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Expanded scale meter

2017-08-17 01:48  
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A bar graph driver IC LM314 drives anXED display. The LEDs may be separate or in a combined (integral) bar graph display. Calibration: With a precision meter be-tvveen pins 4 and 6 adjust Rl for voltage Vq of 1 20V. Apply 4.94V to pin 5, and adjust R4 until LED No. 5 iust lights.
Expanded scale meter

The adjustments are non-interacting.



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