Just got my latest order, 2 more gridseeds. They didn't come with power pigtails, but I figured I'd plug them in to my powered USB hub and see what happened. cgminer-3-7-2-gridseed detected them automatically and they started hashing away. cgminer detected them, but they show 0 WU after 10 minutes. The green lights blink, but no red lights like on my working units. The fans aren't running, but I'm told that doesn't matter in scrypt only mode.
Do these no longer ship with power pigtails? Is it official that it's safe to run them in scrypt only mode without the fans?
They still need external power even with a powered usb hub. It will show up in cgminer but it's not hashing. Gaw sells power adaptors and cables. For just two miners you could get a couple of cheap 12V 1A adaptors from ebay like this
http://www.ebay.com/itm/271442451746?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649I wouldn't get those specific ones: "Output: DC 12V, 1000mA. (Recommend the use of current is less than 1A, otherwise easily damaged)".
If say only 0.5A is safe on those, that's 6W. Get a 12V adapter with at least 2-3 amps available I'd say.
I'm not an expert, but if the gridseed needs .5A then it doesn't matter if the PSU is 1,2 or 3 Amps, the gridseed will pull what is needed not more. With the fan on if I remember when I got my first gridseed it was just under 10 watts which is why I suggested the 1 amp. Again I could be wrong, but for a single gridseed I think 1000mA is enough. Gaw sells them (or used to) so safest bet would just to buy from them if in doubt
GAW no longer provides power connectors with gridseed pods, and it is correct that single pod needs no more than 10 watt when in scrypt only mode (typically 7-8W with fan, 6-7W without, with VMOD1 and disconnected fan it draws ~9W @ 950 MHz, 9W = 12V * 0.75A). I run multiple gridseeds off brick style power supplies with splitters, 8 off 8A brick and 4 off 5A brick (should be able to do 6, it's just that I got bunch of 1 to 4 splitters) in either case brick is warm to the touch, not hot, and gridseeds are happy.
One amp PSU will NOT power two gridseeds (I tried
).
Search eBay/Amazon/meritline/dealextreme etc for 12V CCTV splitters (you need 2.1mm diameter barrel connector), eBay/meritline/dealxtreme route is cheaper than anything else. There are 1 to 4 splitters available for around $3, and 1 to 8 for $5, oftentimes with free shipping and even for less if you are willing to wait for delivery from China. Also on ebay I saw bundles ob brick PSUs and splitters.
