Let's Make Robots!

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

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 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.

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Blue plastic "gear" 

 

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Gear on motor pushing on red peg

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Side view of gear on peg

When a button is pushed on an infrared remote it makes an LED blink
Infrared Sensor (LED020) from the PICAXE store was used. http://194.201.138.187/epages/Store.storefront/?ObjectPath=/Shops/Store.TechSupplies/Products/LED020   Read more