Quote:
Originally Posted by pmrid
Thanks Malcolm.
I'm wondering now whether I actually need the VCC/VPP at all - the EQMOD documentation seems to suggest that only GND, RX and TX are needed.
http://eq-mod.sourceforge.net/tutindex.html - scroll down a bit to about mid-page where they talk about the FTDI cable.
Any thoughts?
Peter |
The instructions on the EQMOD Website are quite clear and tried and tested - they are all the advice you need.
There is 12V coming out of the mount and on some EQDIRECT types (Bluetooth, RS232) this is used to provide power. However, the ftdi USB cable takes its power from directly form the USB (5V) line so the only connections you have to make are GND, Rx, and Tx.
If you are fitting your own RJ45 plug then just omit the 12V line completely. If your are splicing a cable to your ftdi cable and the 12V line is present on the RJ45 then you should carefully isolate it.
Please be warned that if you manage to short the 12V line to either the Tx or Rx lines you will permanently damage both microcontrollers (one for each axis).
Chris.