okay, i've been reading this
**broken link removed** about making a voltage controlled current source to achieve the same thing, which seems to be what i'm looking for.
however, i'm not super excellent at interpreting the circuit diagram in order to figure out exactly what i'd need; how many components does that require, for example?
also, if anyone has experience of the joystick port, before i launch into this could someone suggest whether or not this is suitable? i'm not certain of the kind of figures required for the joystick axis pin; all i'm aware of is that it uses up to 100kOhm resistor. is that right?
i'm very sorry to seem so ignorant on the matter. i hope that someone is able to help out? thanks again