[DW] sums up

[…] a description of the methodology of reverse engineering a simple hardware device. […] (to make a custom) USB-to-TTL serial cable to upload our own custom code

The CA-42 “Nokia” cellphone data cable was shown to be a good start for an Arduino cable conversion. Recognizable IC’s with part numbers screened on. Piece of cake! Search eBay for “CA-42” and you’ll find tons. Beware the old cheap-sale-price-expensive-shipping phenomenon.

The pinout for Nokia phones is well-covered on the net, and with a continuity tester I traced back from the Nokia connector to the PCB.

So I found that:

phone connector pin 8 (GND) —> orange wire —> PCB pad 6

phone connector pin 7 (TX) —> blue wire —> PCB pad 12

phone connector pin 6 (RX) —> red wire —> PCB pad 9

Read the step by step guide from [KwartzLab]

This entry was posted by Davide Gomba on Friday, April 23rd, 2010 and is filed under cables, Junk. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.