Latest MegaDrum schematics. 32 inputs.

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Re: Latest MegaDrum schematics. 32 inputs.

Postby redbullah » Mon Feb 11, 2013 10:53 pm

dmitri wrote:Those links were created as an advice/pointer where it is possible to find components. The schematic has the most up-to-date list of components.


i'll create a new list according to the schematic then. an update to the list in the homepage would be good, since newbies like me likely use it to buy components... i'll post my list too anyways.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby marcjwebbmusic » Sat Apr 13, 2013 3:17 pm

hi there, after getting my pcb boards made and ready to solder, i have come across a small issue, once i drilled the holes for everything i have noticed that trying to solder to some of the smaller parts (r26 on the digitial board) the track has so little copper left that the solder seems to refuse to be soldered. if i open the KiCad files will it be possible to enlarge the pad size, if not would using a 0.75mm drill bit be better.

many thanks

marc
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Sun Apr 14, 2013 8:37 pm

marcjwebbmusic wrote:if i open the KiCad files will it be possible to enlarge the pad size

Yes, of course.

, if not would using a 0.75mm drill bit be better.

You can try but it all depends on your PCB making skills.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby marcjwebbmusic » Wed Apr 17, 2013 5:14 pm

hi there, almost done with the circuits, looking good, the o.75mm worked a treat, tidy precise solder joints now. i have notice red lines that look like they are just jumpers on the components pictures, are these literally strips of wire joining sections of the board together, or are they for something different?

thanks

marc
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Wed Apr 17, 2013 9:14 pm

These are wire jumpers, you have to solder them.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby marcjwebbmusic » Fri May 10, 2013 5:25 pm

With regards to the 10uh and the 1uf cap. I have noticed that one leg is longer ( for polarity ) however struggling to find which way round to place them. Please can I have some help.

Thanks

Marc
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Fri May 10, 2013 9:57 pm

Minus goes to the ground.
Plus goes to +5.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby marcjwebbmusic » Fri May 10, 2013 10:12 pm

I understand that but can not tell on the pcb which is which
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Re: Latest MegaDrum schematics. 32 inputs.

Postby dmitri » Fri May 10, 2013 10:15 pm

Trace the tracks to power pins on ICs or USB power pins. Or use non-polar caps.
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Re: Latest MegaDrum schematics. 32 inputs.

Postby marcjwebbmusic » Fri May 10, 2013 10:19 pm

Would the ic's be safe if I connect the USB cable and used a meter on the tracks without the caps in?
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