Dual 40amp motor drivers with integrated Arduino and inputs.

Hi guys, am new to the community and just wanted to see if this was something that anyone would find interesting, I designed them to drive industrial lifts (which use 2 x 24VDC actuators) so they can drive 2 motors up to 40v in both directions and with full high frequency speed control. They've got two N-channel mosfets for driving additional DC loads, original use case is a 24v buzzer and an electromagnetic latch. It's also got 8 inputs exposed that can take inputs at up to 24v.

The motor drivers are 4 x BTN8982TA which are the modern version of the obsolete BTS7960's that you see on the 43A IBT-2 units that are pretty popular these days despite their shorting heat sink issues.

It's driven by an Atmega328 (same as the Arduino Uno) so it's pretty accessible to code, I didn't include USB circuitry on it but there's an exposed serial header for one of those ubiquitous FTDI USB->UART converters. The one (known) cockup I made in the design was accidentally flipping the ICSP header which is why the pins are sticking out the bottom rather than the much more logical direction of up.

Original run was a pretty short one of only a few dozen units that I hand built and I'm tossing up whether to do a full production run. The heat sink is way too big but was the best fit I could find off the shelf without shelling out for custom aluminium.

oops, screwed up posting the images

nice! are you a professionnal electronician?

There are few drivers with this chip. I found only one:
https://www.infineon.com/cms/en/product/evaluation-boards/dc-motorcontr_btn8982/

www.farnell.com/datasheets/1862004.pdf
Brushed DC motor control up to 250W continuous load
––8–18V nominal input voltage (max. 6–40V)
––Average motor current 30A restricted due to PCB

how much are they ?

Mechatronics Engineer, just finished automating the production line for an insect protein farm and am doing contract work now. Also teach electronics to kids in Hong Kong.

I think you won't see these drivers show up in cheap, mass production boards for a while yet. Not until the cheap stocks of the obsolete BTS7960 start to run out. The BTN8982TA is just the newer, slightly more efficient version from the same mob.

I did these on contract to a company that does industrial lifts at AU$85 each. I've got 4 left from that run if anyone does want them at the same price. I'm hoping to get some interest together to do a bigger run and outsource the assembly so I can make them cheaper next time round (and not have to assemble the buggers myself).