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[[Category:Projekte]]
[[Category:Projekte]]
[[Image:urban_cricket_without_pcb.jpg|thumb|altered assembly without pcb]]
[[Image:urban_cricket_without_pcb.jpg|thumb|altered assembly without pcb]]
= Project description =
Urban Cricket is a small circuit that imitates the call of a cricket, only being powered by a small solar cell.
Urban Cricket is a small circuit that imitates the call of a cricket, only being powered by a small solar cell.
The idea comes from Reinhard Gupfinger a Linz based artist I met during the Ars Electronica Festival 2011 in Linz.
The idea comes from Reinhard Gupfinger a Linz based artist I met during the Ars Electronica Festival 2011 in Linz.
[[Image:Urban-cricket-schematic-simply.gif|thumb|Sechematic]]<br>
[[Image:Urban-cricket-schematic-simply.gif|thumb|Sechematic]]<br>
Schematic description:
= Schematic description =
The Urban Cricket consists of three simple oscillators, a piezo beeper with built in driver and a solar cell for powering the circuit. The piezo beeper has a built in driver which means that a voltage applied will cause the beeper to generate noise not only a short click. It generates a tone at about 2,000 to 3,000 Hertz witch sounds pretty annoying ("piiiiiiiiiiiii").<br>
The Urban Cricket consists of three simple oscillators, a piezo beeper with built in driver and a solar cell for powering the circuit. The piezo beeper has a built in driver which means that a voltage applied will cause the beeper to generate noise not only a short click. It generates a tone at about 2,000 to 3,000 Hertz witch sounds pretty annoying ("piiiiiiiiiiiii").<br>
The first oscillator makes the beeper beep at a variable frequency of about 20-100 Hertz. The beeper controlled by the first oscillator sounds short 2-3khz bursts.<br>
The first oscillator makes the beeper beep at a variable frequency of about 20-100 Hertz. The beeper controlled by the first oscillator sounds short 2-3khz bursts.<br>
The third oscillator runs even slower than the second one causing the second one to stop at some times. Now the cricket sounds "brrr brrr brrr <pause> brrr brrr brrr <pause>" and so on.<br>
The third oscillator runs even slower than the second one causing the second one to stop at some times. Now the cricket sounds "brrr brrr brrr <pause> brrr brrr brrr <pause>" and so on.<br>
The the oscillator stages a coupled via diodes to make them influence the other only one way. All six not-gates a located on one ic-chip (74HC04 or 74HC14).<br>
The the oscillator stages a coupled via diodes to make them influence the other only one way. All six not-gates a located on one ic-chip (74HC04 or 74HC14).<br>
Values:<br>
= Values =
yet to come!
yet to come!
[[Image:Urban-cricket-layout-placement-top.gif|thumb|Component placement top view]]
[[Image:Urban-cricket-layout-placement-top.gif|thumb|Component placement top view]]
= Making a PCB =
yet to come!
[[Image:Urban-cricket-laout-copper-bottom.gif|thumb|Bottom view PCB layout for 18pcs. (600dpi) on a 100x160mm one-sided PCB]]
[[Image:Urban-cricket-laout-copper-bottom.gif|thumb|Bottom view PCB layout for 18pcs. (600dpi) on a 100x160mm one-sided PCB]]
= Hyperlinks =
* [http://www.soundtossing.com/ Sound tossing website]
* [http://www.soundtossing.com/ Sound tossing website]
* [https://www.facebook.com/soundtossing Sound tossing Facebook page]
* [https://www.facebook.com/soundtossing Sound tossing Facebook page]