This is the PCB for my switched PSU. It takes 40V in and can be made to produce 3.3V, 5V, 12V, 15V etc. With Pictures you loose a bit feeling of the actual size, so I put a TO247 transistor next to it – this is the smallest PCB I have made so far. It…
This is the 3-port RS-485 Hat with full isolation. Kind of cool with a black PCB. I have an earlier 5 port (3 x RS485 + 2 x CAN), but decided I needed a isolated version for RS-X since I plan to deploy it with long wires.
Finally got the rev 1.2 of the Rx breakout board. This will work with both STM32F1xxRx and SRM32F405Rx. It also add a led and space for a proper x-tal.
This analogue input module uses a ADS1256 that allow 8 channel input with 24 bit precision and 30Kbps sampling rate. With a programmable gain amplifier 1:64, programmable filter and support for single or differential inputs as well as calibration this board can cover most ADC needs. The input here can be 8 stand-alone channels or…
This illustrate the Raspberry PI connectivity board. The PSU on top can be switched on/off so we can reboot RPI. The actual RPI will connect using a 40 pin Connector. I am not sure about the mechanics yet, but I am considering mounting it so it’s Ethernet and USB sticks out in front. The adapter…
This is a draft of the the stand-alone GSM Module designed around the SIM800C module. I still want to see if I can get this into the Ethernet module, but made the diagram above to illustrate the content. The primary interface to the MCU is UART + some GPIO. This uses the AT command set…
Looking at SIMCom support for the SIM800C I must admit that they impress. I had to register on their site and after that I have Access to 20 Application documents, AT commands, certification documentation and updated hardware design & user manual. I have a dev-kit on it’s way + a module, also a devkit of…
This board enable 3-4 RS-X networks with full isolation. We connect 2 x RS-X to the backbone and 3-4 (a total of 5-6 UART) to external networks. In addition I want to add RTC and SPI Flash if I have pins & space. The red box on RS-X Ex mark that these are galvanic isolated…
Right now I am waiting on heat sink material so we can start testing the regulator with 5-10A continuous. I have done a few tests without and managed to burn transistors. My small fan’s do help a lot, so I expect a combination of heat sinks and fan’t to do Wonders. Heat dissipation is the…
Looks like the GSM module will be added to the Ethernet Module. Found several modules in price from 1.27 to 4 USD. Basically UART operated with support of GSM + GPRS, TCP/IP, UDP/IP, SMS etc. The cheapest kit is data only, but some of the others include voice as well. More important is that datasheets…