New products: Optical encoders for micro metal gearmotors

Posted by Ben on 13 September 2013
Tags: new products

Those encoders we mentioned last week are finally here! Here are some pictures:

Check out the product page for more details.


One thing, me and more people, are waiting for long is an extended shaft version of 1:5 HP micromotor. Why you do not have it already?

We are definitely planning on expanding our selection of motors with backshafts now that we have encoders for them. Generally speaking, the 5:1 gear ratios have not been very popular, so I'd be interested to hear more about what you want to do with them.

Would this encoder work on a 3Pi or a Zumo? Encoders are one thing that both of these platforms are lacking. Anyway, this looks like a great solution for other small robots.


Hi, Ted.

There are two aspects to this: physically getting the encoders in there and doing something with the signals.

I'll deal with the computational part first since that applies to any platform. At the top end of the performance, the motors and encoders give you about 10,000 counts per second, and with two motors, that's 20 events per millisecond. So, you would likely need something much more powerful than an ATmega328 type of processor to deal with that and still do something interesting, like maybe some trigonometry.

On the 3pi, the encoders could fit in the original motor postions but they would partially block the expansion port, and getting the motor leads connected to the existing motor connection points would be tricky. You can get around that by going to the extended brackets, which would let the encoders fit without blocking anything but would also make your wheels stick out more.

The encoders fit in the Zumo chassis, though you will have to figure out how to get the wires from there to your own electronics (our existing Arduino shield does not support the encoders, so it's not a useful starting point even if you had something more powerful than a regular Arduino to plug into it).

- Jan
Hello, My optical sensor on the encoders was broken uncareful, I want to fix it myself. Can u tell my how to find the sensors?
Hi, Yang.

You can find the datasheet for the sensor used in our optical encoder kits under the "Resources" tab of either of their product pages. For example:

How did your sensor break?


Post a comment

Using your Pololu account allows you to customize your avatar and manage your comments; you can also post anonymously.

New Products

Free Circuit Cellar magazine April 2022
Motoron M2H18v18 Dual High-Power Motor Controller Kit for Raspberry Pi
15V Step-Up Voltage Regulator U3V16F15
DRV8434S SPI Stepper Motor Driver Carrier, Potentiometer for Max. Current Limit
Motoron M2S18v18 Dual High-Power Motor Controller Shield Kit for Arduino
Free Circuit Cellar magazine February 2022
Motoron M2H18v20 Dual High-Power Motor Controller for Raspberry Pi (No Connectors or Standoffs)
Free Circuit Cellar magazine May 2022
Motoron M2S18v18 Dual High-Power Motor Controller Shield for Arduino (Connectors Soldered)
DRV8876 Single Brushed DC Motor Driver Carrier
Log In
Pololu Robotics & Electronics
Shopping cart
(702) 262-6648
Same-day shipping, worldwide
Shop Blog Forum Support
My account Comments or questions? About Pololu Contact Ordering information Distributors