Let's Make Robots!

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DIY LED Sign with MAX7219 Dot Matrix Module STM8S003F3 MCU for AVR PIC MSP430 Arduino ARM STM32

To satisfy electronic DIY hobbyists, ICStation has developed MAX7219 Dot Matrix Module. It uses the Max7219 chip which do a great job on saving of MCU I/O. It can not only control each point individually, but also can be extended without limitation to meet your requirements on LED Sign, Team Logo and so on.

Congress Talks about "Trash Robotic Router Platform". My personal project.

I wolud like to share with you, two talks that I have made this year in two national security congresses.

In both talks I present a Router based ROV [Texas Ranger] and a Fonera quadcopter [Atropos] both presented in LMR already:

http://letsmakerobots.com/node/23417

http://letsmakerobots.com/node/28143

The aim of "Trash Robotic Router Platform" is pretty the same of many members of this site. Use all you can get lying around in your home!

 

 

Learning to Program PICs in C (which compiler to learn with)

Hello LMR,

I'm a newbie here and I was hoping to draw upon the collective wisdom of your members. first of all let me say in no uncertain terms that I do not fancy myself a programmer. I have tinkered around with PIC microcontrollers for a few year using assembler (MPASM) and a little basic (PIC Basic Pro). I can usually muttle through making a simple project with these tools. But now I find myself deployed with a lot of time on my hands and I want to put it to use learning to program in C.

Now available from PicoKit!http://www.picokit.com - A cheap and simple 3 servo robot walker that anyone can make for under $40. My students in Industrial … Read more

Wireless/Zigbee for PIC Micros

Back in 2009, my professional work involved leading the firmware project of a low power wireless network of sensors collecting temperature and humidity data. Wireless gateways accumulated the information and sent to a data center over the internet. During that project, I fancied my own Zigbee network for my robots and setting up a network of home monitoring sensors. I eventually bought some Microchip MRF24J40MA modules (which is a completely different platform than my professional work).

PICAXE INFRA-RED REMOTE CONTROL

So i did everything as on this guide

http://www.picaxe.com/docs/axe040.pdf

But it's not working, I think the code is wrong? Can you help me ^^

I use picaxe 28x1

Thank you <3

Assembly PIC problems

Hi.

For a collage project, I have to do some PIC programming in Assembly. I've made a start, but I'm having trouble defining some variables. Out of the 11 variables I'm using, it is only naming the middle 5 when I simulate it. They're all pretty much identical appart from the name and the position in the memory. Does anyone have any suggestions as to why this is happening?

Sorry for the lack of info. my code's at collage, and I'm not sure of the software (I think it's VPIC, or something similar).

Thanks in advance

Spot X is my latest robot, but the first I've submitted here. The X stands for 10, because he's the 10th in a series of little robots I've built under the 'Spot' … Read more
Navigate around via IR proximity sensors
Using a
This is the second version of B.bro. I changed from the boost regulator to a linear regulator for the power supply, and changed the dual H-bridge to a chip that's … Read more
Draws interesting patterns using light sensitive behavior.
Using a
This robot is named for the main character in the song "Baby Brother" by the White Stripes, although I have yet to get it to crawl on the ceiling, swim underwater, … Read more

PIC 16F876A - Self balancing robot

Hi everyone,

I'm using a PIC16F876A to do a self balancing robot. But I'm having a problem and I don't know more what I can do to solve this.

In addition to PIC I'm using one accelerometer and one gyroscope supplied by sparkfun in IMU combo board: 

http://www.sparkfun.com/products/9250

To simplify the accelerometer(ADXL320) when perpendicular to the earth surface will output 2.5V. For every gravity acceleration it's possible to see 312mV change on the 2.5V

[ SOLVED ] Crystal oscillator for PIC

Hello folks, I'm having lot of problems with a PIC16F876A.

When I powered my newly built robot for the first time, the first thing I checked with my oscilloscope was the clock source, and found out that the crystal was not oscillating. Then I put my pic on the breadboard and started testing.

First foray into homemade PCBs

**Update at the bottom.

  Alright guys/gals, it has been a coons age since I posted anything even remotely useful of my own. I have managed to break that trend with this 'bitty blog, somewhat. I say somewhat, because, everyone and their brother has posted a how to about DIY PCBs. I will attempt to offer some bit of information that others have not, doubtful. :)

This is Tilter, my rideable self balancing robot. I've been working on this here and there for a good few months now, with a total ban on other personal projects, … Read more
my 1st "servo" walker, my other walkers where BEAM based :) Basically just a hardware upgrade, did not like my 1st build, some hardware issues etc etc.. some parts … Read more
Primarily a Development Platform
Using a
Videos posted of sandy in operation. (3-1-2012)   This is my first attempt at robotics and the first time here at LMR so apologies if all this is obvious to … Read more

Servo Controller: A thought experiment

First up, this is at best a work in progress, at worst only ramblings.

I have seen members asking about driving more than a handful of servos and getting the response that they can either use an arduino and its assorted libraries to drive 12+ servos, correction, up to 20 servos or get a dedicated controller board that seems to cost in the area of 50USD. I spent an hour or so knocking up an idea. I want to lay out my thoughts and see where it could or should go.

 

Flies scaring everybody that is too near...
Using a
Aimed by fritsl last post :)   ... Atropos is a wifi operated quadrocopter system. It uses a Fonera 2201 with a custom compiled version of GNU/Linux … Read more

Where to begin with PIC chips?

Okay, so I've gone out & bought my Arduino clone, had fun* with it, bought a truckload of ATMEGA 48-328's & had fun* with them and would like to now broaden my horizons a little. I'd like to see what's on the other side of the fence & give PIC chips a try. From what I can see, both have their advantages/disadvantages & can excel in some areas where the other may flounder.

do you think this would work if i wired it up to a picaxe 14M

ok this is a circuit i have come up with to try and not use a motor driver for my picaxe,

i will have the base transistors connected to pins of a picaxe 

i will appreciate your input 

Hobbybotics Reflow Controller

7 April 2011:

Wow, it has been ages since I actually posted something although I visit the site pretty much every day.  I ain't (good slang term) making no excuses but, okay, I am making some excuses as I am in the military and I do work roughy 11 hours, 5 days a week (when I'm not traveling).

Help need with IR detection and irin

Hi,

New to this malarkey so please excuse the ingorance.

 

I built the "Start Here" robot by fritsl. Works fine no problems - great introduction. Moved on to a BEAM mini sumo from Junkbots and got someone at work to explaine why it worked...

So, I have tried to expand and experiment with the pic based bot. I have added LEDs and light sensitive direction. Works OK

My problem is with the IR detection using a PNA4602 and irin.

I replaced the sharp GP2D12 with the PNA4602. From the left with the bubble facing;

Navigate around via sharp IR
Using a
I got the parts yesterday and i done building it already :) Read more
Explores via Ultrasound, plays "Zelda's Lullaby" when stuck
Using a
    This is my first robot.  I started fiddling with microchips as a break from high level programming.  I like feeling more in touch with the low level … Read more
Navigate around while avoiding obstacles with ultrasound, infrared light and air pressure based bumper sensors.
Using a