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Date: | Fri, 27 Apr 2012 10:14:41 -0700 |
From: | Colin D Bennett <colin AT gibibit DOT com> |
To: | geda-user AT delorie DOT com |
Subject: | Re: [geda-user] board fab |
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On Fri, 27 Apr 2012 09:50:26 -0500 John Griessen <john AT ecosensory DOT com> wrote: > On 04/27/2012 08:41 AM, Colin D Bennett wrote: > > Oliver Schinagl wrote: > >> Seeed charges 9.99 USD for 10x 5cmx5cm. So that's 50 cm^2 for > >> > 9.99. That's 80 of those mini pcb's. Even if I break 50% > >> > from not being able to cut properly, I still have 40 PCB's > >> > for 9.99 with free shipping (I think, but even so). > > I didn't realize you were making quite a few boards. > > > > Wow, that is cheap. That comes out to only US$0.26/in^2. > > How is the quality? I might use that for larger boards or > > bigger runs if it is decent. > > Wouldn't it be 2.54 x 2.54 = sq cm/sq in = 6.45. Then the 50 > cm^2 ==> 7.75 sq in which means the price is $1.28/sq. in. The Seeed Studio Fusion PCB service <http://www.seeedstudio.com/depot/fusion-pcb-service-p-835.html> price is for ten boards. 10 USD / (10 boards * (5 cm * 5 cm)/board) or about 0.2578 USD/in^2. > dorkbotpdx's medium run deal is: > http://dementeddiode.org/blog/2011/03/a-medium-run-service-for-open-source-hardware/ > "multiples of 10, and with a minimum of a 150 square inch > another beta run on May 9th" "$1.30 a square inch. Postage > included, and no setup fee. The first “beta” run would be $1 per > square inch." > > so they would sell the same area for $7.75, $10.07, but those > areas don't make minimums. > > It's a similar price. The boards are tab routed, so edges will > have a rough spot where a tab is broken off. True. Taking a large, flat file to the edge really improves it, and it's no problem for a few prototypes, but for more than a few it is tedious, so if you want clean edges it may not be the best choice. > I've had good results with myropcb.com, where I could add gold > plated edge connectors and still be under $1/sq in. with no rough > spots, and packaged in shrink wraps of 25 each with silica gel in > them. The turn time was less than 3 weeks -- 1.5 or 2 wks I > think. Payment was by paypal, no need for a wire transfer, Hong > Kong dollars or RMB money changing. Those prices were 14 months > ago, might have gone up. Good to know about myropcb.com, I will take note next time I have a medium run to do. Regards, Colin
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