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Arduino
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Written by Administrator   
Tuesday, 07 June 2011 00:00
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Last Updated on Monday, 06 June 2011 23:39
 
Generating sinewave with Arduino
Written by Administrator   
Monday, 06 June 2011 00:00

In this project Arduino generates sine wave by using direct digital synthesis algorithm (DDS) which allows generating any signal with variable frequencies in software. Signal type depends on look-up values in MCU memory. Signal frequency is only limited by microcontroller speed and reaches 16kHz. 16KHz is practically enough for simple audio applications.

We used to see R/2R DAC on output of similar generators, but this one uses a bit different method. Arduino generates a 32kHz PWM signal which then is filtered with low pass filter that gives smooth signal wave.

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Last Updated on Monday, 06 June 2011 14:07
 
Simple PWM DC motor control using MOSFET H-Bridge with AVR ATmega8
Written by admin   
Monday, 06 June 2011 00:00

Authors: admin


dharmanitech.com writes:

Here is a very simple project of controlling a small DC-motor (taken from an old personal cassette player) with ATmega8. The ATmega8 is having three PWM channels, out of which two are used here. PWM waveforms are fed to MOSFET (RFD3055) H-bridge. Here, direction is controlled using a two-position toggle switch and speed of the motor is controlled by two push-buttons, one for increasing the speed and other for reducing.

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Last Updated on Monday, 06 June 2011 15:22
 
Turn a mouse pad into an Ardunio-controlled drum pad
Written by admin   
Thursday, 02 June 2011 00:00

Authors: admin


This project uses an old mouse pad and a piezo sensor to create a drum pad input device. He also coded a little game in Processing that counts your beats and records your score.

Turn a mouse pad into an Ardunio-controlled drum pad -  [via]

Last Updated on Wednesday, 01 June 2011 23:11
 
Arduino Controlled Dishwasher
Written by admin   
Wednesday, 01 June 2011 00:00
;feature=player_embedded

The control panel on the front of it died, it failed from corrosion getting into the laminated plastic PCB that it’s made up of. Not really repairable, just meant to be replaced, except that it’s a $150 part. From what I could find online, it seems to be a common failure, so why buy an overpriced part that’s just going to fail all over again?This is one of the things I love about the Arduino, it allows me to consider alternatives that I’d have NEVER been able to consider before. If I had to program a controller in assembly, or flat do it with just discrete chips, I’d have never considered this as an option. But with the Arduino, not only can I build my own controller, but it’s almost stupidly simple to do.

Arduino Controlled Dishwasher [via]


Last Updated on Wednesday, 01 June 2011 22:51
 
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