Journal #7049
Posted 13 years ago2011-02-17 12:05:03 UTC
Arduino is great!
I learned how to make a led blink, then I applied the procedure for more leds to flash them rapidly. It was like Christmas lights on steroids.
Then I made a RGB led change colour when selecting a color channel with a button and adjusting it with a potentiometer.
Today I made an EMF detector. No phantoms though :)). The most intense EMF I detected was near the TV. It was cool to let the detector near a cellphone, and when calling that cellphone the LED started blinking.
Oh well... it's fun but the problem is that I'm short on some basic materials like transistors ( to isolate the logic circuit from controlling a motor for example). I have some transistors but they only support 100 mA. I need something above 500 mA for small DC motors or running a HDD disk.
I learned how to make a led blink, then I applied the procedure for more leds to flash them rapidly. It was like Christmas lights on steroids.
Then I made a RGB led change colour when selecting a color channel with a button and adjusting it with a potentiometer.
Today I made an EMF detector. No phantoms though :)). The most intense EMF I detected was near the TV. It was cool to let the detector near a cellphone, and when calling that cellphone the LED started blinking.
Oh well... it's fun but the problem is that I'm short on some basic materials like transistors ( to isolate the logic circuit from controlling a motor for example). I have some transistors but they only support 100 mA. I need something above 500 mA for small DC motors or running a HDD disk.
5 Comments
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I don't know much about all this stuff, but it's worth experiementing with it. My uncle is kinda into this stuff, so it would be fun for both of us trying things out.
Next step: controlling my old HDD steppper motor.
You can do it with a 555 timer and a basic BJT.
Use a potentiometer to modulate the pulses thru the 555, and have that output to the base-leg of a BJT.
done =]