"Brushless" / Induction Stir Plate

I've tried various ideas for obtaining or winding coils for this project but none of them has worked out that well. I've been working on another project to make an old GPO 700 series telephone ring under the control of an ATtiny24. As a couple of sets of electromagnets for a Series 700 have appeared on E. Bay recently, I thought I could "steal" the electronics from the other project to use on this.

A simplified version of the board with the microcontroller and a set of LEDs to stand in for the actual coil driver.

Next step is to build a 74595 shift reg board (configured as a stand in for the MIC5841 to be used in the final project) with 6 LEDs to stand in for all 6 coils. Then the shift-register code can be written (it shouldn't need altering for the real-deal).

The software is over at GitLab:  https://gitlab.com/edgeeffect/attiny24a-mic5841-magnetic-stirer/tree/4-LED-test

The plan is to improve on this.