The Best Circuit Scanner of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Circuit Scanner of 2022. Check our ranking below.

2,791 Reviews Scanned

Rank No. #1

VDIAGTOOL V210 Wire Tracer Electrical Automotive Open & Short Finder Circuit Tester Circuit Breaker Finder Fault Probe Wire Tracker Electrical DC 6-42V

【OPEN&SHORT CIRCUIT FINDER&TRCING WIRE】VDIAGTOOL V210 automotive open & short finder circuit tester powered by 2pcs 9V batteries performs easily locating the circuit breaker point, open connections, broken wires, current leaks with tone change, even trace wire/cable without damaging the insulation. This is a convenient and efficient circuit tracer kit for DIYers, electricians, and technicians, to simply and quickly judge the continuity of the cables/wire and diagnose the breaker point. *NOTE: Designed for 6-42V DC.
【LOCATING BREAKER POINT EFFICIENTLY】V210 circuit breaker finder tool comes with transmitter and receiver LEDs showing open or short circuit conditions. The Built-in buzzer sound of the signal receiver helps you immediately and easily locate open connections, broken wires, current leaks, and even trace wires.Note: Signal strength affects volume. If the sound is low, try adjusting the probe position to find a stronger signal for accurate detection.
【CHECKING SHORT CIRCUIT】V210 Automotive Short Circuit Finder allows you to find intermittent circuit problems by flexing wires or connectors and listening for a change in the receiver tone without damaging the insulating layer. Receiver with adjustable sensitivity via knob and flexible 7”Probe. Note: The sound signal may be affected by propagation,resistance, shielding, and circuit complexity. To improve accuracy, check wiring step-by-step and complete signals to pinpoint the exact short.
【1 YEAR WARRANTY, 24/7 TECH SUPPORT, 60 DAYS NO QUESTION ASKED RETURN/REFUND】We offer 1 Year Warranty, Lifetime technical support, 60 Days No-Question-asked NEW REPLACEMENT OR REFUND. Any questions or concerns with the V210 wire tracer electrical, please reach us via vdiagtool2 @ outl ook c om.
【IMPORTANT TIPS】This electrical circuit tracer comes with 2pcs 9V Batteries for receiver & transmitter. When the signal is not strong enough, the volume will be low in the receiver, please find a strong signal and try to turn the signal up to the highest level; checking whether the battery power is sufficient at the same time, since it will effect the tool working properly. When the V210 wire locator is not used, please leave it in the OFF position or remove the batteries directly to avoid draining the power.

Rank No. #2

Autel PowerScan Automotive Circuit Tester, Power Circuit Probe Tool, 12-24V Electrical Short Open Breaker Circuit Finder, AC/DC Current Resistance, Duty Cycle, & 20FT Extension Cord, for 99% Cars

🥇【2025 ALL-IN-ONE POWER CIRCUIT TESTER KIT---ACCURATELY】Autel Circuit Tester is most accurate power circuit probe tester yet, with 160x128 TFT display test all 6-30 volt vehicle electrical systems. It supports ✅Voltage&Polarity Test✅Continuity Test✅Signal Circuit Test✅Components Activate✅Check Bad Grounding✅Locate Short Circuits✅Short-circuit Protected✅Circuit Breaker Protection, etc. Besides, Autel Power Circuit Tester has extra long Cables (itself with 20ft, and extra with 20ft cable), also comes with a cigarett.e lighter plug. Intuitive interface with ergonomic design makes it be best gif.t for all novice drivers or pro circuit repairers.
🥇【ADVANCED FOUR WORKING MODE---INTUITIVE&EASY】Four working modes make circuit detection more simple. DC Voltage, AC Voltage, Resistance, Tone On/ Off. 1) DC Voltage mode can read DC voltage with 0.1V resolution. 2) AC Voltage can get Min & Max voltage, duty cycle and frequency quickly. 3) Resistance mode to read resistance between tip and auxiliary ground wire. 4) Unique Tone On/ Off Design is really useful when working in dim areas, it can judge the circuit voltage according to the volume of the sound.
🥇【COMPONENT ACTIVATION & TEST】This Autel automotive power circuit probe tester can activate components on/off-board electrical system/ equipment, is designed for car technician or car enthusiasts. By activating the signal generated by the component, you can accurately judged whether the component is intact, such as blower motor, power window motor, windshield wiper, rear window defroster, lights, radiator fans, fuel injectors, etc. Autel circuit tester automotive tool can activate component in your hand/ in the vehicle/ with ground etc.
🥇【INSTANT IDENTIFY POLARITY】Autel Car Circuit Tester instantly checks component continuity and quick identifies positive, negative and open circuits. When the positive terminal is connected, red LED lights up with beep sounds. When the negative terminal is connected, green LED light up with a low tone. If an open circuit, neither of LED light will not light. The indicator light is a considerate working guide to facilitate the smooth operation of detection.
🥇【CONTINUITY TEST, SIGNAL CIRCUIT TEST】Autel Electrical System Probe Tester can test the state of sensors, quickly and accurately judge the connectivity of circuit via transmit signal, performing continuity test. Two ways to test continuity: ✅1: In resistance mode, if the resistance is 0.0Ω and the LED lights up, it means continuity. ✅2: Power up the connection using the power switch, if the circuit brea-ker tr-ips, that means the resistance is low and there is continuity.

