Lm3915 Calculator Updated -

The reference voltage determines the "full scale" point—the voltage level required to light up the 10th LED.

Electronics Forum (Circuits, Projects and Microcontrollers)https://www.electro-tech-online.com LM3915 math - Electro-Tech-Online lm3915 calculator updated

The LM3915 is unique because it uses a . Unlike its cousin, the linear LM3914, the LM3915 matches the logarithmic response of the human ear. the linear LM3914

This is where most people get confused. R2 sets the "floor" or the specific range voltage. lm3915 calculator updated

$$R2 = 1000 \times (\frac101.25 - 1)$$ $$R2 = 1000 \times (8 - 1)$$ $$R2 = 7000\Omega \text (or 7kΩ)$$