This draft illustrate a PWM module based on the driver of the motor controller we made earlier. We use a concept of a gate driver and 2 x HEXFET to create a Half H-Bridge. We will need 10V+ due to the gate driver, but we only need 1-3A on this one. I think it is…
Double click on the picture to see the larger version … The SIM800C uses a 4V PSU that need to support 2A. All the circuitry on top is PSU related according to reference – I have removed some, but need to see the PCB layout before I consider the rest. Also, I am not sure…
Just an early 3D model of the Ethernet Module including Ethernet, Wifi and GSM based network connections. I have to add the 3D modules of the sim card holder and antenna that also goes to the front, but I am running out of space. These modules are only 80 x 65mm, but that is in…
I wrote lengthy blogs about Plain syntax and concepts earlier this year and want to wrap up the specifications and get going. The challenge with pushing on ideas and concepts is that you start getting blind-folded and stuck as you push for results. This is why I prefer new concepts to mature because what seems…
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…