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2) „Button Resistor Ladder“<br> | '''2) „Button Resistor Ladder“'''<br> | ||
The first experiment with matrix structures consists of buttons that are connected via a series of resistors. <br> | The first experiment with matrix structures consists of buttons that are connected via a series of resistors. <br> | ||
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[[File:button_matrix_ladder.jpg]]<br><br> | [[File:button_matrix_ladder.jpg]]<br><br> | ||
[[File:button_matrix_serial.jpg]] | [[File:button_matrix_serial.jpg]] | ||
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'''3) hacking a toy keyboard, triggering it with relays + exploring its inner architecture''' | |||
In the second experiment we took apart a toy that included a keyboard matrix to play a collection of sounds. <br><br> | |||
We traced each tone on the matrix and soldered external wires to the sound terminals. <br> | |||
This allowed us to access the sounds by using another switching concept in order to trigger each sound.<br> | |||
We chose relays as our main switches and connected them to the sound device.<br> | |||
The relays were connected to the arduino and we were able to trigger and cut off single sound files coming out of the toy electronics.<br><br> | |||
PIC 1 | |||
PIC 2 | |||
I then decided to explore the matrix of the toy keyboard a little further. <br> | |||
A drawing helped me to understand and trace the switches of each bottom connector. <br> | |||
I then attached an extension in order to access the bottom connectors. <br><br> | |||
PIC 3 | |||
PIC 4 | |||
Attaching a 555 timer in astable mode: <br><br> | |||
PIC 5 | |||
VIDEO | |||