Wow you are really paranoid! Adam helped me pick out the best amplifier and looked over the RF gain stage layout to make sure it was nice and clean, since he did this for a living. Sure I could have done everything without any extra eyes but then the jammer might not have been as effective and that would be so sad:~(
If you check back, next week, I'll have project on how to build your own 4 layer boards with popsicle sticks and glitter!
Don't worry, its plenty bright! Its bigger only because it has more LEDs, and nice 6 degree lenses. If you RTFA you'll see we suggest going with green LEDs for best effectiveness but this has an RGB rave mode for going to parties. That way we can take it out to raves!
Also, please note that LEDs are not driven "continuous current" not sure where you got that from
Strobe/flashing weapons arent new. The patent is actually for a more specific device that scans while it strobes. There actually isnt a patent for just a strobing weapon, which may be because there was prior art.
Theres no schematics in the patent. The flashblinding effect was documented over 100 years ago by scientists like Bruke and Broca. There's really nothing very complex going on, its a green flashing light at about 8-10 Hz...which makes it a great intro-to-Arduino project!:)
There's no missing information. The flashblinding effect was documented over 100 years ago by scientists like Bruke and Broca. There's really nothing very complex going on, its a green flashing light at about 8-10 Hz.
We decided on going with a PTC because it protects the entire circuit. So, even if by some assembly error the FET was pinned high, the PTC would not pass more current than the FET and inductor are rated for at continuous DC. And PTCs are pretty cheap nowadays, ~20 cents each.:)
ancient hacker,
the chip has a 'always on WDT' and the only place the dog is kicked is a function where we also set the timer & port registers fresh. if a register freaks out, say the one that has the port direction or the PC, then either the dogkicker will be called (and reset the registers) every 2 seconds OR the chip is completely latched in which case the WDT will reset the chip. same with the BOD, which cuts in at 1.8V (the chip can run down to 1.8V)
however, there is -always- a possibility for cosmic waves, so our design accomdates a pulldown to the fet gate and a 200mA 0.1 polyfuse after the DC jack. all shipping kits have this (we'll update the schem shortly). experimenting with wreaking havoc on the FET and causing a dead-short, the fuse kicks in and 'stabilizes' below the rated DC current for the inductor and FET.
thanks for helping us think about all this again, if you're still reading this send us a note support@adafruit and we'll send you out a kit once we ship the first round of orders out.
yes its a cool trick! sadly those circuits work only with AC. if you put DC in you'd be disappointed with the output:)
there are DC 'switch cap' converters, they seem to show up in RS232 converters a lot
it is firmware controlled but its set once, its not like an interrupt has to go off at the exact right time. AVRs are pretty good about not freaking out as long as you have BOD set and a WDT (which it does).
also, to make the clock display brightness adjustable you cant just use an RC oscillator...how would you set the PWM duty cycle?
could it *possibly* screw up? sure. just like logic chips sometimes die or glitch. but its not medical equipment, theres no interlocks, its a DIY desk clock kit in a plastic enclosure.
Ha! good luck adding a radio receiver to a clock with both a multiplexed display and 32khz boost converter. WWVB receivers wont work within 10 feet of this clock. (yes, we've tried it)
Yup! If you look at the schematics or design document you will see how this works - its described in detail there but basically: If power is unplugged, the microcontroller kills the display and runs at 50uA off of a coin cell for a couple of weeks until power is restored. the low power RTC is used when theres a blackout or the clock is moved, etc.
Its a big pet peeve, all clocks should do this!
if you read the design document, schematic and source you'll see theres a lot more in there than just a counter. theres day calculator, date, alarm, low power mode, RTC, HV boost, menu system with configuration, etc etc. a $2.50 microprocessor isnt overkill when you consider its doing -everything- except drive the HV VFD.
if it was just a timer divider, it would be a rather boring clock! if you read the design document, schem or source code you'll see theres a lot more in there than just a counter:)
Hi Anon. I designed the wave bubble project in mid 2004 as part of my research work. While the Bubl Space project is named somewhat similarly, the wave bubble is not based on it or stolen from it or derived from it. The BublSpace project is, in fact, conceptual and never functionally existed: http://www.textually.org/textually/archives/2004/08/005007.htm
Whereas the wave bubble is a fully functional design, completely documented, and open source.
accessing a SIM thru a cell phone is almost always done at the application layer...you can read and write SMS's but you can't 'undelete' or see low-stuff information like the the last-accessed cell tower location
yes i'm reading the comments here and i dont think its very funny either.
the only reason girls seem to be 'resistant' to these sorts of comments is because those that dont like it leave or are shunned.
Slashdot Mirror
Wow you are really paranoid! Adam helped me pick out the best amplifier and looked over the RF gain stage layout to make sure it was nice and clean, since he did this for a living. Sure I could have done everything without any extra eyes but then the jammer might not have been as effective and that would be so sad :~(
If you check back, next week, I'll have project on how to build your own 4 layer boards with popsicle sticks and glitter!
Oh we have a spectrum analyzer here, thats what we used to debug the DIY cellphone jammer project http://www.ladyada.net/make/wavebubble
OMG! Don't tell the US DHS! They'll be way bummed!
