Can bus expansion card updates and ideas

[Michael_Andrew_LaVig]

I have a slightly different application (galvanically isolated RS485 board), but I’ve been looking for connectors too. The KiCAD file of the CANbus board didn’t have any part number details that i saw, but the idea of having a screw terminal connector is very appealing.

Seems like most other projects have settled on a 0.1" pin-header type connector… here:

Another UART Module

I’m working on a serial communication module that should bring out I2C, SPI, UART, and JTAG and support the most common voltage levels. Unforturnelty, because of a design error, the level shifting circuit isn’t working. So far, the UART is confirmed working, so that’s a good enough reason to start working on REV2. Eventually, it would be amazing to have a set of modules geared towards electronics/embedded development; I see someone is already working on a Logic Analyzer [PXL_20220602_025049975…

and here:

UART Expansion Card

Now going to be 12-15USD plus tax and shipping. I’m waiting for all my patreons who wish to buy one at a discount get them and then I will begin public sale. [IMG_20220821_184527]

or a JST connector here (which might be the best option if in my view- 0.1" compatible but with a shrouded locking connector):

RS-232 Framework Expansion Card

For those wanting RS-232 expansion card, I’m placing my entry in the hat. This expansion ard is based on a classic MAX232 transceiver for RS-232 with MCP2221 doing the UART to USB duties. The final RS-232 signal ends up being around ±8V which is pretty much standard for such setup and well within specification (±3-15V). Card is of non-isolated so all ground loop warnings apply. However, considering vast majority of existing USB to RS-232 cables are non-isolated too, this is nothing new or unex…

I’ll probably end up moving forward with the JST for my board, for now…