Let's Make Robots!

LMR Global Project - Idea Phase

This thread will allow the build team of Jklug80, rik, Calculon320, slick, Edgee, CaptainTune and robologist to start working on the project and figure out what it is, what it will do and how to build it.

Currently the goal is to decide what the project is (what jklug80 proposed or something else), then we need a name for the robot, then we need a name for the group of 7 who are working on the project. We need a list of desired features, a list of REQUIRED features, and who will do what. LETS GET STARTED!

LMR Global Project

I know we have talked about this before, but I would like to get this going. I had an idea for a bot that I will likely never have the time to build msyelf. At least not for a couple years since it requires a lot of parts that I would have to figure out first and test. I would like to present that idea and find 3-5 other people who would like to work on a part of it and combine our efforts. We each post how to make our part and then we all share credit for the final project.

Returning to home base

I have an idea for a robot that would also involve it going to a wall charger when the batteries get low. I have an idea for it to send out an IR signal when the batteries get weak. The signal is received by the charging unit and it turns on a laser light. When the robot roams through the beam it detects it and uses it to align itself with the charging unit.

LMR Group on Facebook

I figured we could branch out and advertise LMR on other websites. I made a Lets Make Robots group on facebook. To join just search and join the group. I'm hoping we can get people who are in robotics groups on facebook to also join and then use our website as well. We'll see how it goes. I just need to add more info in the group and make periodic updates. I may steal Rik's weekly Pulse and add it there.

Store Sound in EEPROM

I know EEPROM can hold letters, numbers, etc, but is it possible to add a sound to eeprom? I am guessing it could be digitized and stored that way and then dumped to a variable and played somehow, but has anyone done it? I have a 1-2 second sound I would like my robot to play when it runs into something or something unexpected happens. I know I can purchase a seperate speaker/microphone kit from tech-supplies, but I would like to keep it on the PICAXE if possible since it is such a small file.

Any ideas?

Batteries Series Parallel

A few questions to make sure I don't burn something up. I am playing around with different batteries and ways to make my bots last longer between charges. I want to ensure I have this right before I hook anything up.

First off lets assume I have 5 volts hooked up to a LED (max rated current of 30milliamps) using a 150 ohm resistor (5 volts divided by .03 amps = 166 resistor to keep LED from burning out).

Series: Lets say I take a 5 volt battery pack and hook it up in series making the total voltage 10 volts.

Sensor Ideas

sensor.JPG

 This came out of a toy that was a monkey with rubber arms. When you shot him like a slingshot he screamed louder than the sound of millions of people burning in errr umm Heck.

Need help with a Torque issue (suggest motors or another method)

I'm purposely being vague because this is my next robot and I believe this to be my last issue to work through. I have the circuit working on a breadboard and this is the last piece in the physical build.

100_1006.JPG

Blue plastic "gear" 

 

100_1008.JPG

Gear on motor pushing on red peg

100_1010.JPG

Side view of gear on peg

Suggestions for a Book on Circuit Design

I have a fairly strong background in code development, but I would like to build a stronger knowledge in curcuit design. I can read a datasheet and learn how to hook up a certain component, but when it comes to using a specific component for a use other than it is designed for I lack the knowledge to know when to use a capacitor, flyback diodes, etc.

Help with IR Sensor LED020 (UPDATED)


Attached are photos of my circuit on a breadboard.

 

UPDATE IT WORKS!

I posted a video. Ignore the TV in the background. When the universal remote sends a signal it is decoded by the PICAXE (not done manually I found a setting that the sensor can read and decode itself). A LED flashes to show a signal was read. It then shows the number of the code that was sent in the debug window. In a few days I will delete this post and add a turorial. Then its off to making my robot WOOHOO.