Recent Posts

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Robot Videos / Robotics into your workplace
« Last post by correct1991 on Today at 05:16:06 AM »
Electronics / Good durable servo for product
« Last post by Kyle Berezin on June 23, 2016, 02:50:34 PM »
I am one of the founders of OpenMYR, a startup that will soon be delivering a Wifi stepper motor and WiFi hobby servo controller to Kickstarter. The issue I am having is choosing a good micro hobby servo to ship with the board. Originally I intended to use the cheap plastic tower pro servo motor, it only costs about $1.30ea in the quantity we were looking to buy. I didn't intend them to be long term motors, just something to use out of the box without inflating the cost of the whole product.

The issue is the test ones we bought were breaking left and right, I was able to snap a gear tooth off by simply telling the servo to push against a solid object. I upgraded to the metal geared MG90s ($1.90ea) and had better luck at first, however after a bit of use, 1 lost its axle-gear grip on an internal gear, one gets its position wrong if it gets warm, and 4 were fried on a 12 volt rail (not the motors fault). I had 8, 4 fried, and 2 failed. That is 50% failure. I'm worried if I ship with chintzy OEM motors our backers won't have faith in our product longevity even though we don't make the servos. What is a durable low cost motor? I don't need strength or accuracy or response, these are just so you have something that works out of the box. Or would you personally be ok with getting a cheap motor since it brings the cost down and you already intend on replacing it with your own. Remember, if you believe I should offer multiple options, the cost of all of them goes up due to the quantity being split across 2 products.

Opinions or options are both welcome.

Kyle Berezin
Mechanics and Construction / Max Weight Classes
« Last post by jcsymmes on June 23, 2016, 08:20:32 AM »
Working on a quick protoype of  a design idea.

Looking for an existing  prefably cheep robotic wheeled platorom that can move ideally 30 pounds on a flat surface. I could work to lower the payload a bit but ideally not. Any ideas of what would work well.

Was thinking of hacking a Hoverboard, but wondering if that maybe to complex from what i have seen online. If there is any of its competitors out there that can be easily arduinoed that would be useful .
Mechanics and Construction / not able to make my robot turn at times
« Last post by riki on June 21, 2016, 02:08:57 PM »
I have made a basic robot using 4 dc motors and three way switches. It performed fully when i tested at home. But at the time of the robowar it jst refused to turn. From then onwards it turns only at rare occassions. I cant figure out the problem. Please help
Software / Microcontroller Help
« Last post by pina_coleata on June 21, 2016, 09:57:42 AM »
A team and I are creating a robot. The robot will have two wheels, and use differential drive. I am looking to program the micro-controller myself. I understand how to program, but I don't know what micro-controller to use. Should I use an Arduino, an AMD, or something entirely different? This robot will be RC controlled.

Thank you in advance,
Mechanics and Construction / Base for Robot Arm
« Last post by nickwalt on June 20, 2016, 12:10:07 PM »
I'm making a robot arm (my first one) and I'm trying to figure how to actuate the base. The arm will have a rotatable base with a 20cm tall tower on it, but I'm worried if I simply attach the servo to the tower then the moment from the outstretched arm will be too much stress on it. What's a good solution for this? Do I just have two discs touching each other so they hold the force and have the servo actuate the upper one? Or will that cause too much friction?

Any resources or help would be great!
Electronics / Re: DTMF 8870 Circuit Explanation
« Last post by Victor on June 15, 2016, 01:50:00 AM »
Hi,And thanks for posting back what worked, insanity schedule pdf it'll presumably facilitate others having similar problems.
Electronics / Motherboard and a high end gpu on robot
« Last post by munim on June 14, 2016, 11:25:33 PM »
Is there possible a way to get power from 12v batteries to power gpus like Nvidia Quadro or other high end gpus for image processing?
Misc / Re: Rokenbok Toys Come to Life with Arduino Programming
« Last post by Rokenbok Education on June 06, 2016, 02:41:53 PM »
Here's how to build and program the Beetle Bot, one of the many robots you can make with the new Rokenbok programmable robotics set:

Again, here's the link to the Kickstarter campaign:
Misc / Rokenbok Toys Come to Life with Arduino Programming
« Last post by Rokenbok Education on June 01, 2016, 03:51:43 PM »
Hi all,

I thought you'd dig the news that Rokenbok is jumping into robots.  Check out our Kickstarter here:

We launched yesterday and have already raised over $13,000.  The set comes with step-by-step instructions to build and program a beetle bot, a scorpion hunter and an auto-ferris wheel.  But with over 400 building components, including sensors, motor modules, hinges, wheels and gears - and a brand new Arduino-based smart block - imagination is the only limit to what you and your kids can build.

After building your Rokenbok robot, you plug the brand new ROKduino smart block into a computer and start coding.  With our easy-to-follow instructions and drag-and-drop programming, kids as young as eight years old can enjoy the satisfaction of bringing their robots to life.  After mastering the basics, itís a snap to step into full Arduino programming.  We will supply code blocks that can be downloaded from our site.  And of course, you are free to use code from anywhere in the Arduino community.

The microcontroller in the ROKduino smart block is an ATmega32U4, which is the same chip used in the Arduino Leonardo.  Everything included in the robotics set, including the ROKduino, can snap into every building component Rokenbok has ever produced.  Plus, we will be providing downloadable CAD files for 3D printers, so you will be able to create your own custom components.

The Rokenbok Programmable Robotics Set will retail for $300, but if you act now, you can get it for the early bird special of $199.

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