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Title: ribbon riser recycling Post by: nerdralph on March 15, 2017, 02:33:18 PM I re-purposed a flaky ribbon riser for a molex-PCIe power adapter.
http://nerdralph.blogspot.ca/2017/03/riser-recycling.html Title: Re: ribbon riser recycling Post by: deadsix on March 15, 2017, 03:39:02 PM OT : Love your blog :)
Title: Re: ribbon riser recycling Post by: m1n1ngP4d4w4n on March 15, 2017, 06:15:50 PM Nice & interesting blog you got there nerd' please continue it's very informative ! ;)
Title: Re: ribbon riser recycling Post by: BChydro on March 15, 2017, 07:33:48 PM :O Points for ingenuity but is that safe?? A 6 pin PCIe plug should be able to handle 75w. Theoretically a molex can handle 11A per pin, so that should be fine, but I'm not so sure about that cheap Chinese PCB. Does it get hot/warm during use?
Title: Re: ribbon riser recycling Post by: nerdralph on March 15, 2017, 09:18:04 PM :O Points for ingenuity but is that safe?? A 6 pin PCIe plug should be able to handle 75w. Theoretically a molex can handle 11A per pin, so that should be fine, but I'm not so sure about that cheap Chinese PCB. Does it get hot/warm during use? As far as the connector is concerned (Molex part#45558-0002), it's rated for 8 amps per pin, or almost 300W when all 3 12V pins are connected. You make a good point about the PCB though, which isn't anything near 2oz copper (maybe not even 1oz). It's got a good low-resistance ground pour, but the 12V power trace is relatively small and therefore gets pretty hot. I'm going to shut down the rig and solder on a 18AWG jumper wire for the 12V pins. p.s. I've updated the blog post and given you credit for pointing out the issue with the PCB trace thickness. Title: Re: ribbon riser recycling Post by: 64dimensions on March 16, 2017, 05:59:40 AM Missing is the key question, what is the value of your time?
Let's start somewhere and assume that it took you an hour of labor to re-purpose this bad riser. If you cost $60/hr (labor + overhead), it was cheaper just to buy the damn part from amazon or ebay. Title: Re: ribbon riser recycling Post by: m1n1ngP4d4w4n on March 16, 2017, 06:59:10 AM Missing is the key question, what is the value of your time? Let's start somewhere and assume that it took you an hour of labor to re-purpose this bad riser. If you cost $60/hr (labor + overhead), it was cheaper just to buy the damn part from amazon or ebay. But alot less fun and you learn stuff ! |