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[01:17:46] <rue_house> 800 rpm from a stepper would be fine
[01:17:51] <rue_house> I got 700Hz
[01:18:01] <rue_house> 210rpm
[01:18:45] <rue_house> 800rpm would be about 2.7Khz
[01:18:50] <rue_house> peak was 15Khz
[01:19:12] <rue_house> so I could do 4 microsteps and never hit anyones limit
[01:19:39] <rue_house> 2 bits would be easy
[01:20:11] <rue_house> well, this is unipolar, so not really
[01:21:59] <theBear> ahh unipolar, like that transistors that seem to work equally well either polarity
[01:24:21] <rue_house> I did my own stepper driver
[01:24:32] <rue_house> cause I dont want to use a tiny chip that cant dissipate any heat
[01:24:50] <rue_house> so it fills a 9x13cm board
[01:25:53] <rue_house> tiny13 for step/direction to serial, HC595 to break out into the 4 phases, uln2003 to drive 4 irfz44, and a LM393 to do current limit switching (with help from spare channels of the uln2003)
[01:26:48] <rue_house> an atmega8 is chpeaper than the t13+74595, but a) I dont have any, b) I really need to find uses for and dispose of these tiny13 c) the 74hc595 are amost free (7c)
[01:34:18] <rue_house> the '595 gave me the ability to not have to clobber the reset line of the t13
[01:35:00] <rue_house> I could also move the uc to another board and just have the 595
[22:01:55] <rue_shop5> ok, the fet disable works
[22:02:11] <rue_shop5> hopefully the current regulation isn't far behind