LM3914

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SNVS761B – JANUARY 2000 – REVISED MARCH 2013

*This application illustrates that the LED supply needs practically no filtering

Calibration: With a precision meter between pins 4 and 6 adjust R1 for voltage VD of 1.20V. Apply 4.94V to pin 5,

and adjust R4 until LED No. 5 just lights. The adjustments are non-interacting.

Figure 17. Expanded Scale Meter, Dot or Bar

Table 1. Application Example: Grading 5V Regulators

Highest No.

Color

VOUT(MIN)

LED on

10

Red

5.54

9

Red

5.42

8

Yellow

5.30

7

Green

5.18

6

Green

5.06

5V

5

Green

4.94

4

Green

4.82

3

Yellow

4.7

2

Red

4.58

1

Red

4.46

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