SKU: 16046021535
gear motor with encoder

gear motor with encoder N20 DC Motor with Magnetic Encoder - 6V with 1:100 Gear Ratio

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Description

gear motor with encoder N20 DC Motor with Magnetic Encoder - 6V with 1:100 Gear RatioThe first step in a robotics project is to get a motor spinning. Once you've done that you quickly learn that not all motors go the same speed, even if they are the same part number! There are always variations that relate to voltage, environment, and manufacturing changes. So, the second step is to figure out how fast it's going! Turns out that's not so easy, but the best way to get started is to add an encoder wheel and an optical or magnetic

The first step in a robotics project is to get a motor spinning. Once you've done that you quickly learn that not all motors go the same speed, even if they are the same part number! There are always variations that relate to voltage, environment, and manufacturing changes. So, the second step is to figure out how fast it's going! Turns out that's not so easy, but the best way to get started is to add an encoder wheel and an optical or magnetic counter. As the motor turns, the attached encoder wheel spins, causing the counter to detect each passing spoke and that lets your microcontroller count and determine speed.

If you want to do one better, add a second counter, and now you can tell direction as well as speed! All this wiring is kind of a pain, so that's why this motor is really nice! It has a magnetic wheel and two hall effect sensors already attached. Using this motor is a breeze, and it's a nice small motor as well, in the 'standard' N20 size.

Provide 4.5 to 6V DC (nominal) to the white and red wires - these connect to your motor driver, and can be PWM'd for speed adjustment and direction by using an H-bridge.

Connect the black wire to your microcontroller ground pin, and the blue wire to 3-5V DC (we tried both, works fine) use whichever voltage your microcontroller uses. Then you can read the hall effect outputs on the yellow and green wires. We have an example sketch here for Arduino, it can be adapted to other languages - basically you just want to interrupt on one of the encoder pins, use count the time since the last interrupt, and multiply the count time by 14-counts-per-revolution and the gear ratio.

This particular DC motor comes with 1:100 gear ratio, uses 6V nominal power for the motor and draws about 100mA (200mA when stalled). The gear ratio will not affect the current draw but does change the torque and RPM. See below for the no load/rated/stall current, RPM and torque for a range of ratios!

Technical Details

  • Dimensions (excluding shaft): 30.5mm x 18.5mm
  • Wire Length: ~150mm long

Ratio Comparison Table:

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SKU: 16046021535

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artistgirl
Port Orchard, US
★★★★★ 5
Dog love them
Great dog are kept busy
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Reviewed in the United States on June 18, 2023
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Timothy G
Dallas, US
★★★★★ 5
Chew incessant dogs
Color: 1PC-Beef-Red
Very tough, My Dashound is a Tasmanian Devil & young this has really slowed his roll, and still enjoying the chewing & licking with peanut butter. Great item!
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Reviewed in the United States on June 1, 2026
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Matthew Nichter
Louisville, US
★★★★★ 5
Durable!
Color: 1PC-Beef-Red
Alright, here's a product review for those Tough Dog Toys: Finally, a Toy That Survives My Monster! - Tough Dog Toys Review As the owner of a determined (and I mean determined) large breed chewer, finding toys that last longer than five minutes has been a constant and often frustrating quest. I've gone through countless plush toys ripped to shreds, rubber toys with chunks missing, and even some "indestructible" toys that met their demise far too quickly. That's why I was both hopeful and skeptical when I came across the Tough Dog Toys, designed specifically for aggressive chewers and large breeds. Let me tell you, these bone-shaped nylon toys are living up to their name. My power-chewing Labrador has been going at this thing for days now, and I'm genuinely impressed. Where other toys have succumbed to his relentless gnawing, the Tough Dog Toy has held its own. There are some minor teeth marks, as expected, but absolutely no significant damage, no pieces torn off, and no signs of imminent destruction. "Almost indestructible" might actually be an understatement! The design is simple but effective. The solid nylon construction feels incredibly durable, and the bone shape is easy for my dog to grip and maneuver. It's also a good size for a large breed – substantial enough that he can really get a good chew going without it disappearing in his mouth. What I appreciate most is the peace of mind this toy provides. I no longer have to constantly supervise playtime, fearing that he'll ingest pieces of a destroyed toy. This feels like a safe and long-lasting option for even the most enthusiastic chewers. Pros: * Truly durable – stands up to aggressive chewing from a large breed. * Solid nylon construction feels virtually indestructible. * Safe design with no small parts to break off. * Good size and shape for large dogs to grip and enjoy. * Provides long-lasting entertainment. Cons: * May show some teeth marks over time (though this hasn't compromised its integrity). * It's a fairly hard material, so dogs who prefer softer toys might not be as interested. Overall: If you're at your wit's end trying to find a toy that can withstand your aggressive chewing large breed dog, I highly recommend giving the Tough Dog Toys a try. This bone toy has proven to be the most durable option we've encountered, offering excellent value for money and, most importantly, a safe and engaging chewing experience for your furry friend. Five out of five paws!
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Reviewed in the United States on April 23, 2025
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Elizabeth
Whiting, US
★★★★★ 5
it was a bit too hard/small for my Great Pyrenees, so it didn’t work out for my dog specifically
Color: 1PC-Beef-Red
is good quality and feels very durable and well made. The material is strong and holds up well against chewing, especially for aggressive chewers. It’s also a nice design and seems safe for dogs to use.
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Reviewed in the United States on May 3, 2026
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Debra Supeck
Boise, US
★★★★★ 4
Indestructible dog toy
Color: 1PC-Beef-Red, Color: 1PC-Beef-Red
I have an 85 lb Pitbull and he loves to chew on those kind of hard bones but the meat flavor and scent is only in the middle the knobs on the end are just plain nylon and yes it is taking him a long time to get through them but little white fibers keep coming off I find them on the couch and he nibbles and tries to eat it so I believe he's eating the nylon and still has yet to get to where the beef flavor is in the center he doesn't chew from the middle he goes from the end all of his other chew toys he has he has demolished this one not so much I only gave four stars because my dog doesn't like it so much it is a very good sturdy toy though and has a good beefy smell. And a fair price.
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Reviewed in the United States on April 11, 2026

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