Rank No. #3

Chazcool Circuit Tracer, Automotive Short Circuit Finder, Wire Tracer, Automotive Short and Open Finder Repair Tool EM415PRO DC 6-42V

Check for Short Circuit: Circuit breaker finder has emitter and receiver LEDs display open or short circuit conditions. You can diagnose and determine intermittent circuit problems by listening to changes in the continuous audio from the receiver
Locate Open Circuits: The circuit breaker finder tool used for locating open circuits, detecting short circuits, wire identification, etc. Adjustable sensitivity for fast and easy targeting of broken lines
Suitable for DC 6-42 Volt Circuit Power Supply: The circuit tracer will operate on a variety of circuits, ranging from 6 volts to 42 volts DC. Widely used in short circuit detection, open circuit positioning, wire tracking, wire identification, etc
Simple and Fast Diagnosis: The breaker finder has 7 inch flexible probe which can help reaching the wire in congested places, and accurately determine the continuity of the cable or wire, and diagnose the fracture point
Safe and Portable: The circuit breaker finder has a wide operating voltage range and internal protection against power surges and overloads. Circuit breaker detector with storage bag, easy to carry. Requires 2 9V batteries for power supply (not included)

Rank No. #4

allsun EM415Pro Automotive Wire Tracker, Short and Open Circuit Finder Tester, Cable Toner for DC 6-42V, Car Electrical Diagnostic Tool with Flexible Probe, Wire Break Locator and Short Finder

【ALL-IN-ONE SHORT CIRCUIT FINDER & WIRE TRACER】The circuit breaker finder upgrade your toolkit with this professional Short Finder and Wire Tracer. It's engineered to perform as a Circuit Breaker Finder, precisely locating shorts, opens, and breaks. The transmitter's LED gives a clear visual alert for shorts, while the receiver's audible tone guides you directly to the fault, making it an indispensable Automotive Short Circuit Finder.
【WIRE TRACING & CIRCUIT CONTINUITY TEST】Cable tracker emits a traceable signal, allowing you to follow and identify specific wires in complex harnesses or congested areas. It also functions as a reliable continuity tester, verifying the integrity of circuits and cables from 6V to 42V DC. It's the ultimate Automotive Circuit Tester and Broken Wire Detector Tool you need in your Automotive Electrical Tools collection.
【FLEXIBLE PROBE FOR HARD-TO-REACH DIAGNOSTICS】The wire tracer tackle tight spaces with the 7-inch flexible probe, a key feature for any Circuit Breaker Finder Tool used in cramped engine bays or behind dashboards. This key feature of our Circuit Breaker Finder Tool allows you to bend and position the tip perfectly for optimal signal pickup from the Wire Break Locator, ensuring accurate diagnostics where other rigid tools cannot reach.
【ELECTRONIC SHORT FINDER WITH AUDIBLE & VISUAL ALERTS】 The relay tester get immediate, unambiguous feedback with our advanced Short Finder. The system provides a variable audio tone that changes with signal strength and bright LED indicators, helping you zero in on problems fast. This intuitive dual-alert system makes it a superior Short Circuit Finder and essential Circuit Tester for both professionals and DIY enthusiasts.
【AUTOMOTIVE ELECTRICAL DIAGNOSTIC TOOL】This is a Short Circuit Finder and diagnostic companion for cars, trucks, boats, and RVs. As a multi-functional Automotive Circuit Tester, it consolidates the need for multiple specialized Automotive Electrical Tools into one powerful, portable device. (Important: For vehicle DC systems only. Not for use on household AC circuits or ignition systems.) Includes a convenient storage bag.

