Lm3915 — Calculator Updated

Vref = 1.25 * (1 + R2 / R1)

Digital meters have lag. An LM3915 responds in microseconds—faster than any ADC (Analog to Digital Converter). For real-time audio compression adjustment or radio signal strength (S-Meter), analog is king. Furthermore, the warm glow of 10 discrete LEDs has a retro-futuristic appeal that digital screens cannot match. lm3915 calculator updated

R_LED = (Vcc - Vf_LED) / I_LED