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What is it? It is a small board controlled by a little ATtiny13 that lights up a group of LEDs that form your favourite letter (It can be your initial, your friend's or your lover's one!) and has fou…Read More…
It is a small board controlled by a little ATtiny13 that lights up a group of LEDs that form your favourite letter (It can be your initial, your friend's or your lover's one!) and has four different modes you can change by the press of a button.
I made it because I wanted a keychain that showed my interest in electronics and what is more electronic than a microchip and some LEDs? That's how this keychain was created. Thanks to the little grid made of three columns and five rows it can display any letter of the alphabet
This keychain is perfect because anyone can solder any letter and at the same time program an ATtiny (if you like) and also practise SMD soldering!
Another advantage is that it is very small and you can carry it around with your keys or wherever you want! In addition, the LED colour can be different, I soldered red LEDs but you can solder the colour you want!
The four modes are all on, slow blink, fade, and fast blink. However, if you check the Instructables page where I explain how to make this cool keychain, you can download the code and change it or even make a new one!
The KIT includes:
Please note that the CR1220 Coin Cell Battery is not included due to shipping restrictions.
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Tobias | Sept. 9, 2021
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