SaleRank No. #5

VDIAGTOOL V200 Pro Automotive Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars

【ALL-IN-ONE TOOL FOR ANY CIRCUIT PROBLEM DIAGNOSIS】V200 Pro covers all circuit tests: ✔Circuit Breaker/Open Test ✔Tracing Wire ✔AC/DC Voltage Test ✔Diode Test ✔Resistance Test ✔Polarity Test ✔Continuity Test ✔Ground Test ✔Activate Components ✔Signal Circuit Test ✔Relay, Fuse, Trailer Light Test. You can quickly & easily Locate short circuits, open connections, broken wires, current leaks and even trace wires. Get this essential circuit tester today and save your time and costly trip to a dealership!
【COMPREHENSIVE POWER CIRCUIT TESTER】Switch to Mode I, you’ve just activated Power Circuit Probe Tester which supports 4 working modes:AC/DC Voltage, Resistance and Diode. The electrical probe tester allows users to check 12V 24V electrical system instantly, tells you whether the wire or circuit is live, and which side of the circuit you are on, positive or negative. NOTE: This circuit tester can be powered by either connecting to cigarette lighter/vehicle’s battery,no external battery needed!
【LOCATING BREAKER POINT EFFICIENTLY】Switch the V200 Pro All-In-One Circuit Tester Kit to Mode II, you will be able to use the breaker finder which can easily locate the circuit breaker point, open connections, broken wires, current leaks with tone change, even trace wire/cable without damaging the insulation. This circuit breaker finder tool works on all kinds of vehicle circuit issues such as those found in car, SUV, mini van, truck, tractor, boat & RV, with voltages between 6 and 42 volt DC.
【COMPONENT ACTIVATION & SENSOR/SIGNAL CIRCUIT TEST】VDIAGTOOL V200 Pro power circuit probe kit can generate activation signals to electrical components like car lights, motors, windshield wipers, radiator fans, relay, fuel injector and etc to troubleshoot electrical problems; locate auto short circuits if you keep getting blown fuses and also test various sensors, signal circuits to pinpoint the root cause to electrical issues when you have extracted DTCs from vehicle ECUs.
【OVERLOAD PROTECTION TO PROTECT CAR ELECTRONICS】 This automotive electrical tool comes with short circuit protection. Whenever it gets overloaded, it just gonna shut down and restart, which is a safe measure to protect the device and car electronics. Useful Tip: You can also use overload protection feature to test short circuit conveniently. NOTE: If you received defective unit or it malfunctions, please reach us via ✔vdiagtool2 @ outl ook c om for hassle-fr*ee replacement any time!

SaleRank No. #6

ANCEL PB100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable

【All-in-One Power Circuit Tester for 6–30V Systems】The ANCEL Electrical Tester provides a complete solution for diagnosing vehicle electrical systems, supporting Voltage & Polarity Checks, Continuity Testing, Signal Circuit Verification, Component Activation, Bad-Ground Detection, and Short-Circuit Locating with Built-in Circuit Breaker Protection. Its clear display, intuitive interface, and extended cable setup—20ft integrated lead plus an extra 20ft extension and a cigarette-lighter adapter—allow you to work comfortably around the entire vehicle. Designed for both beginners and experienced technicians, it delivers accurate, efficient electrical troubleshooting in one versatile tool.
【Advanced 4-Mode Circuit Diagnostic Tool】The ANCEL PB100 Power Circuit Probe Tool combines four essential test modes—DC Voltage, AC Voltage, Resistance, and Diode—allowing you to quickly check power, trace signals, read min/max voltage, and measure frequency, or verify ground and continuity with ease. Its intuitive buzzer function helps identify circuit conditions even in dark or tight spaces. Replacing multimeters, test lights, jumper wires, and fuse testers, this all-in-one probe gives you fast, accurate answers for most electrical issues, from battery faults to trailer lights and relays.
【Component Activation & Test】This automotive power circuit tester lets you activate and test on-board and off-board components with ease. It supports a wide range of vehicle systems, including blower motors, power window motors, windshield wipers, rear window defrosters, lights, radiator fans, and fuel injectors. By sending the required signal to each component, you can quickly determine whether it is functioning properly. Designed for both professional technicians and DIY enthusiasts, the tool works hand-held, in-vehicle, or with grounded connections, providing fast, accurate diagnostics and making electrical troubleshooting simple and reliable.
【Short-Circuit Tracking & Overload Protection】Equipped with high-sensitivity probes, this ANCEL electrical system tester quickly tracks wiring issues and pinpoints short circuits or faulty wires to save serious troubleshooting time. Its resettable 10A circuit breaker protects both you and the vehicle by cutting power and sounding a buzzer when overload is detected. When tripped, the tool will not conduct battery current to the tip until reset—helping you avoid blown fuses and unnecessary repair costs.
【Quickly Identify Polarity & Highly Sensitive Probe】The ANCEL PB100 Automotive Circuit Tester instantly checks component continuity and identifies positive, negative, and open circuits. When the positive terminal is connected, the red LED lights up with a beep; when the negative terminal is connected, the green LED illuminates with a low-pitched tone. Open circuits show no LED indication. Using red/green LEDs (active within ±0.8V) alongside the LCD display, the PB100 enables fast voltage detection—turning a simple polarity check into a reliable diagnostic tool.

Rank No. #7

Automotive Circuit Tracer & Wire Tracker 6-42V DC Wire Short Finder, Circuit Tracker, Circuit Tester & Circuit Scanner for Car, Boat, Trailer - Open/Short Circuit Detection Tool EM415PRO

🔍 𝐀𝐜𝐜𝐮𝐫𝐚𝐭𝐞𝐥𝐲 𝐃𝐞𝐭𝐞𝐜𝐭𝐬 𝐒𝐡𝐨𝐫𝐭𝐬 𝐚𝐧𝐝 𝐎𝐩𝐞𝐧 𝐂𝐢𝐫𝐜𝐮𝐢𝐭𝐬: Easily locate broken or damaged wires, short circuits, and open connections in any DC 6–42V automotive system. Perfect for diagnosing electrical issues in cars, motorcycles, trailers, RVs, and boats.
📡 𝐍𝐨𝐧-𝐈𝐧𝐯𝐚𝐬𝐢𝐯𝐞 𝐖𝐢𝐫𝐞 𝐓𝐫𝐚𝐜𝐢𝐧𝐠: Trace wires hidden behind dashboards, panels, carpets, or inside engine compartments without removing insulation. The transmitter sends a signal, and the probe follows the path precisely — saving time and effort.
⚡ 𝐐𝐮𝐢𝐜𝐤 𝐚𝐧𝐝 𝐑𝐞𝐥𝐢𝐚𝐛𝐥𝐞 𝐂𝐨𝐧𝐭𝐢𝐧𝐮𝐢𝐭𝐲 𝐓𝐞𝐬𝐭𝐢𝐧𝐠: Check the continuity of wires and cables in seconds using the “CONT” mode. Ensure smooth and complete electrical flow to avoid costly misdiagnoses during repair.
🧰 𝐀𝐥𝐥-𝐢𝐧-𝐎𝐧𝐞 𝐃𝐢𝐚𝐠𝐧𝐨𝐬𝐭𝐢𝐜 𝐊𝐢𝐭 𝐰𝐢𝐭𝐡 𝐀𝐜𝐜𝐞𝐬𝐬𝐨𝐫𝐢𝐞𝐬: Comes fully equipped with a signal transmitter, receiver probe, test leads, alligator clips, 9V batteries, insulation tape, and a protective carrying case — everything you need for on-the-go diagnostics.
💼 𝐂𝐨𝐦𝐩𝐚𝐜𝐭, 𝐃𝐮𝐫𝐚𝐛𝐥𝐞, 𝐚𝐧𝐝 𝐄𝐚𝐬𝐲 𝐭𝐨 𝐔𝐬𝐞: Designed for both professionals and DIYers, this lightweight kit features a flexible 7-inch probe for tight spaces, intuitive controls, and a durable build that’s ready for everyday use in tough environments.

