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vishal gupta
vishal gupta vor 6 Stunden
Dear Sir, Please share 2.0 version circuit link if possible and possible to add opto for zero crossing detector.  
IR Remote Control Learning Dimmer or Heat Control [140279-I]
Guenter Klomann
Guenter Klomann vor 12 Stunden
The coding principle is quite simple: You EXOR the data stream and the random data. This always is working independent of the other communcation layers, and is (mathematically proven) unbreakable, if the random data is really random. I remember, that there are some hardware random generators, which are quite good, but I do not remember the details (Something was described in ELEKTOR or ct a few month ago?) The second important thing is the exchange of the random data between source and destination (memory space is no problem in these days). What about a small device, which say "let us exchange our codes" (by NFC or similar) instead of handshake or kissing when you meet your friend? I think, this is a better project, than optimizing the communication of encrypted data.
One-time pad OTP Crypto System
Calpe
Calpe vor 1 Tag
Quenton, after many years of servicing electronic equipment, electroyltics are always the first culprit that are checked first. It's good that there are so many variations in this project and again the posting in DiyAudio web site is great: - http://www.diyaudio.com/forums/chip-amps/301100-my-q-watt-project.html
Q-Watt - Simple Audio Power Amplifier (110656)
Quenton
Quenton vor 1 Tag
Yeah I know you're right. It would be no fun if everyone did it the same way. The spec is 400,000 hours at 40 deg on the Vishay 101s. Almost as good as EPCOS. But reality is another thing... You are right though - electrolytics dry out relatively quickly if unused. Can be 'reformed' with care. Q.
Q-Watt - Simple Audio Power Amplifier (110656)
Calpe
Calpe vor 1 Tag
I fully agree with Pascal, always take on board an electrolytics life span and the fact that they dry up. e.g.http://uk.rs-online.com/web/p/aluminium-capacitors/8712748/?searchTerm=871-2748&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D3837312D32373438267374613D3837313237343826 This example shows us: -Lifetime1000 (Shelf) h, 3000 (Endurance) h
Q-Watt - Simple Audio Power Amplifier (110656)