Arduino for STM32

The problem are the reverse polarity spikes... I deal with that more than a decade ago when I start with the electronics of the telescope... a single 12v impulse going to a low impedance coil can produce a 700v+ back spike!... It is literally Tesla stuff!!! I remember the "Electric sparks"...

well all was good in theory BUT surprise! both grounds on the LV8729V modules are already shorted!!! so no matter if I separate them the problem will persist... A similar driver the DRV8825 has the same "mistake" the 2 grounds are shorted... At least I was lucky to test them before burning...

but the voltage Im talking about is exactly the motor supply... so as u pointed it is important that the DC-DC converter must be near to the motor capacitor

the unit I have maybe works... it is a 12v to 12v non regulated converter of very low power rate (B1212S-1W) I test it with 3.8V in and it gives 3.82v out (so not exactly 1:1) of course I need a 3:1 voltage divider in the input to not burn it with 28v... MAYBE it works. the only doubt I have about i...

thanks... so as long as I do not connect motor ground with logic ground maybe it will be ok? On a second review of the first pdf that I refer to it is CLEAR that logic and motor power supply can NOT be the same (line & ground). :oops: I will re read the datasheet to see if there is any mention a...

so the ground is what kills the MCU? It is relatively simple to isolate the Motor ground but if I dont share the logic ground with the MCU the signal do not work. In the other hand if I isolate the MCU with optos the ground of the motor can not be shared with the optos secondary part? For example th...

well I start using the info on this page: https://wiki.fysetc.com/LV8729_V1.0/ here is the complete drawing... https://mega.nz/file/VPACmDYR#XC4JSNDjM9XqCuoVlO1-tUCSWLTeYo_dmjFj0ESoaTs To shut down the system I just cut the ground so the connector to do that... grounds are all connected. The system ...

Hi Im using a LV8729 @ 28V with a STM32 pins connected directly to the inputs of the LV8729 (no resistors or anything else) and of course I burn several STM32 units from Robotdyn... it hurts! And yes I need the 28V for hi speed on a big Telescope control... My question is Do I need to use opto coupl...

yes I try it but it seems that the user setup file config is not just un comment a single line....