[sdiy] synth V meter

[Ingo Debus]

Am Montag, 24.05.04 um 19:09 Uhr schrieb Fernando de Izuzquiza:

> I can't find meters with 0 in the middle, by instance... I thought 
> that it can be done with a 0-x meter...
> I have to buy a different meter for 0 in the middle? I mean, is the 
> only way?
>

Of course not, you mentioned the EMS Synthi, it also has only one meter 
to do both jobs.

I'd use just a standard inverting summing amplifier here, one input is 
your voltage input and the other input is connected to a switch that 
lets you turn on or off a constant offset voltage that puts your meter 
into center position (when the first input is at 0 volts).

Ingo