Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919






Robot Building for Beginners

A beginner’s book on how to build a robot, from the author of Robot Room. Contains tricks, tips, and advice on getting started creating your own robots from scratch. THIRD EDITION!

Intermediate Robot Building

Learn how to make a robot power supply, compare motor driver circuits, create an infrared obstacle / wall / opponent sensor, play music, and much more. SECOND EDITION!


What’s New? (Follow @RobotRoom on Twitter)
New Articles on Patreon
There are at least 30 new Robot Room articles available for patrons. Click here to check them out:



Goodbye Google Adsense!
I've removed Google Ads from Robot Room. Why?


5V Regulator Cap for 9V Battery
For quick portable projects and temporary hacks, it is often faster to reuse a simple 5V regulator circuit than to integrate a power supply into the device design. My toolbox has an LED tester and magnifier light, so why not add a convenient 5V regulator cap to the collection? There are nicer ones on the market that have surface mount components, but half the fun of an electronics hobby is creating something basic in your own style. This double-decker board with flashing LED power indicator allowed me to experiment with flush battery snaps and board interconnects.


Mercury Battery Replacement Regulator
Several decades ago, mercuric oxide button cells were common consumer power sources. Mercury was phased out due to environmental concerns, leaving behind vintage photographic equipment and watches that were incompatible with alkaline's wide voltage change or silver-oxide's slightly higher nominal voltage. Tinkerers have come up with a variety of solutions for many devices. Perhaps modern technology can address a few more with an itty-bitty 1.35V low-dropout linear regulator.
3D Printed Spool and Wire Soldering Holder
Buying new wire begs the question of what type of insulation to choose. PTFE is selected since it doesn't tend to melt back as common PVC wire insulation does. The new wire arrives without a spool, which necessitates printing a spool on a three-dimensional printer. The spool is easy enough to model but consumes the day with a six-hour print time. Soldering the newly acquired wire to another wire is frustrating with the classic misaligned 'helping' hands tool. Thus, old-fashioned wooden clothes pin attached to a base become the project being worked on rather than whatever I needed that wire for in the first place.
Generating Waveforms with Paper Discs
In a pinch, you can generate square, sawtooth, sinusoidal, triangular, and noisy/static waveforms by playing a patterned disc on a record player or spare motor using a light sensor. An LED illuminates the paper disc, which reflects varying amounts of light into the light sensor as the disc rotates on the turntable (see the video for a demonstration.) The circuitry is fairly simple and uses commonly found parts. Can you guess the waveform generated by the thumbnail image?
Resistor Forming Tool
Who hasn't looked at a classic red resistor lead forming tool and exclaimed "I could 3D print this!" I took a shot at designing and printing a few variations. The end result is a functional tool with a couple of improvements, but not as crisp, due to the limitations of home fused-filament resolutions.
Upgrading Magnifying Desk Lamp to LEDs
Circular T9 LED bulbs are available to replace fluorescent bulbs in desk lamps. LEDs provide a broader spectrum of light, which is particularly important if you are shooting macro photographs, but is also easier on your eyes if you're soldering or inspecting boards. Unfortunately, the commercial LED bulb I received was defective and had a flickering power supply. Hacking in six additional smoothing capacitors and replacing a missing LED solved the problem.

Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919 - ganbaruzoi.club

Identifying Bad Capacitors
If your consumer electronic device is failing, it is often caused by old, overheated, or defective capacitors. If you open up the case and inspect the capacitors, you may find some that are bulging, crusty, or are lifting off the PCB. Here are some photographs of damaged CapXon brand aluminum-electrolytic capacitors found inside failing Samsung LCD monitors. Also included is a photo of a good capacitor that has beneficial goop surrounding it.
How *Not* to Cast and Machine Bismuth
Bismuth is a high-density non-toxic metal that forms beautiful crystals. Well, supposedly it forms beautiful crystals, just not for me. See examples of clay casting failures and chipped surfaces as I muddle my way through trying to make anything out of bismuth.

