using an analong meter for diy-wb ( Correction )

[bcroe at juno.com]

That'll work.  But you need to rewire the circuit and add
another jack for the + meter terminal. 

A simple resistor is a "voltage to current" converter 
too.  A resistor (pot if you like) from the output to 
the meter, to gnd, doesn't require a lot of rewiring. 
The meter movement becomes part of the resistor.

Bruce Roe

On Thu, 14 Feb 2002 14:20:40 -0800 (PST) Phil Hunter
<ilphayunterhay at yahoo.com> writes:
> Sorry Enzo ( and list ), I realized I blew it on my previous
> post, transposing the meter and potentiometer.
> 
> If you connect the positive (+) meter lead to the output of
> of the op-amp (pin 7), the negative (-) meter lead to both
> pin 6 of the same op-amp and to one end of the pot, and
> connect the center lead of the pot to J12, the circuit should
> work "as advertised", i.e. a voltage to current convertor.
> 
> I should also mention that these op-amps can only output a
> maximum of about 10mA of current, don't try to use 'em to
> drive one of Radio Shack's 500mA meters.
> 
> rgds,
> philh

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