Shared Projects by undef

Perhaps the Cheapest EVER way to get a 3 phase BLDC motor setup running - with a few extra wires and passives. Use each board for a phase - or make a classic H bridge with two of your PCB’s and have a spare half bridge lying around! Five bucks! Woo Hoo!!

D3 Bootstrap diode (1n4007), C9 Bootstrap cap (22uf). R19 Phase output resistor (for BLDC feedback & virtual ground). R9,10,11,12 Gate pullups/pulldowns as you measure apprioriate. SOIC 8 IR2110 - pin 1 denoted by Star.

Silk top layer markings: Phase/Vcc/Hi/Lo/Gnd. Staggered gate pin, Mask removed enabling Thickened Drain/Source (Phase) soldering.

Vcc needs to be 10-20v! Fet side voltages as per individual N Fet spec.

15mm equidistant spacing between the To220 mounting holes - fits lovely onto most old PC CPU heatsinks. Conductive fixing holes on each end are 4.2mm diameter within exposed 10mm pads. Soldermask removed so you can solder real copper wires on to bolster the current carrying capacity. 1mm pullback/pad clearance throughout. All gates commoned together - but easily possibile to use a razor to split out into two fet pairs or even four individual ones. You can’t daisy chain these pcb’s directly together edge to edge with bolts (for example to get 8/12/16 fet combinations) - but could be a great timesaver if you just need to keep swapping banks of blown fets out!!! Tested in the field. Enjoy!

MAX 7219 Breakout (24 pin Wide SO). Pin assignments as per manufacturer assigment - silkscreen on bottom. Make it cheap, quick and easy to reuse recycled 7 segment style displays in your projects.