Sun Tracker Failed Project
Sometimes you gotta know when to walk away -- which was eight years ago. I dug up this robot that was supposed to emulate a sunflower tracking the sun. Due to a design flaw in an overly complicated analog sensor bus, and general ugliness, this project got literally shelved. Now it sees the light of day, if only to be a lesson to others.
Mounting an iPad for Desk-Based YouTube Videos
For many hobbies, an overhead shot of your desk or workbench is the ideal view for your videos. This is unwieldy for tripods, but suitable for a desk swing arm. Similar to a desk-mounted magnifier light, the camera can be quickly positioned at various distances, and can be swung away when not in use. The single arm does not tend to block room lighting. Take a look at my tablet-mount setup, and see how the arms were extended to fit a larger form factor.
Macro Photo vs Microscope
Fifteen years ago, I proudly photographed a PCB using an Intel QX3 toy microscope. How well does that old microscope compete against a modern 16 megapixel camera with macro lens, extension tubes, tripod, linear table, linear slide, remote shutter, 28 LED ring light, and stacked photography software? Can such a photo setup match the microscope's 200x magnification? In fact, exactly small of details can we clearly see with a modern rig? Would you believe 10 µm?
3D Printed Trimpot Thumb Dial
Create your own colorful finger-friendly dials for common trimmer potentiometers. With a little slot that press-fits into the screwdriver slot, and a dab of emblem adhesive, these home printed dials will make your projects much easier to adjust.
LED Tester with Display
Throw away your multimeter and spreadsheets, here is a self-contained current-limited LED tester that displays LED voltage drop, current, and recommended resistor. With about $10 in parts and a 9V battery, this indispensible tool is tailored for the everyday tasks of the electronics enthusiast.
Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919 The TGIMBOEJ Curse
Remember that thing you were going to get to? Well, it took me seven years to ship a package. No kidding. What's inside? Are there more like that? (Yes, 144) Come closer to hear the tale of The Great Internet Migratory Box Of Electronics Junk.
Replacing Broken Tip of IC Hook Probe
Arg! The multimeter measurements are wrong because the probe detached from the circuit because the IC hook tip broke, again! I go through far too many broken IC hooks to keep throwing them away. Is it possible to 3D print a replacement tip? Is this an opportunity to improve the tip to be more robust?

Leveling A 3D Printer
How to accurately set the extruder nozzle height above the print bed when leveling a 3D printer. Use a thickness gauge, magnet, and a multimeter in continuity mode to beep when the print head makes contact. Includes a trick to clean the tip of the nozzle by scraping it with the zinc interior of a penny.

Printed Circuit Board Survey
What features do hobbyists, students, and small shops look for in a PCB manufacturer? Do people care about lead free? What about board shape and internal cutouts? Is board color important enough to offer as an option? Find out the results of the PCB survey...

PCB Motor Mount
If you don't have a home machine shop or 3D printer, you can make a motor mounting bracket from a PCB. Printed circuit boards are strong, lightweight, precise, and are easily manufactured. The PCB bracket can then be attached to your project using screws, straight solder, right-angle headers, or dual-row headers. The video in the article shows you the process step-by-step, including how to make the board non-rectangular and how to place screw holes at angles.

Better Etching of Homemade PCBs
You consistently create homemade PCBs with traces as fine as 6 mil traces, using common household objects, such as sandpaper, cleanser, aluminum foil, and a clothes iron. I test various chemicals, temperatures, and pressures to determine how to make circuits with minimal voids, distortion, and fills.
PCB Hole Sizing
How big of a hole do you need drilled in a printed circuit board to fit a part? Don't just measure the part with calipers and use that for the hole size! You must make the hole larger to account for the tolerances of the part and the circuit board manufacturer. Of course, that brings up the question of how much can you trust the size of the holes the manufacturer is drilling. Let's see what pin gages say about some of the boards laying around the robot room.
Hamming ECC
Error correcting code (ECC) is superior to ordinary checksums, in that is can both detect and correct errors in data storage and transmission. Learn how Hamming codes work. Fully working C library included.

Thermal Imaging
Infrared pictures and images can reveal energy waste, health issues, security codes, animal behavior, and circuit board flaws. It is also a great way to cheat at hide-and-go-seek. Take look at a gallery of fascinating thermal images taken with the Flir E4 infrared camera. Additionally, there is a video of a power-supply heating up, as well as desoldering wires.

