Fresh Air (more than 40 meter range)
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Fresh Air (more than 40 meter range)

by Creative on Sun Jan 01, 2006 11:28 am

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Acknowledgment :

I would like to thank [ ladyada.net ] for the useful information
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by none_such on Sun Aug 20, 2006 8:03 pm

Couldn't you find a box that fits the transformer?
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by Warebear on Fri Sep 01, 2006 8:18 am

Now I see why I couldn't complete my Fresh air...heh I only had 1 of the 3 boards needed.


no wonder the PCB was confusing me...

website says "other's still being worked on..." and that would be my issue.

:roll:
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by Warebear on Sat Sep 02, 2006 10:48 pm

Does anyone happen to have all the PCB schematics for this project? I dont' care if they are big as a house I'm trying to design a case for this project, based it off the 1 pcb I could download from the main ladyada.net site but then I found out I had 2 other PCB's I was missing (seeing in the picture above.)


What I'm testing is I have an old cell phone and want to figure a way to use it's battery, and it's antenna, and power buttons and such to turn it off and on. Heh...cell phone case for a cell phone jammer...running off cell phone guts. LOL.

This is the phone I have (have 2 of them that I can "piece out")
Kyocera 3225
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I'm thinking if I can combine them into a multilayer board and remove the LCD display and just put an led to show it's off and on, nice thing is it has LED's along the side of the LCD display already so figured I would use them, this would be a neat little play toy. (for educational use and study only <.< >.>)
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some assistance

by none_such on Fri Sep 15, 2006 10:29 am

the jammer pictured above is very clear in its layout, however it is not very elegant or portable. it relies on banned power as indicated by the hefty transformer; the pcb to the right of this is the guts of the power supply - this MUST be well regulated and clean for the jammer to work properly. a quick search for AC to DC power supplies will yield the schematics for this part. the pcb on the lower left is obviously a few op amps and passive components that compose the tuning circuit; check this http://my.integritynet.com.au/purdic/voltage-controlled-oscillators.htm for a tutorial in VCO tuning with links to oscillator tutorials and this http://mit.edu/~ladyada/thesis.pdf for how the Wave Bubble accomplished its tunning feat. The pcb to the lower right is the one you already know about. If you can build this simple device then I would recommend building your denuded and canabilized cellphone-housed-jammer as the need to fit a clean DC/DC power supply and adjust your design accordingly might prove to be a huge headache on such a small scale for someone with little experience and probably no access to a spectrum analyzer. Good luck
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Re: Fresh Air (more than 40 meter range)

by tadongdropbox on Thu Jun 07, 2012 5:09 am

Cool. I'm building the 2010 version with through hole components.
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