Electronics Engineer Helper
Calculators and references
무료 · 앱 내 구입
전자공학 엔지니어와 전기 기술자를 위한 디지털 도구 상자. 초보자와 전문가를 위한 계산기 및 참고 자료 — 업무, 학습, DIY, 수리에 활용. 10만 명 이상의 사용자가 사용 중. 완전히 광고 없음.
포함된 도구:
• 데이터시트 검색
• 저항기 색상 및 숫자 표시 (4, 5, 6밴드 색상 코드, 2자리, 3/4자리 및 EIA-96 코드 SMD 저항기 코드)
• 전자 회로도 기호 (IEC 60617, IEEE 315 및 GOST 표준)
• 핀아웃 가이드 (DVI, USB, Display Port, VGA, HDMI, Thunderbolt, Apple, RS-232/422/485, ATX, RCA, MIDI, XLR, Audio Jack, Arduino, Orange Pi, STM32, ESP32, Raspberry Pi)
• 옴의 법칙 계산기
• AWG 변환기 (도선 직경, 단면적, 저항 및 최대 전류)
• LED용 저항기
• 전압 분배기
• 커패시터 코드
• 커패시터 표시
• 커패시터 ESR 표
• 수동 필터 주파수 응답 곡선 계산 (RC, RL, RLC, LC)
• 인덕터 색상 코드
• 선형 정전류 레귤레이터
• SMD 패키지 목록
• 리액턴스
• PCB 트레이스 저항
• 유효, 피상 및 무효 전력
• 555 파형 발생기
• 연산 증폭기
• RLC 회로
• 진법 변환
• 단위 변환기
• 케이블 전압 강하
• NTC 서미스터 저항
• 논리 게이트
• RC 회로
• 데시벨 계산기
• 25쌍 케이블 색상 코드
• 퓨즈 색상 표시
또한 PRO 버전을 구매하시면 다음의 추가 도구를 이용할 수 있습니다:
• SMD 부품 마킹 코드
• 다이오드 색상 코드 (Pro Electron, JEDEC 및 JIS-C-7012 표준)
• 선형 전압 레귤레이터
• 저항값-색상 표시 변환기
• 전압 정류기
• 직렬 또는 병렬 전기 부품 연결 계산기
• 다이오드 전압 강하
• 최소 PCB 트레이스 폭
• 아날로그-디지털 변환
• 감쇠기
• 4-20 mA 신호 변환기
• 열전대 계산기
• 저항 온도계
• 벅 스위칭 전압 레귤레이터
• 도선 저항
개인정보 처리방침: https://www.eehelper.app/ios/privacy/
이용약관: https://www.eehelper.app/ios/terms/
더 보기 - [PRO] 태양광 스트링 설계. 패널 사양, 온도 계수, 설치 장소의 최저·최고 온도로부터 PV 어레이에 필요한 충전 컨트롤러 또는 인버터의 최소 전압 및 전류 정격을 구합니다.
- [PRO] 케이블 및 퓨즈 선정. NEC 또는 IEC 규칙에 따라 PV 어레이의 도체 단면적과 스트링 퓨즈 및 단로 장치의 정격을 선정합니다.
- RMS 변환기. 일곱 가지 파형에 대해 전압 또는 전류의 피크값, 실효값, 피크 투 피크값을 서로 변환하고 각 파형의 파고율과 평균값을 표시합니다.
- 새로운 핀아웃: Ethernet PoE, ATmega328P, ATtiny85, ATtiny84A, ATmega32U4, ATmega4809.
앱의 PRO 버전을 구독하거나 구매해 주신 모든 분께 진심으로 감사드립니다. 여러분의 지원이 이 앱을 더욱 발전시키는 데 큰 도움이 됩니다. 이 앱이 마음에 드셨다면 평가와 리뷰를 남겨 주세요.
감사합니다,
Rostyslav
26.08 1일 전
- [PRO] Junction temperature calculator. Finds the junction temperature or dissipated power from ambient temperature and thermal resistances, with or without a heatsink, and plots the power derating curve.
- New pinouts: SMEMA, two RS-485 variants, and RJ11/RJ14/RJ25.
- Area and volume units in Unit Converter.
- Additional sources for datasheet and equivalent parts search.
