Lm3915 Calculator Updated !exclusive! -

The is a specialized integrated circuit (IC) widely used by hobbyists and engineers to create logarithmic visual displays, most notably for audio VU meters and signal strength indicators . Unlike the linear LM3914, the LM3915 features a 3 dB per step logarithmic response, which matches how human hearing perceives sound intensity.

VREF=1.25V×(1+R2R1)cap V sub cap R cap E cap F end-sub equals 1.25 cap V cross open paren 1 plus the fraction with numerator cap R 2 and denominator cap R 1 end-fraction close paren : Connected between Pin 7 (REF OUT) and Pin 8 (REF ADJ). : Connected between Pin 8 (REF ADJ) and Ground. Step 2: Calculate LED Current ( ILEDcap I sub cap L cap E cap D end-sub The current flowing out of Pin 7 ( IREFcap I sub cap R cap E cap F end-sub lm3915 calculator updated

resistor in series with the signal input (Pin 5) can protect it up to ±100Vplus or minus 100 cap V : Always place a tantalum or The is a specialized integrated circuit (IC) widely

electrolytic capacitor across the LED supply to ground to prevent oscillations. 4. Sourcing Your Components If you're starting a new project, the LM3915 IC Go to product viewer dialog for this item. is available from various electronic component retailers. : Connected between Pin 8 (REF ADJ) and Ground

Using these formulas, you can customize your circuit for different input signals. Target Application Max Input Signal VREFcap V sub cap R cap E cap F end-sub Line Level Audio High Range Display