This circuit here is a altered version of his original circuit.<br>
This circuit here is a altered version of his original circuit.<br>
A video demonstrating the functionality can be found here: [http://www.youtube.com/watch?v=DyLsBAO6dLQ Youtube video]<br>
A video demonstrating the functionality can be found here: [http://www.youtube.com/watch?v=DyLsBAO6dLQ Youtube video]<br>
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Since it is hard to recreate a circuit not having a pcb an a schematic, people who want to recreate the Urban cricket will find the schematics, a layout to create a pcb and a parts list here soon.
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Since it is hard to recreate a circuit not having a pcb an a schematic, people who want to recreate the Urban cricket will find the schematics, a layout to create a pcb and a parts list here.
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Schematic:
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Schematic description:
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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>
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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.
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The second oscillator works much slower at about 1 to 3 Hertz.