Probably the simplest method would be to use a non-inverting op amp
circuit. An LM324 might be a good chipt to use, as it has four op amps in
it. The fain of a non-inverting op amp amplifier is 1+(Rf/R1) where Rf is
the resistor between the output and the inverting input, and R1 is the
resistor between the inverting input and ground. Apply the input to the
non-inverting input. The actual values of the resistors is largely
unimportant (too small increases power dissipation, too large increases
output error due to bias current or input offset current). For most simple
applications, I'd make them bothe 10k.

Good luck!

Harold


> Dear People,
>
> I hope no-one minds me posting another question so soon after my one about
> serial comms and 628 but anyway.     I am using a 16f84 to act as a 4
> channel Digital to Analog converter using PWM.   It seems to work OK but
> what I really need to do is scale it so that it is 0 to 10v rather than 0
> to 5.    This is just a signal voltage so very little load.
>
> Appreciate any comments.
>
> Regards,
>
>
> Lee.
>
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>


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