Monthly Archives: June 2006

Achtung!

By vsergeev | Published: June 23, 2006
Most versions of this story are vaguely correct: http://www.signonsandiego.com/news/education/20060620-9999-1m20whizkid.html or http://securitypronews.com/news/securitynews/spn-45-20060620YoungProgrammerDevelopsSecuritySolutions.html But don’t you hate when you get crap like this?: http://www.theinquirer.net/?article=32543 “Already, a manufacturer has created a working prototype based on Sergeev’s design and he is trolling around the tech fairs flogging his ideas.” Yeah, I love those juicy insults. There was one (rather big) mistake in the [...]
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DC Motor Driver

By vsergeev | Published: June 16, 2006
I wrote a simple driver a few nights ago for the single DC motor driver FAN8082 by Fairchild. This is a very straight-forward 8 pinned IC. The motor is controlled by two inputs, and can be set to spin forward, reverse, or brake. Today I setup a breadboard on the car and wired the microcontroller [...]
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AVR Servo Control

By vsergeev | Published: June 14, 2006
Well, my two days worth of figuring out AVR timers and PWM produced a very small and clean servo driver. Today my two 5g servos arrived and I hooked up one of them to the chip. I setup a test program and it worked out of the box. If you care to see it, just [...]
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Manchester Encoding/Decoding

By vsergeev | Published: June 11, 2006
Like I said in the previous post, the RF receiver will pick up junk data when the transmitter isn’t transmitting anything. This means that you need some sort of encoding or decoding method of the data to differentiate from junk in the air and actual data. This can be easily done through Manchester Encoding, which [...]
Posted in AVR | 2 Comments

RF Transmitters/Receivers Arrived

By vsergeev | Published: June 11, 2006
Those RF units I was talking about in the previous post arrived today. Since the transmitter and receiver are actually separate devices, I ordered two sets at different frequencies for the robot and computer to communicate. One set is 433MHz, the other set is 418MHz. These things are very small, and after playing with them, they [...]
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Building a Basic Robot

By vsergeev | Published: June 11, 2006
Well, I’ve decided that I wanted to build a basic robot based on a toy car I recently dissected. I took out all of the cheap RF stuff in there, and left the back DC motor and gear box that gives it two-wheel drive. I also modified the front wheels so that they had complete [...]
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