Let's Make Robots!


Navigate around via ultrasound, uses 4 legs to walk
Using a
My first robot was an autonomous rover based on the "Start Here" robot. So this time I wanted to go one step further and make something different, write my own code … Read more
I just noticed that a servo and a SRF05 range finder's trigger might be able to share an output pin on Picaxe 28x1 (should work on other models too). It should be … Read more

Servo control in Java

Hello everyone. I am making my first robot, and it's going to be a hexapod.

I have trouble with finances so I don't have most of the parts yet, and I have to make things work with parts I have before I can get more money from my club for other stuff I need.

I have 3 CARSON CS-3 502015 servo motors and Intellibrain board (I've got it for robotics competition). I program it in Java becouse it doesn't support anything else, and compiler I use is RoboJDE.

Recommendations for steering

I'm building a yard bot. The initial blog is posted for my Yard Gnome already.

This robot will steer like a car, with one drive motor pushing two rear wheels, and a two-wheeled steering mechanism up front.

I'm looking for recommendation for how to automate steering on this thing.

Is there an affordable servo that is strong enough?

Should I build my own servo?

Navigates around via ultrasound, turns on the lights when it gets darker, looks just awful and feels raped.
Using a
First of all, hello LMR! I'm new here so very impatient to learn everything and meet everybody. I saw this website few months ago and instantly fell in love with … Read more

Yet another PWM Picaxe question

I am programming my Mr Basic with Mr Basic moron driver. I use a Picaxe 28x1. It is a very basic setup indeed, with a small servo carrying a sharp IR distance sensor.

After reading many pages of manuals and LMR and example code of other victims, I ran into a wall. It's the dreaded "PWM and servopos don't mix" wall on picaxes.

crawling like a baby
this is my new robot ,it`s a baby ,it`s crawling  ,it`s very simple ,just a servo motor ,some metal parts ,and some creation ,i took this idea from AndyGadget in … Read more

Is it possible to control a linear actuator or servo with force sensitive resistors?

Hey, everyone, brand new to LMR and as of yet still unsure as to whether i'm in the right place or not.

 BASICALLY, my overall goal is to build a powered exoskeleton. I'm not joking, I'm absolutely serious. I want to build a powered exo. The first hurdle I'm coming across is how I would control the thing, and what I've got in my head is a system using a pair of force-sensitive resistors to control a variable-speed smart linear actuator or servo.

 Before I get much deeper into this, first off, I want to know if this is possible, second, what other hardware would I need.

help needed with picaxe-08m code

g'day all
i have a problem with programming i was hoping somebody could help me with.
i have the Picaxe 08m servo controler board http://www.rev-ed.co.uk/docs/axe024.pdf
and the Picaxe srf05 www.rev-ed.co.uk/docs/SRF005.pdf

SolderJunkie Construction


Hi, I have started work on project named SolderJunkie. I want it to be a motorized solder fume extractor. He is going to use a Picaxe 28x1 as his brain, DAGU IR compound eye, few servos and CPU cooler for parts. I only started construction of mechanics, so far. Here is his first pic:


Automated Light Switch - Laziness Prevails!

The Video explains all.

This is my automated light switch, built in a little under 2 hours. Just one application that a servo can be used for.

The servo is just mounted on some hastily cut masonite, the triangular brackets are just glued to the main board with PVA, and everything else is held together with double sided foam tape.





Walks around autonomous
Using a
Hi i'm from Romania and i am 17  year old.I am in robotics from age of 13 and i will show you my scrap built 4 legs walker.I have started with two old servos and a … Read more
“The Crawler” is my first indoor robot with a range sensor. In hindsight I can see that I probably should have gone with motors and wheels, but I wanted to … Read more

How do I control 18 digital servos with a 28x1?

How do I control 18 digital servos with a Picaxe 28x1?

I have the microcontroller board with the 28x1 mounted and I've tried building the "start here" robo. 

 I now would like to know how to be able to control 18 digital servos since I am building a Hexapod :)

All I really need to know is what extensionboard I need.

Thanks in advance :) Please let me know if you need more info.