SaleRank No. #8

1 Set Automotive Wire Short for Finder Cable Tester Circuit Detector Car Circuit Scanner Tracer EM415PRO Scanner Diagnostic Tool for BoatDC 6-42V

Easy to use: simply connect the transmitter in series with the circuit or wire under , (.: in place of a blown fuse, a connector,in series with an wire, a light bulb socket, etc.), and scanning the circuit/wire with the tracers flexible probe to find the spot
Tracing of wires is made possible even inside bundles, conduits, behind panels, under carpets, upholstery, etc
This instrument is designed to identify and trace wires or cables without damaging the insulation. You can also use it to check short circuit and loacting circuit and so on. There are a Sender and a Receiver included in the instrument.
and High Quality!
6-42 V : for use in the of vehicles with mixed or single 42 Volt

Rank No. #9

Autel PowerScan PS100 Automotive Circuit Tester 2.0, 12-24V Power Circuit Probe Tool, Auto Electrical Short Open Circuit Finder, AC/DC/Resistance/Component/Signal/Test Tool, w 20ft Extension Cable

📢【Please Note Before Purchasing】⚠️For any technical or after-sa.les questions, please feel fr-e.e to co.nta.ct us: 💌 autelchoice @ outlook. com 💌.
👍【2025 Autel Power Circuit Probe Kit US Ver 2.0】Autel PowerScan PS100 is the best Electrical Tester for reducing diagnostic time in all 6-30V vehicle electrical systems. Support✅Test Voltage & Polarity/ Continuity/Signal Circuit✅Activate Components in Your Hand/in the Vehicle/ w/Ground✅Test Trailer Lights and Connections✅Tracking Short& Open circuits✅Find Bad Ground✅Circuit Breaker Overload Protection✅Red/Green Polarity LED & Voltage Drop✅20ft +20ft cable. Compared with test lights and multimeters, PS100 provides faster, intuitive diagnosis with extended data display (AC/DC, resistance, diode) while also enables component active testing and short circuit tracing through its circuit breaker.
👍【4 Advanced Modes—Quick& Accurate】4 modes via Mode Button. Just Contact probe to circuit, LCD instantly displays results: 1️⃣DC voltage: read the DC voltage with a resolution of 0.1 volts. 2️⃣AC voltage: read the Max. voltage, the Min. voltage, frequency, and duty cycle, shows the modulation from the ECM to an Alternator wire to see if the ecm is commanding the alternator on. 3️⃣Resistance: read the resistance between the tip and auxiliary ground lead, you can clearly check fuse/line continuity, pinpoint open circuits & verify switch functions. 4️⃣Tone On/Off: it can indicate the tester's on/off status, You can turn it off to avoid ear interference from noise during testing.
👍【Compnent Activation Function】Autel PS100 Electrical Fuse Tester will test the positive, negative, and open circuit easliy, also testing for continuity, diagnosing circuit failures, checking good and bad grounds, easy to read AC/DC current activating components on and off the vehicle, sensing MIN /MAX voltage, etc. By generating activation signals for the components, Autel Circuit Tester Automotive Tool can judge whether the components are in good condition, such as lights, motors, wipers, radiator fans, relays, etc. No jumper wires are required, making the process of diagnosing your car's circuits safer, faster, easier, and less prone to error.
👍【Pro Continuity Tester & Signal Circuit Tester】PS100 easily locates wire breaks and checks ground quality.1️⃣ Resistance Mode: Connect the probe tip and ground lead. A solid connection reads “0.0Ω” with a green LED. “OL” means an open circuit. You can even pierce insulation to test without disconnecting wires.2️⃣ Power Switch Method: Applies voltage to check for ultra-low resistance—great for ground tests. What to do when faced with reading a DTC to learn that a sensor may have a problem? 📶Signal Test: In AC mode, connect to the sensor’s signal wire and ground. As you operate the sensor, view live Max/Min voltage, frequency, and duty cycle on the LCD to confirm proper function.

