Raspberry Pi 3 to Einsy headers
So i can add my experience running a pi 3b through a header cable to the back of the Einsey. I decided to try this hoping to incorporate the developed work that will come to not only use the UART0 serial from pi but the features that will use gpio 22 and 23. I didn't run 5v from the Einsey and powered from an external source because i was afraid i would draw too much from the regulator. I went through all the recommended process to disable bt etc to make this work. I found that serial through this longer cable directly to the header run about 4 ft suffers from interference. I used shield cable and also drained one side of the cable and also put chokes on the cable to try to eliminate this. What is happening is that i can make a connection and start a print and watch the terminal. Every once in a while it would report a line discrepancy and re transmit the last line bid did not see a lot of errors if any. The print would continue for a while then stop and the terminal would show odd characters. It never continues from there. At this point i have gone back to usb and have not had any issues with usb. If anyone has any other thoughts that would be great.
Re: Connecting Raspberry Pi 3 to Einsy headers
Hi guys first post,
I've been toying with an idea, let me know what you think.
Could you install a pi0 on on the accessory port and run raspbian on it and use it as a slave. Could also attach a pi camera to it and set it up as an IP cam/mpeg streamer.
Then use a master Pi3 (or 3 plus) running the GPIOzero library to read and write directly to the pins on the pi zero attached to the Rambo. you would then have enough horsepower to attach a touchscreen to the master pi and together with portable power supply. This would become a wireless control tablet as well as the octo print server for your printer.
Just something I've been tossing around in my head on coffee breaks at work, let me know if I'm way off the mark though.
Re: Connecting Raspberry Pi 3 to Einsy headers
Has anyone figured this out? I installed the Pi0-w on my MK3, but it just isn't really powerful enough for camera and other plugins. The Pi0 is much slower than the Pi3 and is quite noticeable after using a Pi3 on my other printer.
Re: Connecting Raspberry Pi 3 to Einsy headers
I would like to ask the same thing. Can the (base on currect knowledge as for end of August) Raspberry 3b+ be installed into the Prusa mk3 power supply?
Re: Connecting Raspberry Pi 3 to Einsy headers
I've built a connector cable between my raspi 3b+ and the Einsy board and I use a raspi camera. No problems till now.
Re: Connecting Raspberry Pi 3 to Einsy headers
I've built a connector cable between my raspi 3b+ and the Einsy board and I use a raspi camera. No problems till now.
Hi Peter,
Is the power required for the RPI3 B+, including attached peripherals (camera), supplied by the EINSY headers?
Or did you source the power elsewhere?
Kind regards & Happy Prining 
Thijs
Re: Connecting Raspberry Pi 3 to Einsy headers
All power comes from the Einsy headers I don't use/need a secondary power supply.