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Step 3One last small challenge
The flexible LED's were functioning a the left shoulder showing the code.
The Atmega328 worked on 2 AAA batteries at 2.8 Volts and the LED's were used without resistors. (On the Arduino with 5V you have to use a resistor not to let your LED's explode.)
I wanted a quick solution at the other shoulder, which will be replaced of course!
So there was a cheap set of 20 LED's running on three AA batteries. Christmas LED's! For about 2 euro's:
Using this is simple, see this tiny instructable for that:
http://www.instructables.com/id/Simple-Transistor-Switch/
The trick was the voltage: these LED's run on 5V, but the LED's in the vest on 3V. So how do we solve that? The three batteries for the group of LED's can also be connected using only 2 batteries for the atmega328 and the blue LED's!
Batteries are always the hidden challenge of smart textile and other electronic projects.
The Atmega328 worked on 2 AAA batteries at 2.8 Volts and the LED's were used without resistors. (On the Arduino with 5V you have to use a resistor not to let your LED's explode.)
I wanted a quick solution at the other shoulder, which will be replaced of course!
So there was a cheap set of 20 LED's running on three AA batteries. Christmas LED's! For about 2 euro's:
Using this is simple, see this tiny instructable for that:
http://www.instructables.com/id/Simple-Transistor-Switch/
The trick was the voltage: these LED's run on 5V, but the LED's in the vest on 3V. So how do we solve that? The three batteries for the group of LED's can also be connected using only 2 batteries for the atmega328 and the blue LED's!
Batteries are always the hidden challenge of smart textile and other electronic projects.
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