Rank No. #10

Automotive Circuit Tester, Car Repair Cable Circuit Wire Tracers Analyzer Short Open Finder Fault Tester Electrical Checker Detector Probe DC 6-42V Car Diagnostic Tool

EASY TO USE: The Open Wire Detector With transmitter and receiver LEDs, you can quickly identify open or short circuit situations, making this tool extremely user-friendly
RELIABLE SHORT CIRCUIT VERIFICATION: The Electrical Circuit Tester Automotive verification of short circuits is made easy with this product. You can easily identify whether there is a short circuit or not, giving you peace of mind
ADJUSTABLE PROBE LENGTH: The Short Circuit Finder is equipped with an adjustable 7" supple probe, providing flexibility to reach difficult areas. This feature makes this product a must-have for professionals and DIY enthusiasts alike
CONVENIENT SENDER FEATURES: The Electrical Circuit Tracer comes with red and black test leads cables and a tone/off/continuity switch, making it easy to use. With tone/continuity LEDs and a 61cm length, you can quickly identify wires and test continuity
DURABLE AND LONG-LASTING: This Automotive Short Circuit Tester is made to last, constructed with high-quality materials that can withstand the wear and tear of everyday use. Invest in this tool today and have confidence in its durability for years to come

Last update on 2025-12-03 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best Circuit Scanner?

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We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Circuit Scanner that you consider buying. Your questions might include the following:

Is it worth buying an Circuit Scanner?
What benefits are there with buying an Circuit Scanner?
What factors deserve consideration when shopping for an effective Circuit Scanner?
Why is it crucial to invest in any Circuit Scanner, much less the best one?
Which Circuit Scanner are good in the current market?
Where can you find information like this about Circuit Scanner?

We’re convinced that you likely have far more questions than just these regarding Circuit Scanner, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Circuit Scanner, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Circuit Scanner. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Circuit Scanner buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Circuit Scanner currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of Circuit Scanner has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an Circuit Scanner?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Circuit Scanner.
Customer Ratings: Number ratings grade Circuit Scanner objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Circuit Scanner.
Product Quality: You don’t always get what you pay for with an Circuit Scanner, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Circuit Scanner is should be an indication of how long it will work out for you.

We always remember that maintaining Circuit Scanner information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

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FAQ:

Q: What is a scanner used for?

A: Working of Scanner What is a Scanner? A scanner is a device that is used for producing an exact digital image replica of a photo, text written in paper, or even an object. This digital image can be saved as a file to your computer and can be used to alter/enhance the image or apply it to the web.

Q: What is a drum scanner?

A: Drum scanner was the first ever image scanner to be developed. It was made in the year 1957 at the US National Bureau of Standards. The first image was black and white with a resolution of 176 pixels. This scanner is mainly used in the publishing industry. The technology used behind the scanning is called a photomultiplier tube (PMT).

Q: How to use a handheld scanner?

A: Hand-held scanners are used to scan documents by dragging the scanner across the surface of the document. They are available as document scanners as well as 3-D scanners. This scanning will be effective only if with a steady hand technique, or else the image may seem distorted.

Q: What is the working principle of a scanner?

A: Most scanners use a cold cathode fluorescent lamp (CCFL). A stepper motor under the scanner moves the scanner head from one end to the other. The movement will be slow and is controlled by a belt. The scanner head consists of the mirrors, lens, CCD sensors and also the filter.