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The last OP-AMP I came across in my research is the 741, which I | The last OP-AMP I came across in my research is the 741, which I haven't tested already but I will add some schematics that I found online about this too. | ||
[Brief digression 'zener diode': A zener diode helps to clamp the current voltage down to a specific voltage to protect devices from too high voltage | |||
https://de.wikipedia.org/wiki/Z-Diode] | |||
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== ASSIGNMENT 3 - | == ASSIGNMENT 3 - Detecting Vibrations == | ||
<br> | <br> | ||
Video <br> | |||
https://vimeo.com/150836328 | |||
Work in progress | |||
When you google vibration (in German) the first entries you will get are about safety precautions on working spaces. It says, that their impact on people can range from disturbance and performance loss over health hazard to health damage (Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung). | |||
Vibrations are less acoustic and more about a sensory feeling. If something that you are standing on is vibrating you will feel it but you won't either see nor hear the vibrations only what's vibrating is recognizable. The phenomenon is stuck to materials. I would be intersted in de-materialising vibrations and make them noticeable on different levels. I am interested in researching more the concepts of sound and vibration which often are used in similar ways. The idea I would like to pursue is to work on an installation that reacts to vibrations sensed by piezos. It would be nice to have some closed self-fulfilling system that uses and causes vibrations. | |||
In first place I need to work on a stronger signal coming from the piezo element. Therefore I will do more experiments on different OP-AMPs and also different components that can effect the outcome. | |||
Schematic of LM386, piezo mic as an input and a LED as the output | |||
[[File:lm358ayla.jpg]] | [[File:lm358ayla.jpg]] | ||
== Experiment: Loudspeaker-Printing with Silk screen printing method == | |||
<br> | |||
Work in progress | |||
With conductive ink I tried to print spiral-shaped forms on textiles and paper with the silk screen printing method. It was the first time that I tried silk screen printing. The prints were acceptable but the most important point was that they should be conductive. With some ironing of the prints the conductivity got better. | |||
[[File:loudspeakerayla1.jpg]]<br><br> | |||
''Two forms on Jeans and cotton cloth'' | |||
[[File:loudspeakerayla6.jpg]]<br><br> | |||
''Coloured conductive ink'' | |||
[[File:loudspeakerayla5.jpg]]<br><br> | |||
''Loudspeaker on paper'' | |||
I also built an amplifiyer circuit with the LM386 and used an old headphone jack to connect my smartphone to the circuit, so that the sound that was coming from my phone could be listened to on the printed loudspeakers. | |||
It did work but really silent. Right now there are some points I need to trouble shoot but I think with some better wireing and the pure silver ink I could get better results. | |||