Let's Make Robots!

 

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FPGA

It's come to my attention that much of a robot's sensor processing would be better off done with an FPGA (field programmable gate array)

Such things as sound localization, or a FFT can be done directly in an FPGA, and not need to eat up the processing power of a Pi or Arduino. In fact would be much faster and could be done in real time.

I've posted a link to the Snicker Doodle earlier and here is a stand alone that would *not* have the same internal bus speed advantages:

Arduino + ESP8266 Wifi Self balancing robot

Hi, I just found (and bought) a cool robot that uses the Arduino Leonardo+ ESP8266 Wifi module to communicate with a smartphone/tablet/Ipad: 

Best Microcontroller for med sized robots?

Hi again all! It's been a bit, how are you?

Noob here trying to build a Robot with my 4yo

Hello everyone.  I hope my first post gets some amazing replies and input to guide me in the right direction. 

My family and I were at Barnes and Noble this weekend just browsing around for magazines. But then I casually started making my way torwards the robot books and my heart started racing.  I was soooo excited to read about how to build robots that I could not fall asleep that night. :)  I picked up Making Simple Robots by Kathy Ceceri and looked through it for hours the day I bought it.  The only thing that was missing was the electronics kit. :(

Snickerdoodle Microcontroller/Microprocessor

Just ran across this:

https://www.extremetech.com/computing/216866-know-what-a-fpga-is-then-the-snickerdoodle-is-for-you-and-better-than-the-raspberry-pi

Looks like a lot for the $55. I know nothing other than that.

Could not figure out how to post that as a link...

Attaching wheels to servos

I have got hold of a couple of these...

http://www.robotshop.com/uk/parallax-futaba-continuous-rotation-servo.html?gclid=CMSn9fuQyscCFSsEwwodRLEBEw

 

but want some advice on how I attach wheels to them as the holes on the servo spindles(?) are about 2-3mm wide. Can you buy screws that small?

 

This is my first ever build so I am completely new to all of this.

 

 

Arduino crawler robot

My arduino robot project:

Arduino Nano V3.0 5V ATmega328P 

3x battery li-on 18650 

unapplied Battery Power Level Indicator 3-30V

DC-DC Boost Converter adjustable 10-32V 12-35V  - 10A 

DC-DC Converter 5v power supply Arduino and sensor

MOTOR controller L298N Dual H Bridge 

algorithm for autonomous robot/car

Hi, has anyone some experience with autonomous car? I want make some program for my autonomous car with some sonars - HC-SR04. 

If anyone can help me I will be so happy :) thanks

Trouble with servos!

I’m working on a robot that’s supposed to place dominoes in a track. As part of the design, there’s an arm that grabs and places the dominoes.

robot that follows me

hi guys so my question is how can i build a robot that can follow me using my phone or anything else


USB Lipo Chargers

A long time ago, I purchased a really cheap Lipo charger that can be powered through a USB. It works great with the 3.7V RC heli batteries I have, and I'm now considering building something out of it.

Here's my intentions: power a microcontroller using the lipo, when that lipo is also connected the the chargin circuit. And my question is is this something I can do without frying the circuit? I'm still a bit shaky in electronics, so I thought I'd come here to see if anyone had answers.

Here's the picture and schematics:

Help on this motor

I have a motor taken from a printer( had two, killed one to try figuring it out) with three wires, a gear reducing portion and no clue as to how it operates. I've applied voltage to the red and black and nothing happened, so I took it apart to find a small board and ic. Any help would be super appreciated.

Suggestions for Wireless Serial Connection between PC and Arduino

All, 

I want to have a PC running Linux (going from its USB port) that can remotely program, get data from the serial port on an Arduino Uno.  

2d cad recomendation or help on linux?

Dear: LMR

Hello guys it is me Noah. Today I began to play with librecad on my ubuntu computer and I am really struggling with it. I downloaded another cad call QCad and it is far harder. Please guys this is coming from a guy who loves 3d modeling and never has used 2d before; So can you either help me get started with librecad like maybe a book recomendation or online tutorials, or recomend a new more user friendly software that is only for linux. TJust to let you know I am not willing to purchase any software. It all has to be free and no charge. Thank you.

From: Noah

Continuous running robot (while charging)

Hi,

I know this topic has already been addressed, yet I could not find a complete answer.

Untill now, I have always built robots that needed to be turned on when I wanted to use them. So the charging has never really been an issue.

Now I'm thinking of a "sentinel robot" which would always be turned on so I can take control anytime without being on site.

So the idea is to have a base where the robot sits most of the time, his batteries get always charged. At anytime, it can leave its base, make a little walk and return to its base to recharge its batteries.

create horse racing betting game

Hello, i am totally new and looking for help for a project i have.

 

Basically i would like to have 5 robots going from a point A to a point B, starting at the same time but, according to a random speed, finishing in a different order every time, to simulate a race between each robots and determine a winner.

Here is a great example of what i want to accomplish :

How store data in eeprom !

Hi guys!
Im a beginer in arduino and Im really bat at coding. Can everyone guild me how to record the position of Servo in EEPROm by clicking the button and want the servo plays back after pressing the button 2 times 
Can every help me 

LIDAR Product Review

I was fortune to be selected by RobotShop to review the PulsedLight LIDAR Time-Of-Flight distance measuring module.

It arrived in very reasonable time. Nice shipping box with sufficient paper packing to insulate the device from damage during shipping. Device itself was contained in a plastic package with associated 6 wire connection cable. One end of the cable contained a 6-pin JST header for insertion into the module. The other end of the cable wires were bare tinned wire.

Note: The +5V wire is red. All others are black.

Where to put stronger servos on humanoid?

I have servos (17  of them ), making the Sainsmart 17 DOF robot, and I have 2 more very strong servos.
I am wondering which joints will need stronger servos, ankles, hips?

Get problem when control servo RC by potentiometer

Hey guys!
Im working a robot arm control by potentiometers
I write the code in arduino like that : myservo.write(map(value,0,1023,0,180)); When the potentiometer at 0 position( analog=0), the servo vibrates. After i rotate potentiometer until the value= 80, the servo is stop vibrating and moving 
Can you give me some suggestion to solve the problem  

Sincerely thanks!