On Wednesday 28 October 2020 04:01:18 Gene Heskett wrote: I can't get anything but a little room heat out of the 420 watter. Reading the chip docs I get the impression there are needed control sigs that are not brought out to the edge of the board. Running at 52 volts in, nothing on the output, sink temps are 140F. So its running internally, nice clean waveforms at the output filter input, but not getting drive from the input terminals. Mute is on or something.
Another damned delay, till at least the middle of November from China. I bought 2 of the 8 transistor motor drivers for $28, looks like they take the same signals the seat motor driver takes, 2 complementary dirs and a pwm. Rated at 15 amps, and 55 volts max power in. it should drive a 4 amp motor from a 24v 350 watt supply, or a rectified and filtered dc from this transformer. I can adjust its output in 11 or 13 volt steps, lots of taps. But I expect we'll see if I live long enough to make it work AND use it. Grrrrr, not good for ulcers and whatever. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
