Battery voltage level indicator simulation using LM3914 Dot/Bar graph driver

In this tutorial, you will learn how to simulate voltage level indicator using the LM3914 Dot/Bar graph Driver. The LM3914 is a monolithic analog controlled LED driver IC as well as its counterpart the LM3916, the difference between the both is that the LM3916 gives a logarithmic output scale, while the LM3914 gives a linear output scale, this makes the LM3916 suitable for volume unit (VU) meter. The IC can drive 10+ LEDs. One interesting thing about the IC is that it can be configured into either a dot output mode or a bar graph output mode.

To carry out the simulation Proteus, you must have installed Proteus in your computer, if you do not have Proteus in your computer, then you can download it here and then pick the following components to make the connection:

1. LM3914
2. 12 volts battery (active)
3. 3 LED-RED (active)
4. 3 LED-BLUE (active)
5. 3 LED-YELLOW (active)
6. 1 LED-GREEN (active)
7. 10K Potentiometer (active)
8.  2.2K Resistor
9. 18K Resistor
10. DC Voltmeter
11. SPST Switch (active)

Note that the active components must be selected to give real-time simulation. See full video of the simulation below

For further study, check out these tutorials

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How to simulate HC-SR04 ultrsonic sensor in Proteus
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