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GMU:Sensor Hacklab/Christian Doeller (view source)
Revision as of 07:21, 15 June 2016
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In the second experiment we took a closer look at a toy including a keyboard matrix to play a funny collection<br> of sounds.<br> | In the second experiment we took a closer look at a toy including a keyboard matrix to play a funny collection<br> of sounds.<br> | ||
At first we traced each tone back to its switch on the matrix.<br> | At first we traced each tone back to its switch on the matrix.<br> | ||
Then we soldered | Then we soldered wires to the sound terminals in order to make the sounds externally accessible.<br><br> | ||
[[File:hacked_toy_matrix_l1.jpg]]<br><br> | [[File:hacked_toy_matrix_l1.jpg]]<br><br> | ||
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We had the idea to further influence and control the sounds with an external switching device.<br> | We had the idea to further influence and control the sounds with an external switching device.<br> | ||
Our solution was a chain of two relays controlled by the arduino via a | Our solution was a chain of two relays [http://cdn-reichelt.de/documents/datenblatt/C300/RELAIS-FTRK1.pdf (this one)] controlled by the arduino via a darlington transistor [http://www.pollin.de/shop/downloads/D101063D.PDF ULN2803]. [https://en.wikipedia.org/wiki/Darlington_transistor (see Darlington Transistor on Wikipedia) ] <br> | ||
These relays allowed us to turn the sound on and off so that little pieces of the sounds could be cut out. | These relays allowed us to turn the sound on and off so that little pieces of the sounds could be cut out. | ||