Rocket Ignition System
The problem with most model rocket launch controllers is that the battery is located with the operator, far away from the launch pad. This requires thick cables and wastes significant energy. By locating the battery near the rocket engine and using a remotely-controlled relay, the improved launch system is more efficient but can still be built at home. Includes complete schematics, the pcb layout, and source/object code.
Back And Forth Mark II
The single motor drive train on the original Back And Forth robot was unique but a failure. To overcompensate, the next generation is four wheel drive and six switches just to move forward and move back, repeatedly. There are some nice mating parts that may be useful in your next project. And, you'll be surprised to see what's inside the half-height batteries.

Maximum Sampling in Software
When sampling at the maximum software rate, the signal itself may affect the software, resulting in inaccurate readings. Here is an example of how I debugged an issue and doubled the rate.
Yummy Candy Tin Robot
Yummy is a line-following robot made from an m&m's candy tin, in homage of Sweet. Yummy features a light sensor for detecting when the candy tin has been closed, to delay starting the motors as long as necessary. The rear tail lights use 10 mm red LEDs with Fresnel lenses.
Cleaning a Mouse Scroll Wheel
The scroll wheel on the Microsoft Wireless Mouse 5000 can stop working over time. As you'll see, the scroll wheel is a classic interrupter encoder wheel that can be fixed by cleaning. The difficult part was figuring out how to open this mouse, which ended up being held together with four T6 torx screws hiding underneath the glide strips.
Removing Solder from PCB Holes
Excess solder can clog circuit board holes due to overzealous soldering or when desoldering to remove a part. It can be annoying to try to get the solder out of the hole, but these methods and tools can help. Article also describes how to make your own Teflon desoldering tips.
Sturdy Attachment of a Lego Wheel to a Gearmotor
Nothing is more pathetic than a robot that has lost a wheel. Couplings based on the standard mating cross axle have a habit of sliding off. But, the peg holes present in larger wheels provide opportunities to securely attach the hub with screws. Using a lathe, milling machine, digital readout, magnets, PVC plastic, and a carefully-drafted layout can produce a rugged Lego coupler. Ah, an article on math and machining; what could be more universally appealing?
Replacement Battery Pack from AAA Cells
When a consumer device stops working because of a proprietary battery pack, you may be able to repair it by replacing the batteries with off-the-shelf rechargeables. If necessary, it is possible to solder together your own battery pack so long as you wear safety equipment, have a solder gun, and clean the terminals. Of course, this assumes you can find cells that match in size, voltage, and chemistry.
Afterthought Cake Robot
A pleasant robot that doesn’t do much consists of a collection of interesting parts assembled together because they didn’t fit any other robots. The robot is a successful experiment in making couplers shorter, employing escap rectangular motors, detecting distance moved with an interrupter infrared encoder, and a cube of multiple smaller PCBs. Powered by a single 180 mAh lithium polymer cell without a voltage regulator. Motors driven using low-voltage high-current Zetex bipolar transistors. Includes lots of big pictures and a descriptive demonstration movie.
Replacement for PNA4602M
The Panasonic PNA4602M 38-kHz infrared detector was a very popular electronic part for obstacle and wall detection. Unfortunately, the PNA4602M is discontinued and similar modules can’t handle continuous signals. Good news! The new Vishay TSOP4038 is an excellent substitute. Tests compare detection distance, false pulses, and detection time. Also included is the relevant source code to variable-frequency duty-cycle measurement.
Serial Communication
A very popular method of sending and receiving data between devices and computers is good old asynchronous serial communication. See traces of characters being transmitted. Learn how far timing can be off before introducing errors. Includes a table of popular crystal frequencies and baud rates, as well as machining information and a source code snippet for an automatic bps detection tool.
