Let's Make Robots!

Sharp GP2D120 IR Sensor Readings

Hi.

 

I just built my first robot following the "First Robot" tutorial. The only problem I am having is with the Sharp GP2D120 IR sensor. When I run the code as per the tutorial (i.e. "readadc 1, b1" and "debug"), the values for b1 are displayed as:

 

123, $7B, %01111011, '{'

 

The readings do not change even if I put something in front of the sensor. Do those readings provide a clue as to what is wrong with my robot?

 

Thanks for any help you can provide.

 

TH 

ultrasonic sensors > differential steering

Hi there,

 

I'm a total no nothing about robotics person.

I'm trying to connect the differential steering system of an old electric wheelchair to between 4 and 6 ultrasonic sensors.

 can anyone help me, is a there a kit i could obtain? maybe something i could adapt?

 

thanks everyone!

 

Matt

 

 

 

Battery charger (method) for lead acid battery

Hi all,

Got my hands on 4 of these babies battery

They were for free so i have to use them:-) Would like to have 12V and as much power as possible so I was thinking of this setup:

batterycharger.jpg

QUESTION 1: can I just charge this whole thing with a suitable chargers as if it is one big 12V 20Ah battery or do I have to do something differently?

Has anyone tried the X2 chips yet?

I just ordered a couple 28X2 chips for my porch gardening project, and the changes they listed in the info was sort of confusing.

I'm just wondering if any of you guys out there have tried them yet, and have any comments/gripes/tips/tricks about the newer chips.

I really wanted to try out the 28X2 module they made to compete with the Basic stamp, but I'm poor.

-Z

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.