I always suggest that people buy stuff the first few times from a supplier who can offer technical support or at least technical documents and one who is at least on the same continent as you.
These guys are the best. Notice they have three tables for low, medium, and high power drivers. And if you drill down you get spec sheets, CAD drawings, and sample code to operate them. https://www.pololu.com/category/11/brushed-dc-motor-drivers Read all the How-To about the product before you order as many times they have suggestions, not on the data sheets eBay is good after you have enough experience not to need technical details and you can just figure out how to use whatever they send you. On Thu, Nov 12, 2020 at 5:50 PM Dave Cole <linuxcncro...@gmail.com> wrote: > Gene, > > Where did you buy that H bridge board ? Ebay ? > > Dave > > On 11/9/2020 5:15 PM, Gene Heskett wrote: > > On Wednesday 28 October 2020 16:02:51 Gene Heskett wrote: > > > >> On Wednesday 28 October 2020 14:30:39 Chris Albertson wrote: > >>> I bit of information from Polulu's web site. They say.. > >>> > >>> "*While VNH3SP30’s over-voltage shutoff doesn’t activate until 36 V, > >>> in our experience, shoot-through currents make PWM operation > >>> impractical above 16 V.*" > >> Which pretty well explains my problems. > > Its taken way too long, but I may have found the driver I need. Miniature > > board and heat sink for about $13/copy. Has a pair of Infineon BTS7960B > > chips on a pcb about 1.5" square, rated for up to 45 volts and 43 amps > > for each chip and 2 make a full H-bridge. From the looks, its not the > > datasheet hookup, but has a 74HCT244 in tsop style for an input buffer. > > Looks like it needs a ground and 5 volts, and probably an enable input, > > and up and down pwms, mode 2 IOW. Needless to say, no example hookups > > are to be had. But I'm prowling around in googles output now. Found > > them: > > > > < > https://www.handsontec.com/dataspecs/module/BTS7960%20Motor%20Driver.pdf> > > > > Interestingly, this one is stated to only be good till 27 volts, not the > > infineon 45 volts. Bridge chips are labeled with an extra B. 2nd grade > > stuffs? Probably. I'll advise how it works when I get it wired up. > > > > Cheers, Gene Heskett > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
