# Resistor Scanner

> Image-based resistor detection

Canonical page: [https://chrome-stats.com/d/com.mhdev.resistorscanner](https://chrome-stats.com/d/com.mhdev.resistorscanner)

## Overview

- **ID:** `com.mhdev.resistorscanner`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** MhTechDev
- **Category:** TOOLS
- **Downloads:** 833,409
- **Rating:** 2.58 / 5 (2,432 ratings)
- **Version:** 4.5.2
- **Last updated:** 2025-06-09
- **First published:** 2016-12-07
- **Publisher country:** DK
- **Size:** 12 MB
- **Data as of:** 2026-09-17
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.mhdev.resistorscanner)
- **Website:** [https://mhtechdev.com](https://mhtechdev.com/)
- **Privacy policy:** [https://mhtechdev.wixsite.com/mhtechdev/policy](https://mhtechdev.wixsite.com/mhtechdev/policy)

## Description

Resistor Scanner is a handy Chrome extension designed to simplify the process of identifying resistor values through image recognition. Instead of manually decoding resistor color codes, users can point their phone camera at a resistor to instantly get its resistance value. The tool offers automatic detection that locates the resistor and analyzes its color rings without requiring precise alignment (horizontal placement needed in the free version).

Key features include live detection for real-time resistance reading, manual correction by tapping and holding to adjust misread rings, a manual mode to select ring colors directly, and the ability to detect multiple resistors at once. Additional controls such as brightness and zoom sliders, touch to focus, and the option to load images from the gallery provide flexibility and accuracy. This extension is ideal for electronics enthusiasts, students, and professionals who need a quick and reliable resistor value reader.

## Rankings

- #75,978 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.CAMERA`
- `android.permission.INTERNET`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.WAKE_LOCK`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.android.vending.BILLING`
- `com.google.android.c2dm.permission.RECEIVE`
- `com.mhdev.resistorscanner.permission.C2D_MESSAGE`

## Review summary

The app has a promising idea and can aid colorblind users with resistor value identification, aided by zoom/exposure controls and batch readings. However, reliability is a major drawback: frequent crashes, inconsistent results, and camera/lighting sensitivity (glare, white balance) lead to misread colors. Calibration and stability improvements are needed for practical use across devices and environments.

### Pros

- Helpful identification of resistor values, especially useful for colorblind users.
- Zoom and exposure controls help readability and accuracy when lighting is good.
- Can read multiple resistors at once and show values for all.
- Strong concept and generally useful/relatively accurate in favorable conditions.

### Cons

- Frequent crashes and instability; sometimes won't run at all.
- Highly lighting-dependent; glare, flash glare, and white balance issues degrade results.
- Colors detected incorrectly (e.g., brown read as black) and no calibration.
- Results vary across devices/backgrounds; inconsistent across scenarios.
- Background and lighting requirements make it unreliable in typical conditions.

## Similar extensions and apps

- [Resistor Scanner (Donate)](https://chrome-stats.com/d/com.mhdev.resistorscannerdonate) — 477 users
- [Resistor Scanner Codice Colori](https://chrome-stats.com/d/com.fsmaker.riconoscimentoresistenze) — 98 users
- [Resistor Scanner (beta)](https://chrome-stats.com/d/noldyLabs.resistorscanner) — 79,400 users, 2.50 / 5
- [Resistor Vision - Color Code](https://chrome-stats.com/d/com.chubos.resistorvision) — 153 users
- [Resistor Plus](https://chrome-stats.com/d/com.utility.ResistorPlus) — 22 users
- [Resistor Color Code Scanner](https://chrome-stats.com/d/at.austriao.resistor_scanner) — 35,514 users, 1.94 / 5
- [ResistorApp](https://chrome-stats.com/d/com.tafsystems.resistor) — 66 users
- [Electronics lab](https://chrome-stats.com/d/com.akbah.electronics_lab) — 3,358 users
- [Resistor](https://chrome-stats.com/d/com.microsys.ResistorFree) — 1,062 users
- [Resistor Code Helper Pro](https://chrome-stats.com/d/com.kidshandprint.resistorcolorcodepro)
- [Resistor Code Helper](https://chrome-stats.com/d/com.kidshandprint.resistorcolorcode) — 148 users
- [Código Color Resistencias](https://chrome-stats.com/d/com.resistencias.codigocolores) — 120 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/com.mhdev.resistorscanner)