Electronics Engineer Helper vs KiCad Viewer

Digital toolbox for electronics engineers and electricians. Calculators and references for beginners and professionals — for work, study, DIY, and repair. Used by over 100,000 users. Completely ad-free. Included tools: • Datasheet search • Equivalent parts search (cross reference for transistors, diodes and ICs) • Resistor color and digit marking (4, 5 and 6 band color code; 2 symbols, 3/4 digit and EIA-96 code SMD resistors code) • Electronic schematic symbols (IEC 60617, IEEE 315 and GOST standards) • Pinouts of connectors and interfaces (USB, HDMI, DisplayPort, DVI, VGA, Thunderbolt, Apple Lightning and 30-pin, SATA, PCI Express and M.2, Ethernet RJ45 with PoE, RJ11/RJ14/RJ25, RS-232/422/485, IEEE 1394 FireWire, ATX, computer fans, SD card, audio jack, RCA, MIDI, XLR, PS/2, D-sub, SMEMA) • Pinouts of boards and microcontrollers (Raspberry Pi and Pico, Arduino, ESP32, ESP8266, STM32 Nucleo, Teensy, Orange Pi, RADXA Rock Pi, LubanCat, Flipper Zero, ATmega and ATtiny) • Ohm's law calculator • AWG converter (wire diameter, cross-section area, resistance and maximum current) • Resistor for LED • Voltage divider • Wheatstone bridge (output voltage or unknown resistance, current and power of every arm) • Capacitor code • Capacitor markings • Capacitor ESR tables • Frequency response curve calculation of passive filters (RC, RL, RLC, LC) • Inductor color code • Air-core coil calculator (inductance or number of turns of a single-layer solenoid) • Ideal transformer (winding turns, voltages and currents) • Linear current regulator • SMD packages list • Reactance • PCB trace resistance • Active, apparent and reactive power • RMS converter (peak, RMS and peak-to-peak values for seven waveform shapes) • 555 waveform generator • Operational amplifiers • RLC circuit • Number conversion • Unit converter • Cable voltage drop • Battery life (runtime of a battery pack, with discharge curve) • NTC thermistor resistance • Logic gates • RC circuit • Decibels calculator • 25-pair cable color code • Fuse color marking Additionally, by purchasing the PRO version of the app, you will get access to additional tools: • SMD components marking codes • Diodes color code (Pro Electron, JEDEC and JIS-C-7012 standards) • Linear voltage regulator • Resistor value to color or SMD code marking converter • Voltage rectifier • Series or parallel electrical components' connection calculator • Diode voltage drop • Minimum PCB trace width • Analog to digital conversion • Attenuators • 4-20 mA signal converter • Thermocouple calculator • Resistance thermometer • Buck switching voltage regulator • Wire resistance • Zener diode regulator (Zener diode and series resistor selection from a catalogue of 438 parts) • Load cell (bridge output voltage to weight, force, pressure or torque) • BJT voltage divider biasing • Transformer turns per volt (from core area, flux density and frequency) • Junction temperature (with or without a heatsink, power derating curve) • Solar string dimensioning (minimum voltage and current ratings for a PV array) • Solar cable and fuse selection (NEC and IEC rules) • 555 astable generator with variable duty cycle • NTC thermistor in a voltage divider and with an ADC input Privacy Policy: https://www.eehelper.app/ios/privacy/ Terms of Use: https://www.eehelper.app/ios/terms/

KiCad Viewer is a tool built for engineers hand-soldering their PCBs designed in KiCad. It lets you view the schematic, layout, 3D board and BOM list on your iPad or iPhone — keep your design on the bench right next to your iron, no laptop required. And when a pull request comes in, you can review what changed from the same place. Open native KiCad files directly. No exporting, no converting — point it at your project, in Files, iCloud Drive or a network share, and it reads your .kicad_sch and .kicad_pcb files as-is. Features: - Interactive schematic — pinch to zoom and pan around the full drawing. Tap any component or net and it stays highlighted, so you never lose your place mid-solder. - Cross-probing — select a part on the schematic and watch it light up on the board (and vice versa). Instantly find where R47 actually lives on your layout. - PCB layout viewer — explore the board with smooth zoom and pan. Toggle copper, silkscreen, and other layers on and off, dim the ones you're not working on, or switch to KiCad's own colors. - 3D view — turn the board to any angle, in perspective or isometric, tap a part to find it on the schematic, or put it on your desk at real size in AR. - BOM list — every part grouped by value and footprint, with quantities and reference designators, plus search to find that one cap fast. - Pull and merge request review — open a pull request from GitHub or Gitea, or a merge request from GitLab, and see every change on the schematic, board and BOM: parts added, removed or moved, traces rerouted, values edited. Flip between before, after and overlay, and step through the changes one by one. Paste a link to review a pull request without cloning the repo. A sample pull request is included, so you can try it right away. - Log in and clone directly from GitHub, GitLab or Gitea — sign in once and pull your repositories straight onto your device, private repos included. Self-hosted GitLab, Gitea and Forgejo (Codeberg) work too. Pull new commits and switch branches from the app. - Nested and hierarchical projects — opens multi-sheet schematics and projects buried in subfolders. - Works offline — once a project is on your device, everything loads with no connection. Perfect for the workbench, the lab, or anywhere. - Dark and Light modes — whichever you prefer. - Legacy to modern — supports KiCad 5 through 10, so decade-old .sch schematics open right next to brand-new projects. Designed from the ground up for touch, KiCad Viewer keeps your schematic, board, and parts list one tap away while your hands are busy. Requires a one-time purchase or subscription. Free trial available. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.kicadviewer.com/privacy KiCad Viewer is not affiliated with, or endorsed by, the KiCad project or its contributors. The app renders KiCad files with its own independent implementation, so some schematics or boards may not appear exactly as they would in KiCad. Please reach out to us if your design is not rendering correctly!