Electronics Engineer Helper vs Marine Engineer

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/

Marine Engineer is a professional vessel management and engineering workspace designed for marine engineers and engine officers. Keep machinery details, engineering calculations, tank records, daily work, technical notes, certificates and documents organised under separate vessel profiles. Continue working even while offline at sea. KEY FEATURES Vessel Profiles Create separate vessel profiles and keep technical information, operational records and documents organised in one place. Machinery Inventory Record main engines, diesel generators, boilers, pumps, separators, compressors, fresh water generators, refrigeration systems and auxiliary equipment. Engineering Calculators Access practical tools for tank geometry, shaft power, engine performance, mechanical calculations, fluid systems, thermal calculations and unit conversions. Bunker Fuel Calculator Calculate bunker quantities using tank measurements, temperature and density corrections. Prepare fuel blending and internal transfer calculations and save records under the relevant vessel. Tank Management Create calibrated tank profiles and calculate quantities from sounding or ullage measurements. Manage IOPP tank details and track balances associated with supported ORB operations. Logbook and Technical Notes Record daily activities, maintenance work, outstanding tasks, recommendations and watchkeeping notes. Track completed work and keep important information organised for your next handover. Edit and Delete Records Long-press supported saved records to edit or delete them. Update calculation inputs and recalculate results without creating unnecessary duplicate records. Professional Handover PDF Reports Create and export structured PDF reports containing vessel information, technical records and completed work for professional handovers. Vessel Document Archive Keep technical manuals, certificates, vessel photographs, personnel documents and other technical files under the relevant vessel profile. Certificate Tracking Record certificate issue and expiry dates, review renewal status and enable expiry reminders. OPTIONAL ORB PART I MODULE Prepare structured Oil Record Book Part I entries using operation-specific workflows for: • Sludge collection, transfer and disposal • Bilge water transfers and discharge • 15 ppm equipment operations • Bunkering • Incineration • Weekly inventory and equipment tests • Additional ORB remarks Use registered tank details, review calculated quantities for supported operations and check the structured preview before transferring information to the official Oil Record Book. FREE ACCESS AND OPTIONAL PURCHASES Manage one vessel free of charge. EngineRoom Pro auto-renewing subscriptions provide additional vessel capacity. Available plans support up to 3, 5, 10 or 15 vessels, or unlimited vessels. The ORB Part I module is not included in EngineRoom Pro subscriptions and is available separately as a one-time lifetime purchase. Subscription prices and billing periods are displayed in the app before purchase. Subscriptions renew automatically unless cancelled before the renewal date. You can manage or cancel your subscription in your App Store account settings. IMPORTANT Marine Engineer is designed to support calculations and record preparation. It does not replace approved vessel documents, official record books or professional judgement. Calculations, tank quantities and ORB entries must be reviewed by the responsible officer and verified against vessel documentation, company procedures and applicable regulations. Knowledge • Safety • Efficiency By your side, every watch. Privacy Policy: https://medpov.com/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/