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[[File:hacked_toy_matrix.jpg]]<br><br> | [[File:hacked_toy_matrix.jpg]]<br><br> | ||
Attaching a 555 timer in astable mode: <br><br> | Attaching a 555 timer in astable mode, | ||
using the keyboard matrix as one big variable resistor: <br><br> | |||
[[File:555_toy_matrix.jpg]]<br><br> | [[File:555_toy_matrix.jpg]]<br><br> | ||