DB Component Decoder

DB Sistemi

About this app

The complete tool for students and electronics enthusiasts. Component decoder, power supply design, semiconductor database, and interactive quizzes—all offline, all free, and zero ads.

▸ COMPONENT DECODER: 3/4/5/6-band resistors with bidirectional decoding (colors→value and value→colors). Ceramic, tantalum, and electrolytic capacitors. Inductors with color bands and SMD codes. LED resistor calculator with series and parallel support.

▸ CIRCUIT CALCULATION: Series and parallel for R, C, and L circuits with up to 6 components. RC/RL time constant, cutoff frequency, energy, and power. RC, RL, and RLC filters with interactive Bode plots.

▸ POWER SUPPLY: AC/DC power supply design: half-wave, bridge, and center-tapped. DC voltage, ripple, and bulk capacitor calculations with regulator dropout check. Primary and secondary transformer fuse sizing with inrush margin.

▸ SEMICONDUCTOR DATABASE: SMD code decoder. Transistor database (NPN, PNP, MOSFET, JFET, IGBT) with pinouts, specifications, and equivalents. Diode database (signal, Schottky, rectifier, Zener, TVS, LED). 78xx series regulators, LM317 and compatible. Integrated and discrete bridge rectifiers.

▸ TEACHING: Interactive exercises with scoring and detailed explanations. History of analyzed components.

▸ FEATURES: ✓ 100% offline ✓ Dark mode ✓ No ads, no tracking ✓ Designed by an ITIS teacher for electronics students

What’s new

Prima release Android