On Sun, Jan 27, 2008 at 12:47:25PM -0800, Kirk Wallace wrote:
> I got my serial DAC prototype working, but the first VFD I hooked up
> would not accept a voltage only signal, it needed a potentiometer on the
> +10 V, Signal and 0V terminals.
Is it a "Multiplying DAC" you're using? (i.e. takes an external voltage
reference) If so, it should be able to be used as an attenuator. (read
potentiometer) If it'll take a 10v reference input, then just remove the
voltage reference, and connect:
Gnd -> Gnd
VFD's +10v -> DAC Vref input
DAC output -> VFD control input. (Which is expecting a pot wiper.)
Should just work.(tm) [Might want to watch for ground loops.]
Erik
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