Electronics Engineer Helper

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

• 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 Guide (DVI, USB, Display Port, VGA, HDMI, Thunderbolt, Apple, RS-232/422/485, ATX, RCA, MIDI, XLR, Audio Jack, Arduino, Orange Pi, STM32, ESP32, and Raspberry Pi)

• Ohm's law calculator

• AWG converter (wire diameter, cross-section area, resistance and maximum current)

• Resistor for LED

• Voltage divider

• Capacitor code

• Capacitor markings

• Capacitor ESR tables

• Frequency response curve calculation of passive filters (RC, RL, RLC, LC)

• Inductor color code

• Linear current regulator

• SMD packages list

• Reactance

• PCB trace resistance

• Active, apparent and reactive power

• 555 waveform generator

• Operational amplifiers

• RLC circuit

• Number conversion

• Unit converter

• Cable voltage drop

• 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 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

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