Big thank you to everybody who subscribed or purchased the PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.07.2 7월 19일
- Ideal transformer calculator. Finds unknown winding turns, voltages and currents from the turns ratio, or the winding currents from the rated power.
- [PRO] Turns-per-volt calculator. Determines the volts per turn and number of turns for a transformer winding from operating frequency, effective core area and maximum flux density.
- Cable voltage drop calculator displays the formulas used in the calculation.
- Search bar in the tools list.
Big thank you to everybody who subscribed or purchased the PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.07 6월 22일
- Air-core coil calculator. Determines inductance or required number of turns of a single-layer solenoid from former diameter, wire diameter, insulation thickness and gap between turns. Also reports wire and coil length.
- [PRO] BJT voltage divider bias calculator with three modes: voltage and current ratios, target operating point voltages, or a given set of resistors.
- Additional pressure measurement units in Unit Converter.
- This is the last release supporting iOS 16. Please update to a newer iOS version to continue to receive updates.
Big thank you to everybody who subscribed or purchased the PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.06 5월 25일
In this update:
- Battery life calculator. Estimates runtime of a battery pack from its chemistry, cell configuration, capacity, depth of discharge and load. Advanced mode additionally accounts for internal resistance, C-rate, Peukert exponent and energy conversion efficiency, and plots the discharge curve.
- [PRO] Series and parallel connection calculator now accounts for component tolerance. Select an E-series for each resistor, capacitor or inductor to see the minimum and maximum of the equivalent value. Entered components are also kept between application relaunches.
- [PRO] PCB trace width calculator now also shows the trace cross-section area and the minimum via diameter and barrel area required to carry the same current.
- Unit Converter now supports angle and torque measurements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.05.2 4월 29일
In this update:
- Battery life calculator. Estimates runtime of a battery pack from its chemistry, cell configuration, capacity, depth of discharge and load. Advanced mode additionally accounts for internal resistance, C-rate, Peukert exponent and energy conversion efficiency, and plots the discharge curve.
- [PRO] Series and parallel connection calculator now accounts for component tolerance. Select an E-series for each resistor, capacitor or inductor to see the minimum and maximum of the equivalent value. Entered components are also kept between application relaunches.
- [PRO] PCB trace width calculator now also shows the trace cross-section area and the minimum via diameter and barrel area required to carry the same current.
- Unit Converter now supports angle and torque measurements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.05 4월 27일
In this update:
- Differential amplifier calculator. Solve for any unknown parameter (resistor values, input or output voltages) in a differential op-amp circuit. Calculates inverting and non-inverting gain.
- [PRO] Wire resistance calculator. Determine the DC resistance of a conductor based on its material, cross-section, temperature and length. Supports AWG, IEC 60228 standard sizes, and custom circular or rectangular cross-sections. Also calculates voltage drop and dissipated power.
- Pinouts for Orange Pi 4 Pro and Zero 3 single board computers.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.04 3월 30일
In this update:
- Section switch at main menu. It allows to quickly switch between list of all, favorite and recently used calculators.
- [PRO] Ability to add your own SMD components marking codes.
- Updated Reactance Calculator. It is now possible to calculate not only reactance but also capacitance or inductance and frequency.
- [iOS 17+] ESR table shows lower and upper bounds of expected capacitance.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.03 3월 11일
In this update:
- [PRO] Square root scale type in 4-20 mA current loop calculator.
- Color code tool for decoding marking of fuses.
- Ability to edit individual bits in Number Converter.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.02 2월 17일
In this update:
- [PRO] Updated the database of SMD components’ markings. It now stores 518 thousand components and is available without Internet access.
- Updated ESP32 pinouts.
- Capacitor code calculator now additionally displays calculated capacitance with milli, micro, nano and pico prefixes.
- Improved contrast of some elements when a dark color scheme is used.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
26.01 1월 26일
In this update:
- [PRO] Resistor voltage divider calculator for DC buck voltage converter.
- 11 pinouts of PCI Express M.2 interface.
- Search bar in pinouts list screen.
- [PRO] Pt(391)46 and Cu53 resistance temperature detectors.
- RC circuit calculator automatically saves entered values between application relaunches.
- Small change of Ohm's law formula selection wheel.
May all your wishes come true in 2026.
Happy New Year!
Regards,
Rostyslav
25.12 2025. 12. 31.
