Homebrew PCBs

Just checked my Acad R-10 interface manual

CalComp requires a 3 wire NULL MODEM RS-232 cable with hardware 
handshake at both ends

cross connect TX and RX data lines and pin 7 signal ground.

On both cable ends jump pin 4 to 5 and 6 to 8 to 20.

Pin numbers are for 25 pin connctors Google a conversion chart if you 
are using a 9 pin.

Hugh


Lez wrote:

>Well I have won a new plotter on ebay, its a HP7475A, I have seen
>conversions on the web which just consist of cutting a slot in the
>plastic so a taller etch resist pen can be put into the pen carosel.
>
>Hopefully this will allow me to make quick and dirty lo-res pcb's for
>small circuits that just use to92 transistors 0.1''inch chips in DIP
>package etc.
>
>Hopefully printer drivers etc wont be such an issue, never had a
>plotter working so dont know how I am supposed to send a BMP to it to
>be plotted, do I need some form of conversion software?
>
>All being well by Thursday it should be with me, maybe the cable it
>somes with will work the calcomp...(which I think is by far the better
>machine by being a true x/y flatbed not a paper shuffler)
>
>
>  
>