It is always exiting to receive PCB’s. I am looking forward to work on this one because it is a very small (40 x 12 mm) 3-phase Motor controller. It is designed to communicate using RS-X and control the motor in the background. The block diagram show the components on the board. Communication is RS485,…
I did earlier state that many of the STM32 series are pin compatible making it easy to scale up. I have to my surprice discovered that this is NOT true for STM32F405Rx versus other R series. I just mounted a F405 on a F103Rx design for testing and it did not work as expected. Paying…
This is Revision 1.0 of the R breakout boards. I already made Revision 1.1 before I received these because I realized I needed a few led’s on the board. This board can be used on several R size STM32 MCU’s. The board contain the MCU will all pins available, a SWD connector, PSU and a…
As mentioned before I am a big fan of STM32F105RB as the smallest MCU that I use unless package size is an issue. I have other preferences for LQFP48 and TSSOP20. What puzle me is a comparison between STM32F103RB and STM32F105RB on functionality and prices from AliExpress. I suspect that the reason for the low price on…
RS-X is easyIPC over RS485 using a special 4-wire cable and a timing protocol. Several modules are designed to be connected to a RS-X network as well as a series of infrastructure components needed to build an automation/robotic network based on easyIPC. easyIPC is about providing a plug & play network with open, secure communication…
This board uses a LQFP48 because I needed more pins and it extended the size to 50 x 15 mm to get everything in. It contains 2 x Stepper Motor Drivers and 2 x end point connections. This can operate 2 x 5-wire or 4-wire stepper motors. I have not decided on MCU yet. I…
I have a bunch of these that has been laying around for ages with the DIP version drivers of ULN2003, but I have never tested them. So I connected a STM32F030F4 dev board to the ULN2003 driver and tested a 4 step and 8 step algorithm. I have used quite a lot of steppers and servo’s…
Just fancied making a micro 4 x Servo controller. Each of the connectors can be used for Servo, RC Motor, Digital In/Out or Analogue in.
As mentioned in a previous post I could extend this to 8x DC motors. I realized that the screw terminals I used had a smaller 2.54 pitch version. Connecting 8xL9110 to drive 8 DC motors or 4 Stepper motors are easy and straight forward. This is a draft as I was keen on looking at…
I am quite found of these small boards so I reuse the MCU and RS485 interface on various designs. This one uses a ULN2003 to provide 7 PWM ports with up to 16V and 0,5A each. I use a 8 pin 1.27pitch connector. the 8th pin is V+, while the second row is all GND.…