Digital Indicator
Reuse is a good thing. In this case, a unique surplus item that appears to be a digital caliper is actually a digital indicator based on the caliper body and circuitry. The data port pinouts, mounting screw sizes, and example output analysis are posted, along with a cheap way of powering the tool from a 'AA' cell.
Repairing a Model Rocket
A rocket found in a tree had loose and missing fins, a broken parachute, and a lifeless shock cord. Replacement fins can be made from balsa wood, using a pen and a hobby knife. After sanding, they can be reattached with two kinds of glue. Simple repairs and replacements make the rocket flight capable again. After all that work, an overzealous choice of a rocket motor sealed the rocket’s fate. Where do you think the rocket (and “Lego Major Tom”) ended up?
Machining Magnesium for Elemental Density Comparison
To demonstrate the massive difference in densities of naturally-occurring elemental metals, a large magnesium ingot is machined down to a precise cylinder using a hacksaw, milling machine, and lathe.
Long Exposure Photography
LEDs create beautiful and informative light trails when a robot is photographed in a dark place with the shutter open. This approach captures the exact movements and behavior in a single photo, as opposed to replaying a movie over and over. Use a tripod, remote control, and experiment with lighting conditions for best results.
Capacitor Leakage
When power is disconnected from a circuit, the capacitors on the board are discharged by the electronic components until no voltage remains. That’s fine. But, did you know that if you charge a capacitor on its own, it will slowly discharge through itself? More surprisingly, some capacitors become leakier with time, but can be healed through usage. I was shocked to discover how difficult self-discharge is to measure.
Industry-Standard LCD Modules
A blowout price on a 2x8 LCD module without specs leads to a bargain on industry-standard 14-pin alphanumeric LCDs. Demonstrates simple techniques for determining connector pins. Ultimately, the datasheet is found, and the contrast and backlighting pins are covered as well. Includes an example of writing custom bitmap characters.
Color Printed Circuit Boards
Green is so boring! Finally, your electronic devices can have beautiful red, black, and blue color circuit boards. The example shows an exposed-PCB Sandwich robot that starts with colored copper clad boards. The PCBs are etched at home with a peristaltic pump, after including an image of my dog and dealing with government-coded dots. The project is rounded out with a clear DIP socket and a shrouded battery cap.
Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919
Trimpots
A visual guide to breadboard-friendly trimpots (small variable resistors) that appear in nearly every hobbyist electronic project. The article features comparison pictures and part numbers of 3/8-inch and 1/4-inch square single-turn and multi-turn trimmers. Even more interesting is the cutaway close-up photographs of the inside gears and brushes of these tiny potentiometers.
Back-And-Forth Robot
A robot that drives forward to a wall and returns is a popular contest and student project. Surprisingly, this robot can be made with an off-the-shelf 8-pin motor chip, a couple of resistors, and a couple of chips. The article provides a complete walkthrough of the schematics, along with an animation of the changing states and a video.
Minifigure Multimeter
Have you ever had a pile of assorted resistors that you wish to quickly organize?
MUK LUKS D谩msk茅 boty Christy Fashion 艩ed谩 , Indigo Rd. Hn臎d媒 Ivanka Trump d谩msk谩 p艡eds谩dka kotn铆ku kotn铆ku 艩ed谩 WeiPoot d谩msk茅 m臎kk茅 materi谩ly s pevn媒mi uzav艡en媒mi botami s dvojit媒m prutkem 膶ern谩 Obnovit d谩msk茅 Wynne-06 svetr man啪etov茅 knofl铆kov茅 boty 膶ern谩 IDIFU D谩msk谩 m贸dn铆 platforma Mid Wedge Skryt茅 podpatky Mid Calf Jezdeck茅 boty Hn臎d媒 VogueZone009 D谩msk茅 kulat茅 zav艡en茅 拧pi膷ky N铆zkopodla啪n铆 n铆zk茅 podpatky Solid PU boty 膶ern谩 , FitFlop d谩msk茅 skatebootie semi拧ov茅 boty 膶ern谩 , 沤ensk谩 platforma NIQI Boty jsou krajky n铆zk茅 Heel Mid Calf Plus Velikost boty K暖啪e H艡ebenov茅 n媒ty Buckle Boots B茅啪ov媒 Style & Co. D谩msk茅 boty Ciley Suede Closed Toe Ka拧tan , VogueZone009 D谩msk媒 n铆zkoprofilov媒 pevn媒 