Don't worry, its plenty bright! Its bigger only because it has more LEDs, and nice 6 degree lenses. If you RTFA you'll see we suggest going with green LEDs for best effectiveness but this has an RGB rave mode for going to parties. That way we can take it out to raves! Also, please note that LEDs are not driven "continuous current" not sure where you got that from
Everyone at the party we went to said "wow that is really fucking bright" and asked us to turn it off. That's all the research I need! *pew* *pew*
It works great for the flashblindness, nausea, dizziness, disorientation. The occasional vomiting? Maybe not ;)
Strobe/flashing weapons arent new. The patent is actually for a more specific device that scans while it strobes. There actually isnt a patent for just a strobing weapon, which may be because there was prior art.
Theres no schematics in the patent. The flashblinding effect was documented over 100 years ago by scientists like Bruke and Broca. There's really nothing very complex going on, its a green flashing light at about 8-10 Hz...which makes it a great intro-to-Arduino project! :)
There's no missing information. The flashblinding effect was documented over 100 years ago by scientists like Bruke and Broca. There's really nothing very complex going on, its a green flashing light at about 8-10 Hz.
Actually, it does precisely the same thing as any other 'flashing weapon', gives you a headache and makes your eyes hurt
It works great for the flashblindness, nausea, dizziness, disorientation. The occasional vomiting? Maybe not ;)
We decided on going with a PTC because it protects the entire circuit. So, even if by some assembly error the FET was pinned high, the PTC would not pass more current than the FET and inductor are rated for at continuous DC. And PTCs are pretty cheap nowadays, ~20 cents each. :)
ancient hacker, the chip has a 'always on WDT' and the only place the dog is kicked is a function where we also set the timer & port registers fresh. if a register freaks out, say the one that has the port direction or the PC, then either the dogkicker will be called (and reset the registers) every 2 seconds OR the chip is completely latched in which case the WDT will reset the chip. same with the BOD, which cuts in at 1.8V (the chip can run down to 1.8V) however, there is -always- a possibility for cosmic waves, so our design accomdates a pulldown to the fet gate and a 200mA 0.1 polyfuse after the DC jack. all shipping kits have this (we'll update the schem shortly). experimenting with wreaking havoc on the FET and causing a dead-short, the fuse kicks in and 'stabilizes' below the rated DC current for the inductor and FET. thanks for helping us think about all this again, if you're still reading this send us a note support@adafruit and we'll send you out a kit once we ship the first round of orders out.
yes its a cool trick! sadly those circuits work only with AC. if you put DC in you'd be disappointed with the output :)
there are DC 'switch cap' converters, they seem to show up in RS232 converters a lot
it is firmware controlled but its set once, its not like an interrupt has to go off at the exact right time. AVRs are pretty good about not freaking out as long as you have BOD set and a WDT (which it does). also, to make the clock display brightness adjustable you cant just use an RC oscillator...how would you set the PWM duty cycle? could it *possibly* screw up? sure. just like logic chips sometimes die or glitch. but its not medical equipment, theres no interlocks, its a DIY desk clock kit in a plastic enclosure.
Ha! good luck adding a radio receiver to a clock with both a multiplexed display and 32khz boost converter. WWVB receivers wont work within 10 feet of this clock. (yes, we've tried it)
Yup! If you look at the schematics or design document you will see how this works - its described in detail there but basically: If power is unplugged, the microcontroller kills the display and runs at 50uA off of a coin cell for a couple of weeks until power is restored. the low power RTC is used when theres a blackout or the clock is moved, etc. Its a big pet peeve, all clocks should do this!
if you read the design document, schematic and source you'll see theres a lot more in there than just a counter. theres day calculator, date, alarm, low power mode, RTC, HV boost, menu system with configuration, etc etc. a $2.50 microprocessor isnt overkill when you consider its doing -everything- except drive the HV VFD.
if it was just a timer divider, it would be a rather boring clock! if you read the design document, schem or source code you'll see theres a lot more in there than just a counter :)
the PWM is hardware controlled and there's a WDT its as reliable as any 'off the shelf' chip...even 555's latch up if set up wrong ;)
Hi Anon. I designed the wave bubble project in mid 2004 as part of my research work. While the Bubl Space project is named somewhat similarly, the wave bubble is not based on it or stolen from it or derived from it. The BublSpace project is, in fact, conceptual and never functionally existed: http://www.textually.org/textually/archives/2004/08/005007.htm Whereas the wave bubble is a fully functional design, completely documented, and open source.
accessing a SIM thru a cell phone is almost always done at the application layer...you can read and write SMS's but you can't 'undelete' or see low-stuff information like the the last-accessed cell tower location
Oddly enough, its TTL serial (9600 baud) with a shared RX and TX line. The TX half is open collector so you need a pullup.
From all the documentation I have read on smart cards, 3V (and 1.8V) cards are an extension of the 5V SIM spec. That is, they work at 5V as well (but with higher power usage, of course). If you have specific documentation otherwise, please post it. Secondly, I assure you the quality of my soldering is excellent (ie http://farm1.static.flickr.com/149/332269259_21900c5a01_b.jpg), but the lighting and video makes perfboard-soldering (ie http://itp.nyu.edu/physcomp/images/tutorials/perfboard/solderaperf26.jpg) look bad
yes i'm reading the comments here and i dont think its very funny either. the only reason girls seem to be 'resistant' to these sorts of comments is because those that dont like it leave or are shunned.