Let's Make Robots!

Need help controlling Traxxas ESC and Servo with Arduino

I'm working on an autonomous ground vehicle, guided by a U-BLOX Neo 6m GPS Module, and HMC5883l compass.

The ESC connects to the 7.2 NiMH Battery pack and is supposed to be connected to a RC receiver with a standard 3 wire servo cable, it also provides 6 volt regulated power from the same cable. Because the power is too high for an Arduino, I used a separate 5 volt power supply for the rest of the electronics, except the steering servo. Using a separate power supply makes the ESC and servo uncontrollable, creating a lot of jitter.

Robot Rookie

I am new to everything about this site, pure ambition brought me here. Without trying to sound like a cliche its been a dream of mine to create a functioning robot. I have no prior experience in this field, I do think with practice I'll be able to build the skeletal structure but its the coding that worries me, if any one has any re-assuring advice or steps to take to help me work this out, i would be very apprieciative. As i am very new i will start at the very begining. I plan to make the 'Start here' robot then on to the robot arm.


Thank you for reading

My First Bot - SUMBA

Hi everyone, im new to robot building and this will be my first robot, i do not have any materials for it yet i only have the completed code and a deadline of 4 weeks because of it being a school project aswell as a new hobby.

 

ATtiny servo control

 

After a brief discussion with fellow LMR member Maxhirez, about his Hedwig robot,
it seems as though there isn't much support for servos in the ATtiny family of
microcontrollers. After fighting with the 8-bit servo library I found HERE that was
supposed to make it as easy as a standard Arduino to add servos to an ATTiny project,

HMOD-1 Update 3

HMOD-1 Update 1

HMOD-1 Update 2

HMOD-1 upper body under construction:

 

PortmannFilter, a way to smooth your RSSI Signal.

Hello,

I would like to present you my self-made filter. It's called PortmannFilter. It can be used to smooth your RSSI data of an RF-Link reciever. Feel free to ask me questions and use it. But please declare in your project the usage of my filter. 

The Arduino measures an analog signal from the RSSI pin of the reciever. Then it does the same again. Afterwards the PortmannFilter compares the two values and smoothes them and too low values are getting ignored. 

Greets the_droid

 

Towards a Robot Kit for Maker Faire

I'm trying to come up with a kit to build at Maker Faire NYC this year. Chris the Carpenter and I ran a series of four workshops last year, that were in high demand. The challenge is developing an inexpensive yet awesome kit that can be made in an hour by just about anyone.

After my experience teaching 9 to 10 year old kids robots with the Rocket Brand Studios Tadpole kit, I'm looking for something that is simple, simple, simple. Still, I'd like to top what we did last year.

 

HMOD-1 Update 2

HMOD-1 Update 1

Some further work done...

Changed geared motors of the Makeblock platform (from 6 V, gear ratio 1:75 to 12 V, gear ratio 1:184):

 

CNC machined nylon deck:

 

Platform with nylon deck, Arduino Mega, motor controller and Li-Po battery:

King of Nerds -and- God of Nerds

I am sorry if this is old news to you, but I only just now saw these fantastic images because I'm poking around over on our G+ pages. May I present you .. King, and God of Nerds: Andrew "Ignoblegnome" and Chris the Carpenter :D

 

 

That is awesomeness!

From this article:

Famous robots

How many can you name? kFMPkyN.jpg (I don't have an answer key and I wish I knew who the original artist was to give credit.)

Peter (RobotFreak) found the artist's name. It is Daniel Nyari.

Coolest thing about my job!

When I got my job designing new products for DAGU everyone told me how lucky I was. As with any job, some parts are better than others. As I write this blog I am currently writting an instruction manual for a new version of the Playful Puppy robot kit using the Mini Driver robot controller. This is one of my least favorite parts of the job. I also had to help with the artwork for the box, another part I do not like so much :(

So now you must wonder, what is so cool that I would write this blog?????

What is the problem?

So my robot does work when it is connected to us or usb and 9V, but when it is connected only to the 9V
Everything works with little pulses and long delays!
Is this a good code even?

 

#include <Servo.h>

 

Servo servo; //Create a servo object

 

//Standard PWM DC control

int E1 = 5;     //M1 Speed Control

int E2 = 6;     //M2 Speed Control

int M1 = 4;    //M1 Direction Control

int M2 = 7;    //M2 Direction Control

 

The Doctor's Robotic Assistant!--THE MEDIBOT!

Hello, LMR!

 

I've been thinking about my research project for this summer for the Authentic Science Research course that I participate in, and I've had some ideas for what I might be accomplishing.  **NOTE**--this is currently just an idea, so nothing on this is final yet.  When it is, you will know.

RFBees and AVR Watchdog Timers...bark!

In my last post I mentioned using RFBees for a communications link between a remote sensor and a laptop PC. During my testing, the RFBees would become unresponsive at random intervals for some reason.

Wireless winter weather wonders - weather prediction with a swarm of *Bees

Here's a little project I've put together using a bunch of components from Seeed Studio:

Wireless Sensor Node

HMOD-1 Update 1

I am working since a while on a new humanoid to continue my AI experiments. So far I have finished a conceptual 3-D-drawing, based on the parts I want to use. The 2WD base is from Makeblock, the upper body the Johnny 5 torso from Lynxmotion. I have cancled the base rotate turntable and changed the original 1 DOF head with ultrasonic sensor to a 2 DOF head with compound eye.

Hacker and Lovers

Ok, there is not much new from my side in terms of robots but I did another photo shooting. Today, of course, with the topic "Valentines Day" (I hope you guys did not forget this)

Here is the first picture related to hackers (my special greetings to MarkusB :-) )

And the one for the Valentines Day comes now:

How-to for Thomas

First, lets state our goal:
We want a robot to drive to dark areas while avoiding stuff on the way using various sensors.

As with everything, we break it down into smaller pieces. We test each one individually, record any numbers we get (ADC readings and the like) and then start putting them together. While doing each of these tests individually, it helps us figure out how we are eventually going to put them together.

If someone told me to accomplish the goal above, I would do it just like this: