Let's Make Robots!

DC motor question

I was walking through Lowes the other day, and found this great trash can that looked like a robot to me. I was able to pick it up for super cheap!! What I want to do is add two DC motors to the bottom and a caster wheel. I want to make this robot carry my books around school for me. I am lugging more text book weight than I ever did in the Army with my ruck sac. My physics book alone is killer.

Trash Can

Ping))) or SRF05?

I would like to get some sonar sensors, but I cannot decide if I should get the parallax PING))) or the SRF05?


Which one to pick?

Windscreen wiper motor

Hi All,

Got my hands on 4 new windscreen wiper motors for 40 euro in total. Which should get me started with building something nice. The seller told me it is one for a VW Golf which I checked on other sites and they look the same.

Of course I opened it up and it has a couple of metal connections (see picture 'inside') on the gear wheel which connect to wires going to the outside (to make the wipers go left and right I presume. That would make a nice rudimentary odometer don't you think?

My PROBLEM (if it is...) NO SPECS

High-End Radio Gear

My remote control car met the end of its life last week. (smashed into a wall...) So, i salvaged everything i could, and found some interesting stuff:

A Motor Controller

Transmitter/Reciever (can control 2 servos)

5 batteries, ranging from 1500 to 2000 mAh

I also had lying around:

2 radio transmitters

a second switch for the motor controller


I need:

-arduino proto shield

-lots and lots and lots of polymorph. like a shoebox full. a shoebox from someone with canoes for feet.

360 Range Finder

I just received my SRF05 and I can't wait to start using it.  While I was thinking about it, it occurred to me that I always see the SRF05 mounted on a servo, which allows maybe a 180 degree field of view for a robot. I wondered if anyone ever mounted a range finding sensor on a motor so a robot could see in every direction. 

I think I may try to build a 360 degree range finder, but I wanted to open this as a topic and get some ideas. Here's what I'm planning. Let me know what you think.


I was wondering...

Can you controll an electromagnet with a PICAXE?

if so how?

Many thanx in advance :)

Controlling a DC Motor (Mabuchi FA-130)


I'm trying to run a Mabuchi FA-130 (#18100) DC Motor, it uses 3V and 2.1A when stalled. However, I did some measures and when I forced the motor to stall it consumed nearly 4A, but I think this was some sort of coincidence since It has never happened again.

I'm using a circuit similar to this one posted by Simon Z in his post:


(By Simon Z and taken from http://letsmakerobots.com/node/7990)

Just starting, help me decide which parts to get

I want to start getting into bulding my own robots and I have been looking around this site every now and then for the past year or so. I'll probably start with something like the "start here" bot or at least use a lot of the info for messing around. I already understand basic quite well so I should be able to pick it up fast. I'm trying to figure out all the things I should get and here's what I got.

[French] Science & Vie Hors-série n°247 : Le siècle des robots

(sorry for those who don't speak french)


Science&Vie a sorti ce mois-ci un hors-série spécial robot (150 pages, pas une seule pub!), et c'est vraiment très très intéressant... Les articles parlent de tout, l'historique, les applications militaires, ou en médecine, les robots au quotidien, les nano-robots, les interactions homme/machine et même la robotique amateure ququi nous est si chère...