Electronic Formulator vs WristBoard

Electronic Engineer puts over 1,100 formulas and 24 reference tables in your pocket. No internet required. No ads. Just fast, accurate calculations when you need them. POWERFUL CALCULATORS Solve real-world electrical problems instantly: • Ohm's Law — Voltage, current, resistance, and power calculations • Voltage Divider — Output voltage, resistor values, current, and power dissipation • Three-Phase Power — Balanced systems, Wye and Delta connections • LED Circuits — Series resistor selection, power dissipation, max LEDs in series • 555 Timer — Astable and monostable modes with frequency, duty cycle, and timing • RLC Circuits — Resonant frequency, Q factor, bandwidth, impedance, and reactance • Power Triangle — Real, reactive, and apparent power with PF correction sizing • Impedance & Resistance — AC/DC circuit analysis • Star-Delta Conversion — Transform between Y and Δ configurations • Wheatstone Bridge — Unknown resistance and unbalanced bridge voltage • Inductors — Reactance, energy storage, series/parallel, and time constants • Wire Sizing — Circular mils, voltage drop (single and three-phase) • Capacitors, Transformers, Motors, Batteries, UPS, Lighting, and more PRO CALCULATORS Unlock advanced tools for professionals: • Op-Amp Circuits — Inverting, non-inverting, differential, and voltage follower • Filter Design — RC and RL low-pass, high-pass, and bandpass filters • PCB Trace Width — IPC-2221 current capacity and trace resistance • Skin Effect — Depth calculations for copper and custom conductors 24 REFERENCE TABLES Instantly look up critical data — no more flipping through handbooks: • AWG Wire Gauge — Diameter, area, resistance, and ampacity • NEC Ampacity Table — 60°C, 75°C, and 90°C conductor ratings • Resistor Color Codes — 4-band and 5-band decoding • Standard Resistor Values — E12, E24, E48, and E96 series • Circuit Breaker Sizes — Amp ratings, wire sizes, and typical applications • Wiring Color Codes — NEC, IEC, and Australian standards • Logic Gates Truth Tables — AND, OR, NAND, NOR, XOR, XNOR • Transformer Connections — Delta, Wye, Scott-T, Zig-Zag, and more • Power Factor Reference — Typical PF for motors, lighting, drives, and loads • SI Prefixes — From tera to femto with electronics examples • Conductor Properties — Resistivity, conductivity, and temp coefficients • Common Semiconductor Pinouts — BJTs, MOSFETs, regulators, 555, 741 • NEMA Enclosure Types — Indoor/outdoor ratings with IP equivalents • IP Protection Ratings — Solids and liquids protection levels • Ampacity Derating Factors — Temperature and conduit fill corrections • Standard Capacitor Values — Ceramic, film, and electrolytic • Cable Types — THHN, THWN, NM-B, MC, UF-B, and more • Decibel Reference — Power and voltage ratios at a glance • Motor Frame Sizes, Fuse Classes, Conduit Fill, and more UNIT CONVERSIONS Over 400 conversion formulas across 19 categories including metric, linear, liquid, cubic, pressure, weight, flow, BTU, horsepower, watts, joules, frequency, and HVAC. Plus 8 temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Delisle, Newton, and Rømer. BUILT FOR YOUR WORKFLOW • Favorites — Star the calculators you use daily for one-tap access • Calculation History — Every result saved automatically for easy reference • Export & Share — Send results to colleagues or save for documentation • Search & Filter — Find any formula or reference table in seconds • Dark Mode — Designed for comfortable use on job sites and in the field • US & Metric — Toggle between unit systems instantly WHY ELECTRONIC ENGINEER? Built by engineers, for engineers. We obsessed over accuracy, speed, and completeness so you can focus on what matters — getting the job done right. One purchase, no subscriptions, no recurring fees.

Swipe and type messages on your Apple Watch using a fully functional keyboard with WristBoard. * As featured on the App Store, 9to5Mac, Cult of Mac, iMore, AppAdvice, TechRadar & iPhon.fr * Typing messages on Apple Watch can be chore - Scribble doesn't always work and Dictation isn't great in public spaces. With WristBoard, you get a fully-fledged keyboard straight on your wrist, no awkward typos necessary! By adding a full QWERTY, AZERTY or QWERTZ keyboard to your Apple Watch, you can reply to iMessages quickly and privately. Autocorrect and smart text predictions quickly ensures what you type is accurate and makes senses. WristBoard contains these great features: FULL KEYBOARD Add a full QWERTY, AZERTY or QWERTZ keyboard to your Apple Watch. Keys are easy to press and there’s support for key previews as you swipe along the keyboard. SWIPE KEYBOARD WristBoard was the first app to introduce swipe typing on Apple Watch and provides a more efficient way to type out messages on your wrist. SENDING WristBoard uses the built-in Apple Messages app on your Apple Watch to send messages to your contacts. Type out your message, tap the send button and you’ll be taken to the Messages app with your message ready to go! There's support for the Apple Mail app too so you can emails all from your wrist! SUGGESTIONS As you’re typing, you can complete words using the suggestions bar above the keys. Tap on a suggestion to replace the current typed word with the full suggestion. Great for improving speed on the small screen! Access all suggestions by tapping the ellipsis icon next to the first suggestions. AUTOCORRECT Whilst typing, if you make a mistake, WristBoard will automatically replace the incorrect word with one it thinks is correct. OTHER CHARACTERS WristBoard has full support for adding symbols, numbers and other special characters. EMOJI WristBoard supports adding an unlimited amount of emoji to a single message! Simply tap the emoji icon to get started and pick from Apple’s library, or one of your most recently used ones. THEMES Customise the look and feel of your keyboard with support for themes. MESSAGE PREVIEW Before sending your message, just tap the text field to view a full preview of your message. HAPTICS Choose to receive Haptic Feedback on actions like key presses and button actions. COMPLICATION For quick and easy access, you can add the WristBoard Complication to your Watch Face. Just tap and the keyboard will launch. CURSOR Whilst typing on the keyboard, you can see exactly where you are with the pulsing blue cursor. Use the Digital Crown to move the cursor's position. SETTINGS Customize WristBoard your way. Access the Settings menu by using the options button on the keyboard and you’ll be able to change the layout and toggle auto correct, suggestions & more. If you like this app, I’d really appreciate it if you could take the time to leave a positive review! Having issues? Please get in touch: Email: support@adamfoot.dev Website: https://adamfoot.dev Please note, a supported Apple Watch is required for full app functionality. WristBoard supports sending messages via SMS & iMessage through the Messages app or email through the Mail app. Some features may require a WristBoard+ subscription which can be purchased in the app. You can cancel at anytime. Terms: https://adamfoot.dev/terms-of-use