12dstring

Take one PL-2303 USB-serial cable (e.g. USB to UART (TTL) Cable module PL2303 Converter | eBay) - £2.99 One 2m RJ45 ethernet cable (e.g. 2m BLACK RJ45 CAT5 PATCH ETHERNET NETWORK CABLE LEAD | eBay) - £0.99 Remove one end of the ethernet cable and strip back, check wiring colours. The USB serial converter has a small circuit inside: As a side note, the little PCBs are great for mods that need a serial interface such as webcam long exposure mods or DSLR shutter cables. The DTR and RTS signals required for them are indicated below (labeled A and B on the PCB). Note the chip is a 3.3v part with 5v tolerant inputs, so make sure you choose a part to interface it with which as Ok with 3.3v level signals (i.e. 74LS00 for the SC1 mod). Ideal for compact USB-only mods as done by yesyes ( http://stargazerslounge.com/diy-astronomer/148315-spc900-lxmod-yesyes-style.html), the chip is the same type, but the PCB smaller as it doesn't have the RS232 voltage level converter meaning you can interface directly with logic levels parts instead of needing diodes+transistors. (You don't need to worry about RTS and DTR for the EQDir.) Connect the two cables as follows: Gnd-Gnd Rx-Tx Tx-Rx If your connector wiring colours are exactly the same as in these pictures, then the connections are as follows: Black - Orange/white + Solid blue Green - Blue/white White - Solid green Pair the unused solid brown + brown/white off together (12v)and insulate them from the others. Same with the solid orange and green/white. Do check with a multimeter before hand to make sure you have the 12v lines correctly identified. Make sure all lines are nicely insulated and give it a test, and add some heatshrink when done. Worked first time on my XP laptop. Will try on Windows 7 64 bit later. Total cable length is a little under 3m, can be extended 5m on the USB side. This is for the HEQ5, for the EQ6 just swap the RJ45 ethernet side with an RS232 DB9 cable and use the EQ6 pinout here: http://eq-mod.sourceforge.net/eqdirect_232.png