Voltary: Electronics Toolkit

Voltary is a fast, offline electronics toolkit for engineers, students, makers, and hobbyists. Open the app and get answers instantly — no internet, no account, no sign-up required.

Whether you're designing a circuit, debugging hardware on the bench, wiring a connector, or studying for an exam, Voltary brings the calculators, pin-outs, and references you reach for every day into one clean, fast app.

⚡ 40+ CALCULATORS & CONVERTERS
Solve it in seconds with live, formula-backed tools:
• Ohm's Law, power & power factor
• Voltage divider and LED series resistor
• Resistor colour code (3/4/5/6-band) + SMD codes
• Capacitor charge/discharge, RC/RL/LC filters
• Reactance, impedance & resonance
• 555 timer (astable / monostable)
• Op-amp and voltage regulators (linear & adjustable)
• Inductor design, Y-Δ transform, RTD/PT100, decibels, number bases, and more
Every calculator shows the formula and updates as you type.

🔌 39 CONNECTOR PIN-OUTS
Real, accurate connector diagrams you can tap to zoom and pan, with pin names, numbers and functions:
USB-A/B/C, HDMI, DisplayPort, VGA, DVI, DB9, RJ-45 / PoE, Raspberry Pi GPIO (40-pin), Arduino, SATA, microSD / SIM, XLR, MIDI / DIN, TRS, RCA, OBD-II, JTAG, GPIB / IEEE-488, PCI / PCIe, BeagleBone, and many more.

📚 REFERENCE LIBRARY
The tables you always end up searching for — bundled offline:
• Resistor & capacitor standard values (E-series)
• AWG wire gauge & current ratings
• Logic level thresholds (TTL / CMOS)
• Decibel (dB) reference, IP code, ASCII
• SMD package sizes, fuse types, battery chemistries, and more

✏️ SCHEMATIC SKETCHPAD
Sketch quick circuit ideas right on your phone — drop components, wires and notes for a fast hand-drawn schematic.

WHY VOLTARY
• Works 100% offline — no connection needed
• No account or sign-up
• Fast, lightweight, clean dark interface
• Available in 14 languages
• Built for real bench work, classrooms and field repairs

From your first breadboard to professional EE work, Voltary keeps the whole electronics bench in your pocket — online or off.

Recent changes:
New look, same offline toolkit:
• Bolder design with Liquid Glass navigation
• Refreshed Home, Search and Settings
• Improved accessibility and contrast
• Performance improvements and fixes