Quote from: vapourminer on August 29, 2013, 01:48:49 AM

this is the best read ever here. only other one that comes close is the "pictures of your mining rigs" thread. Kudos!

wonder how easy it would be to just whip another simple board up with the power and freq generator and wire it to a stick (or possibly multiple sticks).

ie, something external to the stick (with its own power supply and signal generator), with leads that you just solder to the stick(s). just need to cut some traces on the stick(s), solder some leads, pull some parts and off you go. something you could do fairly easily to a stock stick with no mad scientist skills needed. Im thinking 555 timer , LM317/mosfet skill level. (not those exact chips maybe but you get the idea)

course, need some cooling mods but thats easy compared to the work youve done.

My though was to just buy dc-dc converters off eBay, it is going to be hard to make a power supply that will work at these low voltages and currents, be cheaper also I think. If you did have many sticks you could use one clock and buffer it with like an 74act14 or something maybe. These make work for a power supply. I don't like the fact they are using aluminum caps but it is $7, plus I don't know how efficient they will be all the way at one end of their output range, might get some to test with.

http://www.ebay.com/itm/180824739993?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Quote from: Bluestreak66 on August 29, 2013, 03:27:53 AM

I'm curious as to how much of an effect cooling would have on stability at those high frequencies? My suspicion is that those voltages could be a bit lower starting @ around 20Mhz if better cooling is implemented. Not that it really matters because there is no practical way to power it. I do have one of the AOZ1036PI chips I had contemplated epoxying a thin copper sheet in the pad area so that it contacted the bottom LX pad then the LX area on the board. That chip is rated for 5A and would otherwise be a direct replacement, although the inductor may need to be swapped out as I'm not sure what current it is rated for. That may be out of the scope of some but it's an idea.

Anyway, Great work and thanks for posting up your results. I can confirm that your results match mine @ 14 16 and 18 as those are the one I've tried. I haven't had 20mhz working yet.

Yes I am curious to, I think it would drop the voltages some and I am going to try to work on it a little more. Interesting idea on the regulator, I did look at those as for the stock inductor it might only be 2-3A I mean they most likely just cut it close.

Edit - well I removed the thermal pad and used heatsink grease and now my errors dropped from 5.5% to 1.2% so a foolish mistake on my part not to just do that in the first place. Still has the solder mask of course.