Let's Make Robots!

Recently Collected Posts

Your basic "classic" Herbie the Photovore junkbot mouse-bot. Nothing too new on my version, except perhaps for the use of old bass guitar strings (two of them) and … Read more
Scripted driving for testing and finetuning motor control
Using a
This is my supposed entry for the 2010 DTU Robocup challenge. The body is made from LEGO Technic bricks from the Robotics Invention System (the old MINDSTORMS set) … Read more
Wifi controller, autonomus, gps, wifi camera, mp3 player
Using a
 UNDER COSTRUCTION  UNDER COSTRUCTION  UNDER COSTRUCTION   Hi everybody (first for all sorry for my bad english), This is my first robot. This is an autonomus … Read more
Nice litle set of belt-tracks. Kinda cute! http://www.solarbotics.com/products/gmtpkg/ Price is for a pair! You will need to sort out how to mount the 2 axels … Read more
Hi LMR...          I think that you often run into the problem with MCU that when you press a button it read it not only one time but often even 50 times or … Read more

Help with 555 circuit.

Well, I have got the 38khz distance sensor working in picaxe form.

Here

Here

Now I am trying to wire-up a stand-alone unit with a 556. Now I know this is a RTF(data sheet) moment and I know the resistor/resistor*cap/2 (or whatever) equation, but the final circuit is still above my head. Are there any of you circuit guys out there that can do a little drawing for me? Maybe with a couple pots for fine adjustment? I plan on the final output going into a picaxe using the pulse-in command.

Thanks in advance.

In 2008 I have built a simple balancing robot, mostly a copy from a balancing robot made using a Basic Stamp 2 SX, found on the Parallax Forum, that I have adapted … Read more
It uses aggressive and angry behavior to push opponents or obstacles out of its ring
Using a
Here is the Micro-Sumo bot that I designed and built. I finished my Mini-Sumo and started looking at the next smaller size. A robot 50mm square looked like … Read more
I made Miss Princess for my 4 year old niece. She's a lot more interested in Princesses than robots, so I called it Miss Princess to trick her :) There's a Battery … Read more
Rolls around, finds a hole, gets stuck, falls apart
Using a
Rah!! at last my "start here" bot is built. Being a rank amateur struggled a fair bit with coding for the SRF05 and eventually nicked some posted code. Have … Read more
Navigates via ultrasound
Using a
Hi all, new to the group. Here's my first robot project ever - "SprintBot"  I do laser engraving and cutting as a business, so the chassis of the bot was fairly … Read more
  Well, here's a fun one I built out of a bunch of parts stolen from one of my first bots: http://letsmakerobots.com/node/589   Read more
I bought some small tilt-sensors. basicly they where a small metal capsule with a ball inside. When tilted, the contact was switched on/off. I thought this was … Read more
Well folks, Here is some of the first tests of Walter's mapping system. There are 2 videos, one showing a mapping run and the data, the other showing the hardware I … Read more
Is it wrong to give your robot a little head? Or a big head for that matter? Gone are the days of my old, clunky teaching pendant for Walter's head. I have coded a … Read more
This is my fully functional scratch built R2-D2 with spinning dome and openning panels including accuating arms
…a long time ago…about 25 years ago actually I made a lifesize rc R2 out of cardboard, sweat and a lot of tape. It made it through one sf convention before I … Read more
hello all,i am new to bots making.this one is the first. part list: 2*28RPM gear motor, 2*bike spoke as leg, a piece of sheet iron as body to fix the … Read more
this is my first try to use hobby serveos.it is a very simple test. I am going to add a pair of ir senser on the m8's adc port to control the bot turn,maybe rc … Read more
Hi guys! Goggling around searching for information on arduinos and robots, I found this fantastic website. After spending hours reading your projects I decided to … Read more
Makes people aware of air quality
Using a
The first idea (as below) was to make a little solarpowered robot. This is still the case but it won't run on tracks but it will fly in the sky hanging under a … Read more
Navigates around avoiding obstacle or bluetooth controlled.
Using a
Hi LMRs again            I've started designing a new robot which will be semi-autonomous. I got a set of Tamiya 70100 tank treads. Quality is good for … Read more
Price: $2.95 USD

 Collected by one member
The SGS Thompson L298 motor driver chip is a brute of a motor driver, designed for up driving 4 amperes at 46 volts. Read more
TTL serial converter cable which will allow for a simple way to connect serial TTL level devices to USB. No MAX232 or other level converters needed. It works very … Read more
These brilliant blue LEDS are a great addition to any robotics or electronics project. Read more
Price: $10.95 USD

 Collected by one member
The VNH2SP30 is an improved version of the VNH3SP30 motor driver, featuring current sensing, increased drive capability, and a higher maximum PWM frequency of 20 … Read more
Price: $10.95 USD

 Collected by one member
The VNH3SP30 is a great H-bridge motor driver for motors running from 6-16 V and drawing up to about 15 A. The chip is able to withstand 40-V transients, … Read more
Price: $10.95 USD

 Collected by one member
These premium jumper wires are stranded 26 awg wires with female terminations on both ends, for use with 0.1" (2.54 mm) male headers. The assortment of … Read more
Price: $49.95 USD

 Collected by one member
The jrk 21v3 motor controller is a highly configurable brushed DC motor controller that supports four interface modes: USB, logic-level serial, analog voltage, and … Read more

Starting with .NET Micro Framework

My current project is a start here robot with .NET Micro Framework using a FEZ Domino board from GHI Electronics. The FEZ Domino is pin compatible to Arduino, but has more processing power (ARM7 core with 72MHz clock), 3 UART, 2SPI USB host and micro SD-Card support.

After building some Arduino based robots I think it's time for a change. Before I start build the robot itself some testings were needed to find out if the FEZ Domino is a worthy successor for the Arduino and can I use my existing Arduino shields.