[simpits-tech] Circuit question - plus another for Gene (Joseph Fagner)

[pigi at frumar.it]

An easy way would be to use a simple LM 3914 ( http://www.national.com/pf/LM/LM3914.html )
"The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, 
providing a linear analog display" 
Thus you can use your slider to change the voltage in input and you get a nice line of led lit up as output.

onhttp://www.national.com/an/LB/LB-48.pdf  there is an application note you can use almost directly 
for your needs. Just change R1 and R2 with your slider, connecting one external pin at the end of R1 
( toward the D1 connection ), the other external pin at the end of R2 (toward ground) and the central pin toward 
the signal input. Use a 30/50k  (linear ) potentiometer ( slider )   and you should be done.

Hope this helps.

Pigi