Category: 12 x PWM

Hat With 12 individual PWM signals capable of 60V and 2A. Each equipped With an independant, high side current sensor and separate terminal output With PWM and Ground. Perfect for running small 3-Phase or Stepper motors With full current sensing.

12 x PWM Hat

  I have so many Hat’s by now that I try to make some systematic documentation on them. This drawing is part of what I call “Annotated Schematics” to document the design and collect notes needed for working on the Hat. This example is one of my more powerfully Hat’s as it contains 12 separate…

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PWM12 – Current Sensor

I have started assembling the first PWM12 board and this is the current sensor I use. It will probably work ok, but the circuit lack two important components. One a small capacitor between CSense and ground and secondly a TVS between the same. The reason is I could have needed those to protect the MCU…

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BasicPI Firmware Stack

This illustrates the BasicPI Firmware Stack in progress. What I always do in embedded applications is to make a “standard” main.cpp as follows: void AppInit() {    // wire hardware } int main() {    AppInit();    // start OS } A team I worked in years ago agreed on this standard so we should…

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12 x PWM Hat

 This 12 x PWM Hat have 12 x high side current sensors. The PWM driver have a separate PSU, DRV8313 is rated 60V and INA194 is rated -16 to 80V so they are not that easy to break giving the Hat a very decent protection level. A separate TVS and capacitor bank on motor PSU…

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3-Phase/Stepper/RPM Hat

This Hat was actually a challenge to route, but I managed it at the 4th attempt. I am quite happy with the result as well. Raspberry PI Hat Format STM32F405RG MCU, 32bit ARM M4, 168Mhz, 1Mb Flash, 196Kb SRAM. 42Mbps backbone network. ca 30Mbps With Raspberry PI. CAN Network USB Separate PSU for PWM 12…

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