zip uzav艡en媒 boty s kulat媒mi 拧pi膷kami na 拧pi膷ce Broskev , WeiPoot d谩msk茅 zip s kulat媒m uzav艡en媒m materi谩lem se 拧pi膷kou 拧pi膷ek PU Above-The-Knee Boots Blackpu Dr. Martens 沤ena 1460 Re-vymy拧len媒 viktori谩nsk媒 tisk Lace Up Boot N谩mo艡nictvo , VogueZone009 D谩msk茅 pevn茅 imitovan茅 semi拧ov茅 kotn铆kov茅 podpatky kulat茅 uzav艡en茅 拧pi膷ky 膷ipky boty B茅啪ov媒 , Dr. Martens 啪ensk谩 str谩nka Wc Boot Multi , FRYE D谩msk谩 kabelka 8R Boot Tan-77455 Pleaser d谩msk谩 obuv DEL1015 / BPU / M 膶ern谩 fauxov谩 k暖啪e / 膷ern谩 matn谩 , UGG d谩msk茅 Kelby Boot Tmav媒 ka拧tan WeiPoot d谩msk茅 zipov茅 kotn铆kov茅 paty Pu Solid Low Top Boots B茅啪ov媒 Kamik d谩msk茅 pun膷ochy Jenny Ankle Rain Sv臎tle 拧ed谩 KEEN D谩msk谩 hooda III Lace up-w Snow Boot 膶ern媒 / Magnet P谩nsk茅 boty aktivn铆 膶ern谩 , Ariat Women s Unbridged Adriana Z谩padn铆 boty Kovov媒 semi拧 Obnovit d谩msk茅 Wynne-06 svetr man啪etov茅 knofl铆kov茅 boty 膶ern谩 Dr. Martens Women 1460 W 膶ern谩 Qq Kv臎tiny , IDIFU d谩msk茅 m贸dn铆 拧pendl铆ky 拧pi膷at茅 拧pi膷at茅 boty st艡edn铆 bloky 膶ern谩 Belmont boty Eastland Women Hn臎d媒 Dev臎t sedm origin谩ln铆ch ko啪en媒ch d谩msk媒ch 拧pi膷at媒ch prst暖 s n铆zkou podpatkou Stiletto Heel Handmade Mid Calf Boot 膶erven茅 UGG d谩msk谩 klasick谩 mini vodot臎sn谩 sn铆hov谩 obuv Kov ,
Place each resistor in the hands of the electrified Lego minifigure to see and hear the nearest standard resistance. This practical meter includes both an ohmmeter for resistance measurement as well as a voltmeter for battery measurement.
Rockport p谩nsk谩 boty Toloni Coll Brown Kor谩lov茅 d谩msk茅 kostikov茅 vy拧铆v谩n铆 Knofl铆ky prst暖 G1388 Kost , CLIFFS BY WHITE MOUNTAIN D谩msk茅 boty Cliffs KARLINE P拧enice / Nat , Twisted X P谩nsk谩 ocelov谩 拧pi膷ka Cowboy Work Boot Hn臎d谩 obl谩zkov谩 / hn臎d谩 obl谩zkov谩 , IDIFU D谩msk茅 tepl茅 st艡edn铆 kl铆nov茅 podpatky Faux k暖啪e Tlust茅 p艡es koleno Vysok茅 sn臎hov茅 boty Dlouh茅 zimn铆 boty Modr媒 , Reebok p谩nsk茅 klopadlo CL Nylon SG Sl谩ma / k艡铆da Adidas Performance mu啪sk茅 Powerlift.3 k艡铆啪ov谩 trena啪茅ra Collegiate Royal / Tech Blue Ch Pevn茅 拧ed茅 , 5.11 Tactical A.T.A.C. 膶ern谩 , rismart D谩msk茅 tenisky Punk kolena vysok茅 kost媒my Lace Ups Canvas Boots 膶ern谩 , Latasa d谩msk茅 semi拧ov茅 platformy vysok茅 podpatky koleno boty tmav臎 啪lut谩 Brinley Co Womens Faux k暖啪e s mandlovou 拧pi膷kou Taupe Easy USA d谩msk谩 bavlna Mary Jane obuv Ballerina balet obuv boty Navy Velvet , Nike p谩nsk茅 Air Zoom Ultra Tenisov茅 boty B铆l谩 / 膶ern谩 / Univerzita 膶erven谩 YDN d谩msk茅 komfortn铆 ko钮谩tko s n铆zk媒m podpatkem Mu拧ky na bavln臎n茅 sand谩le s otev艡en媒mi 拧pi膷kami 膶ern谩 polka Dot-10cm Mavirs Loafers pro 啪eny, 啪eny Loafers Velvet Backless skluzu na lakov谩n铆 v媒拧ivky Mule Papu膷e Denim kv臎tiny nativn铆 p谩nsk茅 Cruz m贸dn铆 tenisky Kostn铆 b铆l谩 / b铆l谩 , Easy Street Women Becca Mule 膶ern谩 Vans Authentic 膶ern谩 / mraziv谩 拧ed谩 Sperry Top-Sider Firefish lodn铆 膷epice Tan Rainbow Sand谩ly Jig Foo Open-Toe Latina Salsa Tango tane膷n铆 boty pro 啪eny s 3 \ , Vans p谩nsk茅 sklopn茅 (Tm) Core Classics 膶ern谩 Propet Women Washable Walker tenisky Sr White LifeStride D谩msk茅 Viva Slip-On Loafer 膶ern谩 FitFlop D谩msk茅 F-Sporty Uberknit tenisky 膶ern谩 1 , D谩msk茅 膷epice EJ2 zna膷ky Capezio Jazz Slip-On Tane膷n铆 s谩l pro mu啪e Latina Salsa Sneaker Tane膷n铆 boty Suede SERO102BBXEB Pohodln茅 - Velmi jemn茅 (Bundle Z 5) 艩ed谩 , Vans Era 59 (2 t贸ny C & l) tmav臎 拧ed茅 / 拧ed茅 Vans Unisex Authentic Canvas Shoes 膶ern谩 / Guma Converse Chuck Taylor All Star sez贸nn铆 b铆l茅 burgundsk茅 Golden Fox Steel toe Work Boots P谩nsk茅 6 \ Hn臎d媒
Weatherproof Project Box
Modifying a Pelican micro-case for a dustproof, waterproof, and bugproof outdoor electronics container. Tips on punching a rubber liner and connecting external wires through a PVC pipe, or hacking a seal with poster tack.
Safe Sync for External Flash
Digital cameras have a relatively low voltage limit on their sync hot shoe, compared to mechanical cameras. This makes modern cameras susceptible to damage from higher-voltage external flash units, which consumers and hobbyists may attempt to reuse from previous generations. The circuit described in this article is a classic solid-state level-shifter often used to interface DC circuits to AC appliances.
Electrolysis Rust Removal
There’s nothing more depressing than to see corrosion on your precision tools or antique hardware, particularly if the rust is in a hard to reach area. Fortunately, there’s an electrical technique to reverse oxidation without harming steel or iron the way abrasives or harsh chemicals can.

Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919 - ganbaruzoi.club

Includes results of testing a graphite electrode for the anode.
How to Measure Low Resistances
Occasionally you'll run across electronics such as relays, cables, igniters, switches, or current-sense resistors that have resistances less than one ohm. Few multimeters accurately measure less than 1 Ω, but most have a millivolt mode that can be combined with a 5 V source, a fixed resistor, and some simple math to determine milliohm resistances.
PCB Layout Tricks and Tips
A few extra holes, wider pads, and copper fills can greatly increase the versatility, solderability, and ease of testing of the printed circuit boards you design.
Solar Recharging
A small solar panel or series of solar cells can power an electronic device during the day, as well as recharge NiMH batteries to power the device at night. This simple recharger uses diodes for reverse-power protection and so that the project can measure the power source voltages. Includes schematics and graphs. Obnovit d谩msk茅 Wynne-06 Wynne-06 man啪etov茅 svetr man啪etov茅 Op谩len铆 knofl铆kov茅 boty Op谩len铆 4634919
Multimeter Reviews
A digital meter is an essential tool for all robot builders and electronic hobbyists. If you’re just starting out, can you buy the least expensive model and still get accurate results? How much do you need to spend to get a decent mid-range model? A dozen multimeters are tested and compared.

Previous articles are moved into the categories below. To be automatically alerted to new articles when they are posted, subscribe to the Robot Room RSS feed.

All Articles
Robots
All robots
Line-Following Robots
Including maze solving
Mini-Sumo Robots
Plus ring making and rules
Solar Robots
膶epice a boty BEAM and microcontroller
Motors
Mounts, couplers, H-bridge, PWM
Machining
Milling, drilling, and lathe
PCBs and Breadboards
Solderless and printed circuits
Tachometers
Also counters and encoders
Electronic Projects
And various electronic parts
0
1
2
3
4
5
6
7
8
Sensors
Infrared, photo, and distance
Inside Toys
Reverse-engineering
Calculators
Ohm’s law and resistor bands
Miscellaneous
Multimeters and more
Obsolete
Scrapyard of old articles