This illustration show the new PCB layout, but the old have the same capacitor options. Previously as I tested this mini driver I did not apply the capacitor and the result was 2 blown drivers. I actually believe that a large capacitor as planned is all that is needed to absorb the spikes that took…
This design have 2 PSU’s. One is the ANS1117 that takes up to 12/16V input and 0.5A. The second is the DC/DC on DRV10983 that delivers 100mA and allow the Circuit to be used up to 28V. I have connected both for now. The datasheet for MAX3485 indicate up to 200mA, but my own measuring…
This is an old Project some of you will remember. I use DRV10983 from TI to provide a micro 3P Motor Controller. The MCU is STM32F030F4 that also is pin compatible With STM32F042F6. The smaller F030 provide 16K Flash while F042 provide 32Kb Flash. I added a RS-X for Connectivity and Hall Sensors. The entire…
Still an early draft, but show the 8 RS-485 connectors at top/bottom. I only use right angle headers in the 3D, but they are 2.54 pich so they can be replaced with other connectors. I still have a few loose ends. RS485 circuit can be switched off into 3-state by setting RE High and DE…
This new Connectivity Module have 8 x RS485 connectors. I use the front for the antenna and USB, while top/bottom for connectors that most likely will be permanently wired. Some users would probably request both 4-wire RS422 and RS232 and I will make a board for those later. I also need a CAN board. As…
One of the challenges I have is the size of connectors in front of the modules. I am actually considering using Top and Bottom on the modules to increase connector space. Another issue is that the screw connectors used on the RS485 board below is not really operational from front alone. Looking at the…
This is a classic RS485 circuit that I realize is not that good. It works fine, but it requires that ground always is included because of the 12V diodes. This simplified circuit is in many ways better as we actually can use a twisted pair only. This shows a none-isolated RS-X port. I also drag…
This draft will give me 6 (8) RS-X ports. 6 if I use the backbone and 8 if I use this stand-alone. In addition Ethernet, Wifi and Bluetooth as well as USB. RS-X Port is 4 pins with 12V and RS485 differential signalling. Basically it feeds 12V Power to the RS-X devices. I like playing…
I drafted a GSM/Ethernet module as well as a 3xGalvanic RS485 earlier, but I am toying with the idea of attempting a PLC Module with STM32F405 using ESP32 for Ethernet/Wifi and 4-6 RS-X ports. 4 if used as PLC-module, 6 if used stand-alone. I have also 2 CAN ports if I can find space/pins for…
I need a few C/C++ components to implement the Plain VM, one of them is a RTOS . I wrote my own RTOS that runs on both Arduino, ESP32, STM32, Windows and Linux years ago. It is a simple linear scheduler. I found it quite handy even on Windows applications as it scale better and…