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About velinoff

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  1. Lee,may I ask a couple of question about the modded spc900?
  2. Hello everybody! I would like to share my experience with AstroEQ and especially to thank Tom for his contribution to DIY astronomy. A couple of months ago I've decided to equip my CG4 with AstroEQ using Arduino Mega as I had one laying around. Bought cheap A4988 and NEMA 17 motors of Ebay and MXL gears from beltingonline( by the way they've got ready kits - which are cheaper than choosing separately pulleys and belts). Took me about 2 hours to breadboard the schematics and upload the sketch and - Miracle! Everything worked from the first time! Had a little trouble running it under Linux mint (INDI EQmod and Kstars) as every time I plug USB or sd card -have to change the link to the serial port . I'm still trying to sort this out. Under Windows - no problems whatsoever. Managed to do pulse guiding with 114mm Konusmotor 500 as guiding scope and Logitech 4000Pro(found it 2 weeks ago at Picks Cottage Car boot sale for 50p - luckily it has sony chip inside!!! ) .I've let it go for an hour the worst correction was 3 pixels at RA( 6 pix peak to peak) - have to make some calculations to see what is the error in arcsec - anyway its impressive! Last week decided to change design from bread board - couple of fails as I've tried to change the pin mapping( The serial communication appears on RX0/TX0) so had to settle for the default pin mapping.In all redesigning and fitting in appropriate case I've managed to disconnect the motors before removing the Vmot :both drivers expired. Now I am choosing drv8825 - I saw couple different designs on Internet and particularly one that is branded "Design by Kliment". It has big ground pad and chip on the bottom. It supose to be direct replacement for A4988 but it has internal logic power and the pin is used for output Fault... If anyone had experience with one of theese any feedback will be appreciated.
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