A lot of people have been asking about how much these boards cost, so it seems worthwhile to post a little something to clear this up.
I’m not looking to make a huge profit of any of this. Actually it just makes me happy that anyone is interested at all in what I’m doing. So rather than keep my costs under wraps and provide you with a blackbox number, here is the actual amount that it costs me to build one of these boards, by component (in USD):
|Component||Vendor||Vendor PN||Cost ea||Qty||Ext Cost|
|PCB, MM PCB10002 REV B, Simple iPad Breakout||OSH Park||PCB10002 REV B||3.17||1||3.17|
|Connector, DisplayPort, SMD, Molex 0472720001||Digikey||WM19271CT-ND||5.30||1||5.30|
|Connector, FFC, 51 Pos, 0.3mm Pitch, Molex 5022505191||Mouser||538-502250-5191||5.56||1||5.56|
|Capacitor, Alum Elec, 100uF, 10V, TH, Panasonic EEUFR1A101||Digikey||P14373-ND||0.33||1||0.33|
|Diode, Schottky, dual common cathode, 25V, 1A, TO-261, NXP BAT120C,115||Digikey||568-6921-1-ND||0.77||1||0.77|
|LED, Green, SMD 0805, OSRAM LG R971-KN-1||Digikey||475-1410-1-ND||0.08||1||0.08|
|Resistor, 100 ohms, 1%, 1/10W, 0603, Yageo RC0603FR-07100RL||Digikey||311-100HRCT-ND||0.10||1||0.10|
|Resistor, 100 ohms, 1%, 1/16W, 0402, Stackpole RMCF0402FT100R||Digikey||RMCF0402FT100RCT-ND||0.025||12||0.30|
|Resistor, 0 ohms, 0603, Yageo RC0603JR-070RL||Digikey||311-0.0GRTR-ND||0.10||2||0.20|
Now, not all of these parts are used in the same buildup. The diode and the 0 ohm resistors aren’t installed at the same time; the 0402 resistors aren’t installed at all if the board is to be used for a projector build as they’d be unnecessary, etc. But I will kit all the boards based on this set of parts anyway, so this is the base cost for one unit.
There are additional ancillary costs not rolled into the above BOM. Packaging costs (antistatic bag, padded envelope), pre-soldered wires (if desired), assembly materials (solder paste, flux remover, etc), assemble-it-yourself materials (stencil, if desired). And you’ll note that I have not touched labor yet – if you want me to build up the boards, I will need to charge a nominal assembly fee. I won’t charge you a fortune, but it would be foolish to work for free.
I have quotes out at stencil manufacturers and will query the usual shipping suspects for pricing this week ([EDIT 2013.08.08] Shipping to the continental US is typically $3 for one or two units, shipping international is averaging about $7). The cost is $20 for a kit of parts,
$30-$35 for an assembled board ( pending stencil quote [EDIT 2013.07.09] None of the inexpensive stencil fabricators can do the aperture/web sizes on this board, so I’d need a professional stainless-steel stencil – which I won’t go for unless I get enough people interested in boards to offset the cost), plus shipping to your location. Note that this isn’t a start-to-finish kit – you’ll still need to provide a stable 3.3V source (assuming your DisplayPort cable doesn’t do so), and a source of 19-20V if you want to drive the backlight. This board was designed for the DIY projector crowd to be as cheap and simple as possible, so please be aware of its limitations.
I hope the projected cost isn’t more than expected. Labor is going to be the thing that really drives the price – right now it takes me an hour or so to build a board since I’m applying paste by hand.
I hope that I can get a stencil done for a reasonable price to reduce that effort. We’ll see. Nope.
More on this later. If you’re interested, please drop me a comment or an email so I can gauge interest. If a hundred people want one, a $180 professional stencil suddenly isn’t quite so big a deal (this board is too complex for the most inexpensive prototype laser services). Plus then quantity discounts start to apply on components and the BOM cost drops. Which means cheaper boards for all! Yay!