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The adapter board is pretty simple, one chip, one USB port, a few
capacitors and resistors and 2 LEDs |
Overview
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For the chip, use either FT232BM or FT232AM, the former has replaced the latter. They can be purchased and sampled for very little from Saelig--and they wont rip you off for shipping either! None of the parts are that stringently specified. The LED's and their corresponding resistors can be left off if you don't want blinking lights every time. Soldering the chip on is nontrivial, and requires fine solder or solder paste, a conical tip and solder braid. The pin-pitch is 35mil. Chances are, if you've ever done smd soldering you can do it. The rest of the components are 1206 or larger. The red electrical tape was necessary to keep the metal case from shorting to one of the traces on this prototype version, and will not be necessary in the future (traces have been moved). |
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The board costs approximately $10 in components. In quantity, the PCB can be as little as $2 (if done thru 4pcb's barebones service) to as much as $5 if ordered with mask and legend. Assembly for a single sided board is approx. $5 per board, but theres a minimum of 50.
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