Electronics Engineer Helper vs Crew Commander

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/

Crew Commander brings your jobs, customers and crew together in one organized workspace for field-service businesses and trade contractors. PLAN THE WORK Create jobs, assign your crew and manage the schedule. Keep site addresses, notes, photos and documents together so your team has the information it needs in the field. Administrators can remove test or unwanted jobs from the active job list and schedule while retaining financial and supporting records. FROM ESTIMATE TO INVOICE Organize customers, prepare estimates and invoices, review your pipeline and track receivables. Keep the office and field team working from the same company records. CAPTURE FIELD DETAILS Use the Job Assistant to record spoken observations, materials, photos and punch-list items. Optional AI analysis helps turn a walkthrough into a structured draft for review. Always check generated scope, quantities and costs before sharing them with a customer. STAY CONNECTED Review job activity, time logs, mileage and job-site weather. Assignment notifications help crew members keep up with new work. Location features depend on device permissions, connectivity and GPS conditions; they are not a safety-monitoring service. ONE COMPANY, SHARED ACCESS The company owner manages license and capacity purchases. Employees sign in to their company account and receive the company’s purchased feature access, subject to their assigned role and permissions. Employees do not need to buy individual feature unlocks. The complete company license includes 50 customer records. Five user accounts, including the owner, are included. Optional one-time in-app purchases expand customer capacity or add five more company seats per seat-pack purchase. Existing larger teams retain their established seat allowance. Purchased seats stay with the company account across device changes and reinstalls. Deleting an unused account frees its seat; deactivating an account retains its seat. There is no recurring subscription for these capacity upgrades. Prices are shown in your local currency before purchase. BUILT FOR THE TRADES For electrical, plumbing, HVAC, construction, maintenance and other field-service teams that need a clearer view of their work. An account and internet connection are required for cloud features. Camera, microphone, speech recognition, notification and location permissions are requested for the features that use them. Optional AI processing requires consent. Privacy policy: https://www.underyourscreen.com/privacy-policy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/