Latarkowy TV-B-GONE high power
TV-B-Gone, a pilot who has only one, and how great feature - turns off all televisions in your area. Just press the button and enjoy the effect. Is a version with a capacity of up to 1W, and the whole is enclosed in an ordinary lantern, is not possible to distinguish and not of very suspicious - so fun guaranteed.
Was used to power the IR LEDs 1W, and the wavelength of 940nm. Receiver / IR filters used in the vast majority of televisions are designed precisely to the wavelength of 940nm, so the use of LEDs with different wavelength (np.850nm) will mean a drastic decrease in scope. Operation system is not complicated, microcontroller Attiny85 has in its memory the command off for 115 of the most popular European television, American and 115. When you turn on "Torch" to the circuit current flows, and uC in turn sends all the codes, and at the end goes into power-down mode. You can also stop sending if you already have achieved zamirzony effect, excluding ordinary flashlight. Istenieje choice of the region, the default is to select the U.S. and the EU should be soldered resistor R1. Diode itself requires a beam collimator, focusing, I used a 25 * so as to ensure good focus = radius. To be able to cover multiple receivers at once close, use a collimator with a wider angle, eg 45 *.
The device dramatically different structure from This is the minimum version, the lack of a button resetującego (annexing the following switch flashlight), signaling the lack of LEDs, the lack of pre-amplifying transistor, the lack of external 8MHz ceramic resonator, and the final transistor is n-ch mosfet in SO-8 package. In this case, the IRF7455, but it may be compatible with any pinout, and the relevant parameters - which is fully open at voltages 3.5V. Facing double-sided, with a diameter of 20mm (you can even file off to 18mm). On the upper side there are elements and wires soldered to the pads. At the bottom place of soldered springs holding the cart batteries. In the absence of a transistor which strengthen the signal while it turned, it was necessary to introduce an amendment in the program (with the help of the forum's maniek1818 electrode), so simple firmware will not work properly (and could even damage the diode) and should dispose of this Annex. Fusebity: 8MHz internal oscillator without the division by 8
Power from three AAA batteries or rechargeable batteries, identical to the original lantern. So the supply voltage can be as high as 5V with new batteries. The maximum current these diodes or 750mA is achieved exactly at 2V, the current is not here in any way restricted, it is lit only fractions of a second and immediately extinguished - it can be seen as control of filling 20-30%. R2 and C1 elements support the work of the microcontroller in the event of a sharp drop in voltage (eg, when attaching LEDs when the batteries are weak). Mechanical structures can be seen in photographs, and indeed everything is the same as in the original lantern, the only alteration is the empowerment of a new collimator in place.
Thanks for users światełka.pl forums for help with construction and latarkową inspiration. In this topic there is a discussion on the draft, I encourage you to read.
NOTE revised annex, the previous contained incorrect input!
- EAGLE 5.4.0 project files, HEX input, source C, diagram and PCB in PDF format.
.
High-power flashlight version of TV-B-GONE (v1.2). It uses infrared emitter diode 1W, 940nm wavelenght. Note that other wavelenght (like 850nm) will strongly decrase range of device. Led requires a collimator, and have used 25 *. Note that if you want to shoot from higher distance you must put a 15 * and 45 * for switch-off mane tv's at once. Supply as in original flashlight, 3x AAA batteries. Resistor R1 is for a region select, solder for EU or leave-it for U.S.. PCBs diameter is 20mm, it can be Sawn 18mm. This device differs dramatically from a project he ladyada original. There's no indicator led, no reset button (its simply switched on and off by original flashlight switch), no Inverting transistor (this has to be included in the firmware, so you must use new firmware from attachment), no ceramic Oscilator (and use internal 8MHz generator, it's accurate enough for that project). As of end-transistor and used SO-8 package mosfet, IRF7455 (or any pinout compatible with gate threshold below 3.5V). On one side there are electronic components and on other pads are solder battery pack holder (spring). For more info see schematic and original project site.
ATTENTION attachment updated, previous firmware contained invalid!
- EAGLE 5.4.0 project files, firmware HEX, C source, PDF schematics and pcb.
.
























Could you post where can we get the parts and how to program the chip? Thanks.
Could not find the C sources in the archive ...: (
Afraid to try without them. Should anything go wrong, I'll be completely astray.
Guy, the search in online stores, ebay. And program it with the AVR ISP programmer.
Aquatarkus, sorry for that, check again now, C sources are included now.
Thank you, got corrected with archive sources.
I've just started to construct my own flashlight. How did you set the fuse bits of ATtiny85? Please look if the following settings is ok and correct them if something's wrong.
CKDIV8 --
CKOUT --
SUT1 --
SUT0 +
CKSEL3 +
CKSEL2 +
CKSEL1 --
CKSEL0 +
RSTDISBL --
DWEN --
SPIEN +
WDTON --
EESAVE --
BODLEVEL2 --
BODLEVEL1 --
BODLEVEL0 --
If "-" means unprogrammed, then they are set around If you bought new uC then only thing you must do is to disable CKDIV8.
And take a look here, very helpful avr calculator http://palmavr.sourceforge.net/cgi-bin/fc.cgi
Well, I've just finished it. At first I could not find IRF7455 so I put in IRF7403. It did not work, since its the gate threshold voltage is over 4V and mosfet did not turn on.
However today I found required transistor, and now everything seems to work ok, at least at home. The only drawback is noticeable delay before turning off TV because there are too many possible codes and MCU has to go over all the options.
Anyway, tomorrow is the day of field tests:)
Aquatarkus, can you show it? Some pictures? What type of diode did you used, 850nm or 940nm? 20mA or normal?
And yeah, sending all codes (for EU) takes about 50 seconds. But most of tv's are shutting down in up to 15 seconds (15 secs shutdown takes a LG LCD).
I can not find the high power 940 nm led in any store, please help (only the little ones or 850nm).
if you can post a link it would be great.
Thanks,
Guy.
Sorry, i can not provide any link, it is hardly to find that type of diode: (
Search for EDSN-1LA3 / 1LA3 for EDEN-1W star from edison-opto. The one i used is a cheap chinese one. Take a look at Osram SFH4231, it is even more powerful but will be hard to find for this collimator.