This is Revision 1.3 of the 7x Stepper Driver. Added resistors on SPI1. Changed to new SWD format. Added protection against wrong PSU polarity. Moved leds into board. Major improvement on ground planes. Previous change on 1.2 was that I turned the Connectors around. I re-routed the entire module from scratch and created ground planes…
This drawing is an overview of the Hat’s in progress. A few is only on the planning stage, but most electronics is on prototype level and SW is coming on. Raspberry PI is the obvious core if I need heavier processing. Due to the nature of it’s SPI I can only connect one of these…
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…
This show the 7 x 5-Wire stepper with the intended connectors and an example of the stepper connected. I have 2 errors on this Hat – firstly I have the +V on the wrong side, so I have to turn the connectors around. I will just use straight connectors for testing. The second is that…