using an analong meter for diy-wb ( Correction )

Phil Hunter ilphayunterhay at yahoo.com
Fri Feb 15 21:50:27 GMT 2002


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
(digest)

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