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Author Topic: My Fire-Bot  (Read 1404 times)

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Offline robotiksistemTopic starter

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My Fire-Bot
« on: September 11, 2010, 04:25:46 PM »
Fire-Bot is an autonomous mobile robot project, that can find the candles and blow them out.
Fire-Bot is controlled by PIC16F877A. It has two DC motors and a servo motor. The DC motors are controlled with L293D integrated motor driver by using PWM of PIC16F877A.

To detect the candles Fire-Bot uses its Sharp GP2Y0A21YK0F sensor and to determine whether or not it is close enough to the candle the robot has also a TSOP1738 IR sensor. At the beginning Fire-Bot measures the room's temperature with DS1821 temperature sensor placed on the fan and takes this temperature as the reference. When Fire-Bot catched the candle, it measures temperature and turns on the fan in order to blow the candle out. After the candles is blowed out, the fan is turned off.

you can watch its video
http://www.robotiksistem.com/robotproject.html




Offline voyager2

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Re: My Fire-Bot
« Reply #1 on: September 11, 2010, 06:44:43 PM »
I can see one problem with it, the fan is likely to blow more oxygen (O2) on the candle, therefore fueling it.
When you blow out, CO2 accompanies the O2 staving the flame of O2
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And it was good.

Offline robotiksistemTopic starter

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Re: My Fire-Bot
« Reply #2 on: September 12, 2010, 02:45:43 AM »
I also know that, but here the topic is to perform the mission as simple as possible. I've used just a fan that i got at home, to blow the candle out. In order to blow out the candle without any problems, the fan is accerlerated and then made slower continuously.
« Last Edit: September 12, 2010, 02:49:31 AM by robotiksistem »

Offline voyager2

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Re: My Fire-Bot
« Reply #3 on: September 12, 2010, 03:27:16 AM »
A short, fast burst should do it (like you said).
Working reliably is the main thing!
And Admin said "Let there be robots!"
And it was good.

Offline TrickyNekro

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Re: My Fire-Bot
« Reply #4 on: September 12, 2010, 06:52:45 PM »
A motor from an El chepo hair blower should be more than fine...

But you should check that is indeed an el chepo with a DC motor...

Or else you are going to have much much trouble driving it....
For whom the interrupts toll...


P.S. I've been inactive for almost a year... Don't give promises but I'll try to complete my tutorials. I'll let you know when..

Cheers!

 


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