I bought a few of the cheap Robotell USB-CAN Adapters fro Aliexpress and finally decided to use them on a project as I needed a low-cost PC-CAN Adapter. Someone will recall I made USB/CAN Adapters some years ago using STM32F105, but I had so much trouble with those that I never used them. I have…
CH32V307 is a RISC-V based MCU that is created by WCH and that got my attention due to it’s low cost – 3.- USD in quantity 1 and down to 1.9 USD from JLCPCB. I have read about RISC-V as an alternative to ARM for years, but I have not paid much attention to it…
I was warned ny JLCPCB that my boards had some strange pad’s – looking at KiCAD I notice the issue above. These via’s are set to have Pad on connected layers only and KiCAD screws up. If I click on the via it correct itslef. Will be interested to see if this board works at…
Illustrating a possible PCB bus board 90mm x 150mm. I have also played around with alternative sizes, but I like the small 25mm x 45mm and the scalability I got here. The drawback is cost as each module will need a 12.- USD MCU at core.
This just a mock-up of an actual module assembled from 7 IO modules using the later design. Size is just illustrative as I play around with ideas. I am waiting on project boxes and will adjust everuthing to that. So far I have only draftet connectors as 5P headers. I am thinking about doing CAN…
Sadly the headers occupy ca 10mm of 25mm, so to get Ethernet RJ45 fixed I needed 35mm width on the modules. The MCU module will be fine, but having two IO modules will require more space. 10mm extra is not the end of the world, but the design draft is also 4 PCB’s per module,…
I was recently asked to create a PLC in the form of a cable and the resulted draft is quite awesome. The design size I decided on was 90 mm x 25mm x 25mm. The reason for the 90 mm is tto have a fit for standard PLC boxes. 25 x 25 is a reasonable…
As you can see the Arrow to the right miss the Connection point as I resize that symbol. This exact bug was hard to understand because all calculations was correct as I examined the code. But, then I noticed that the line always adapted to the previous CP position as I resized the symbol. CP…
This shows the moisture sensor from my previous entry with one exception – I added the USB Serial port. I have used various serial ports for debugging in the past, but never the USB despite I have always had it on my boards (almost always) – I simply never took the time to figure out…
This block diagram only illustrate a few of the modules in the Abstraction Layer – loads of more will be added as needed. I started this library years ago so it has existed in various versions, but are re-designing it to be cleaner now. This is a C++ library designed to make coding of user…