In this update:
- Apple Shortcuts support. Add frequently used tools to home screen using integration with Apple Shortcuts.
- [PRO] Type L thermocouple.
- [PRO] New types of resistance temperature detectors.
- New SATA pinouts.
- Updated app icon for iOS 26.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.11 2025. 11. 19.
In this update:
- [PRO] New amplitude-phase frequency response plot (Nyquist plot) in passive filter editor.
- Ability to turn off display sleep while the app is open in app settings.
- Color code tool for decoding marking of 25-pair cables.
- Vietnamese and Thai localizations.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.10 2025. 10. 10.
In this update:
- Passive filter editor now also shows phase response curves. You can also customize the measurement units for better analysis of your filter designs.
- Unit converter now supports kg/cm2 pressure measurements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.08 2025. 08. 24.
In this update:
- Custom LED models. Create and save your own LED specifications with threshold or voltage-current table simulation methods.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.07 2025. 07. 04.
In this update:
- [PRO] Platinum RTD calculator.
- Updated the formulas for calculating wire ampacity in the AWG calculator.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.05 2025. 05. 01.
In this update:
- [PRO] Ability to specify arbitrary analog signal range bounds in 4-20 mA current loop calculator.
- Ability to sort saved datasheets in library.
- Pinout of IEEE 1394 / FireWire interface.
- Minor update of Raspberry Pi pinouts.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.02 2025. 02. 16.
In this update:
- When using iOS 17 or newer, the ESR tables reference of electrolytic capacitors will have an updated look with ability to show ESR values only for specific operating voltages or capacitances.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
25.01 2025. 01. 13.
In this update:
- Pinout of Flipper Zero.
- Fixed error in images of NOT and BUFFER logic gates.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.12 2024. 12. 17.
In this update:
- [PRO] Passive Filters calculator shows formulas used to calculate the signal magnitude.
- Ability to add PDF files from external sources to Datasheet Library.
- Fixed alignment of pins depiction in DVI pinouts.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.11.3 2024. 11. 27.
In this update:
- When using iOS 18, any list of electronic schematic symbols can be translated into the app's current language.
- Internal stability improvements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.11.2 2024. 11. 10.
In this update:
- When using iOS 18, any list of electronic schematic symbols can be translated into the app's current language.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.11 2024. 11. 10.
In this update:
- Pinout of LubanCat 4 single board computer.
- Internal optimizations.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.10.2 2024. 10. 06.
In this update:
- [PRO] Ability to add tags for saved datasheets.
- [PRO] Current loop calculator supports other analog signal types besides the 4-20 mA.
- Other small improvements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.10 2024. 10. 01.
In this update:
- New pinouts of various boards based on ESP8266 chip.
- Application icon supports iOS 18 dark and tinted modes.
- Possibility to view additional information about SOT or diode package at SMD packages chart.
- Other small improvements.
Big thank you to everybody who subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.
Regards,
Rostyslav
24.09 2024. 09. 15.
- [PRO] 태양광 스트링 설계. 패널 사양, 온도 계수, 설치 장소의 최저·최고 온도로부터 PV 어레이에 필요한 충전 컨트롤러 또는 인버터의 최소 전압 및 전류 정격을 구합니다.
- [PRO] 케이블 및 퓨즈 선정. NEC 또는 IEC 규칙에 따라 PV 어레이의 도체 단면적과 스트링 퓨즈 및 단로 장치의 정격을 선정합니다.
- RMS 변환기. 일곱 가지 파형에 대해 전압 또는 전류의 피크값, 실효값, 피크 투 피크값을 서로 변환하고 각 파형의 파고율과 평균값을 표시합니다.
- 새로운 핀아웃: Ethernet PoE, ATmega328P, ATtiny85, ATtiny84A, ATmega32U4, ATmega4809.
앱의 PRO 버전을 구독하거나 구매해 주신 모든 분께 진심으로 감사드립니다. 여러분의 지원이 이 앱을 더욱 발전시키는 데 큰 도움이 됩니다. 이 앱이 마음에 드셨다면 평가와 리뷰를 남겨 주세요.
감사합니다,
Rostyslav
더 보기 버전 26.08 1일 전
사용자에게 연결되지 않은 데이터 다음 데이터가 수집될 수 있지만 신원에는 연결되지 않습니다.
지원되는 기능
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