This is a 5 port communication Hat mounted on a Raspberry PI 3. It contains 3 x RS485 and 2 x CAN ports. The design is not new for readers of this blog, but it is actually the first time I assemble rev 1.1 – just before I am about to order rev 1.2. The…
I am just assembling one of my first Raspberry PI Hat’s With a 3 x RS485 and 2 x CAN for testing. The circuits below is what I used at the time. Rev 1.2 will use 3.3V only and remove the components crossed in Red. It is a common error to add protection towards ground,…
Since we talk about galvanic RS485 & CAN Adapter’s I guess it is time to visit this project as well. The universal adapter below was something I started last time I needed CAN. This adds W5500 and ESP12-E + NRF in addition to CAN & RS485. I never made a revision of this Board, but…
This is the rev 1.2 of my 5 port Hat with 3 x RS485 and 2 x CAN. I never ordered this PCB because it is only mechanical changes from Rev 1.1. But, using this or a galvanic version with Raspberry PI is an option for my CAN Adaptor plans. The advantages with this is…
This is the same drawing as the previous post, but I added the TF Card option. Basically this is a small mini-computer Complete With display, keyboard (in the display), Wifi, Storage etc. Just for the record it actually got more “disk” and RAM than my first IBM Compatible PC. I have never done a TF-card…
It exist a project that simply add a CAN Tranceiver to a special ESP32 dev Board – called CAN32. This uses the CAN on ESP32 and provide a Wifi based CAN Interface. I have a few CAN breakout Boards and Nextion displays so I want to assemble one of these. The main drawbacks With this…
I need a CAN adapter for a special job and decided to build my own. I use ESP32 to get Wifi, Bluetooth and USB Connectivity, but I decided on adding a STM32 to get dual CAN Connectivity. ESP32 do have an undocumented CAN port as well, but I assume ExpressIF have their reasons for hiding…
My previous DRV8313 design used the larger 64 pin F105/F405 MCU and a more complicated sensor design. What I could do is to use the smaller F303 that is 48 pin and fokus on hall sensor driven motors to get size down. The issue is that current sensing is very difficult/unreliable for small motors on…
As I wrote earlier my mini BLDC Controller who support 28V and 2A is basically to powerfully for the job. The motor I Control uses ca 250mA on 12V etc. I used DRV10983 for the job, but I also designed a far more advanced BLDC Controller with DRV8313 earlier. That ended up “larger” as it…
This is a classic N20 DC motor With gearbox and a Encoder. I made a micro stand-alone Control system for these, but I did not support the Encoder. The Encoder will send pulses back as the motor run indicating speed and relative position allowing us to use this as a small stepper motor. My…