Radio Controlled Servo?

I am completely new to robot building, and electronics in general.  I am currently working on a homemade airsoft claymore.  It is designed to be toggled via a wireless remote control. The issue is that I don't know much about wiring remote controlled systems. I've built a few remote controlled cars, but they were from kits, so I really didn't understand the electronic aspects: I just assembled them by following the instructions. Here is my problem with my current project:

Walks forward and backward, turns in place, avoids obstacles.
Using a
This is a simple three-servo hexapod robot using the Pololu Micro Maestro as a controller.  The Micro Maestro allows allows me to sequence gaits and integrate … Read more

The most useless machine ever

This is a "most useless machine" i made. I used a instructable but it was a comment by "compukidmike" that was the schematic i used. 

here is compukidmike's schematic picture thing  http://www.instructables.com/files/deriv/FCQ/XPAC/G43EFYKB/FCQXPACG43EFYKB.SMALL.jpg 

Last weekend we had a nice weather, and I made a Light in the garden, and decided to make a photo of it with my robot next to … Read more

Can i control a servo with a 555 timer?


I would like to sweep a servo back and forth, and theres no point on using the arduino for this, and thats all i have at the moment, so if i supply 0v to the yellow wire on the servo(signal) and then supply it with 5v, then 0, then 5v again.... would it sweep the servo? or does it have to be modulated?



My first robot, A 4 legged walker, Still a long way to go :D

Hello and greetings from Norway.

Since the winter is creeping upon this very cold land that I live in, and the sun is hiding just about all the day, its time to start some indoor project.

I have always been fascinated by DIY robots and have had many "Brilliant" (horrible stupid) ideas for designing and building them.

But finally i have started a robot project for real. wohoo!


How to reduce servo noise?

So it has come to my attention that like motors, servos too need capacitors over the power and signal lines. Well my question is exactly what value capacitor and on what servo pin. I looked online and could not exactly find it, maybe you have a link. I dont know if it is specific to what servo you have but here is the link to mine http://www.hobbypartz.com/topromisesg9.html

SSS - Servo Suspension System

This is my first experiment with the MakerBot. I am totally thrilled with this machine!!!

SSS (servo suspension system) is designed to support standard servo motors and act as a basic suspension. It is still a work in progress and has not been tested yet.

Will update results as soon as possible (still waiting to have my lab back).

I would like to know everyone's opinion on this  :)

Practical question about servos and capacitors

I have read in many places on this site about using capacitors to reduce motor and servo noise. I am now using 0.1 uF capacitors across the leads of my motors as standard practice. I'm also using 470 uF and 0.1 uF capacitors around both sides of my voltage regulator. As yet I haven't tried applying a cap to a servo, and I have a quick question.

finding cheap RC ESC (speed controller)

I love RC ESCs. They are electronic speed controllers that you connect to a servo output on a RC receiver or a micro controller, and they give you full step free control over a big motor in both direction. Most of the ones made for RC cars work in the voltage range 6-8.4Volts, but there are several alternatives for people who plan to run up to 24 volt motors in almost constant stall at a gazzilion amps (read robot war contenders).

But I'm the eternal cheapskate, and wants the cheapest there is.. So far I've found this 

My 1st non-breadboard circuit :)

I know..a lot of you good folks could solder before you could walk and probably sleep with a soldering iron under your pillow (hope you remember to turn it off :), so here is this guy in his 30s bragging about his first circuit. Pathetic.

However soldering is a major challenge to me and actually the main reason I didn't get started with robotics years ago. It's just not easy for my unsteady hands. So I'm very happy to declare that I just finished my 1st working non-breadboard circuit. It's a motor+servo shield for my Arduino.

Servo controller using timeframes

I have four servos with the following specs:


About the size of 2 postage stamps, the Simple Servo Tester lets you test two digital or analog servos without using a transmitter or receiver, just plug in your … Read more
Roams around, avoids obstacles with ultrasound and ir
Using a
This is propably fourth or fitfh evolution version of my first finished and working robot ever built. It has Oopic-R controller as brains, 2 cont.rot. modified … Read more