Echopraxia Posted March 5, 2008 Report Share Posted March 5, 2008 Is it possible to run two cores off one power supply 9v 500ma? Would the power requirements change? I want to build a mb64 and mbseq v3 into one case and hopefully use one power supply. Quote Link to comment Share on other sites More sharing options...
/tilted/ Posted March 6, 2008 Report Share Posted March 6, 2008 Two cores from one power supply... yes.Two cores from on 9v 500mA supply... probably not.You may find that you need more current.The good news is that you can test your cores individually with this suppy, then try the two together, and if you run out of steam the cores (maybe one, maybe both) will simply reset.- Then you can go get a bigger supply. Quote Link to comment Share on other sites More sharing options...
nILS Posted March 6, 2008 Report Share Posted March 6, 2008 /tilted/'s answer is correct. Although you *can* run 2 cores on 9v 500mA, *if* you do not have a CS, LCD or anything else that eat up your amperage (mmmm amperage). As soon as a (backlit) LCD comes into play you'll want a more to have more current available. 1A seems to be a pretty decent amount for most midibox applications (w/o motors). Quote Link to comment Share on other sites More sharing options...
Echopraxia Posted March 7, 2008 Author Report Share Posted March 7, 2008 I wanna do a full cs for mbseq v3 with both lcds, all buttons, lights and bpm display. Then also another lcd and about 32 encoders for mb64. 1A should be ok for this? I read other threads that anything above 1A for MB is not recommended. Quote Link to comment Share on other sites More sharing options...
nILS Posted March 7, 2008 Report Share Posted March 7, 2008 Could you link that thread for us?http://www.midibox.org/forum/index.php/topic,10891.0.htmlhttp://www.midibox.org/forum/index.php/topic,10781.msg83081.html#msg83081 Quote Link to comment Share on other sites More sharing options...
stryd_one Posted March 7, 2008 Report Share Posted March 7, 2008 1A is the limit of the stock voltage regulator. You can use a different reg, they come in 1.5A and 2A. If you want to know how much is enough, read the datasheets for all your peripherals (LCD, LEDs*how many LEDs you have, segment displays, etc) and use a calculator :) If your LEDs draw too much, then you'll need to add components to handle the extra current such as ULN2003 or diodes. This has all been covered, try searching with some of those keywords :) Quote Link to comment Share on other sites More sharing options...
Echopraxia Posted March 8, 2008 Author Report Share Posted March 8, 2008 Thanks styrd. I'm still learning but that doesn't give me an excuse for not searching the forums harder. I am just glad that you guys are here to help. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted March 8, 2008 Report Share Posted March 8, 2008 Thanks styrd. I'm still learning but that doesn't give me an excuse for not searching the forums harder. I am just glad that you guys are here to help. Nah man, it's just a matter of knowing what to search for - I thought that a few juicey keywords might get the ball rolling :) Quote Link to comment Share on other sites More sharing options...
Peake Posted May 15, 2008 Report Share Posted May 15, 2008 Pardon my two cents...correct me if I'm wrong and I'll stop "helping". This might work.L78S05CV, IC REG POSITIVE 2A 5V TO-220 (and a heatsink like Smash TV sells). Quote Link to comment Share on other sites More sharing options...
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