8 Easy DIY Projects We Wish We’d Thought Up
Self-Watering Plant (with Arduino)
Tuesday, July 31, 2012
Tuesday, June 5, 2012
Mute TV or change channel during adverts
Does the TV signal have a special code for commercials? Can we detect it?
Two alternatives:
1. (Easy) The TV volume jumps when adverts start. You can use that jump to identify a commercial started (see comment on Israeli paper below). False positive: An explosion in a movie.
2. (Hard) Write software that has a sound fingerprint database of the first couple of seconds of common commercials which it uses to send mute signals to tv to mute it for a typical advertisement duration.
* Catch probability > 90%
* Should be able to understand that a commercial started within 3 seconds
* http://en.wikipedia.org/wiki/Pattern_recognition
* http://en.wikipedia.org/wiki/Acoustic_fingerprint
Arduino based solution: http://blog.makezine.com/2011/08/16/enough-already-the-arduino-solution-to-overexposed-celebs/
Two alternatives:
1. (Easy) The TV volume jumps when adverts start. You can use that jump to identify a commercial started (see comment on Israeli paper below). False positive: An explosion in a movie.
2. (Hard) Write software that has a sound fingerprint database of the first couple of seconds of common commercials which it uses to send mute signals to tv to mute it for a typical advertisement duration.
* Catch probability > 90%
* Should be able to understand that a commercial started within 3 seconds
* http://en.wikipedia.org/wiki/Pattern_recognition
* http://en.wikipedia.org/wiki/Acoustic_fingerprint
Arduino based solution: http://blog.makezine.com/2011/08/16/enough-already-the-arduino-solution-to-overexposed-celebs/
Israeli Students Patent Device That Mutes TV Ads, from the comments:
In Ads, the audio typically pegs the meter, ofting a clear starting point in the 'muting' process. The cadence of the track itself will doubtless offer additional 'clues,' ie.: music/voice ratio, s/n ratio.
The processor must sample your (active) program material periodically, and record a set of average levels. These are then compared to the (new) offending audio track. When the original track returns, it auto restores the signal. This process is so simple that it could easily be incorporated into every new digital TV.
Saturday, May 26, 2012
Use rentacoder for ideas
Saturday, May 5, 2012
Sunday, March 4, 2012
Insect detector
* Detection:
** Distance sensor: Is it precise enough for insect size/motion (esp. the small silver bug)?
** Trap with infrared LED+photo transistor: When insect passes through tube, detection should happen. Is LED+transistor precise enough for insect sized objects?
** Image processing?
** Distance sensor: Is it precise enough for insect size/motion (esp. the small silver bug)?
** Trap with infrared LED+photo transistor: When insect passes through tube, detection should happen. Is LED+transistor precise enough for insect sized objects?
** Image processing?
Arduino Simulator
Existing:
* Virtual Breadboard:
** See demo (includes servo example)
** Has no voltage/current transient behavior (they call it discretes).
** You can check how your algorithm will work
* Simulink SimPowerSystems
* ArduLab
** Spanish
* Labcenter products:
** Proteus VSM for AVR [item 315] (no PCB design, only microcontroller sim for Atmel AVR) = 479$
** Advanced Simulation Features [item 234] (required for transient analysis) = 319$
** Total: 800$
* emulware
* Spice (circuit simulator)
* Circuit playground (not a simulator, it's a basic calculator of electrical stuff)
* Virtual Breadboard:
** See demo (includes servo example)
** Has no voltage/current transient behavior (they call it discretes).
** You can check how your algorithm will work
* Simulink SimPowerSystems
* ArduLab
** Spanish
* Labcenter products:
** Proteus VSM for AVR [item 315] (no PCB design, only microcontroller sim for Atmel AVR) = 479$
** Advanced Simulation Features [item 234] (required for transient analysis) = 319$
** Total: 800$
* emulware
* Spice (circuit simulator)
* Circuit playground (not a simulator, it's a basic calculator of electrical stuff)
Sunday, February 26, 2012
Zaman ayarlı gaz kesicisi
Sorun: Gaz ocağına yemeği koyup salona dönüyor ve internete dalıp yemeği unutuyorum, yemek yanıyor.
Çözüm: Zaman ayarlı gaz kesicisi yap, zaman dolduğunda gazı kessin.
Teknik sorunlar:
* Gaz şalterini önce aşağı bastırmak, sonra çevirmek gerekiyor.
Dikkat edilecekler (canımızdan olmayalım, durum safety critical):
* Gaz kesicisinin gazı açma olasılığı olmamalı.
* Bir gaz dedektörü de olmalı ki alev sönmüş ancak gaz kesilmemişse uyarı versin.
* Max süre 1 saat olsun çünkü bizim yaptığımız yemeklerin hiçbiri 45 dakikayı geçmiyor.
İleri seviye model:
* Yemek tipini gir, süreyi ve gaz şiddetini sistem ayarlasın.
Hazır ürünler:
* Automatical Digital Gas Shut-Off Valve with a Timer
* Fire Magic Automatic 3 Hour Timer Gas Safety Shut-off Valve 3090
Çözüm: Zaman ayarlı gaz kesicisi yap, zaman dolduğunda gazı kessin.
Teknik sorunlar:
* Gaz şalterini önce aşağı bastırmak, sonra çevirmek gerekiyor.
Dikkat edilecekler (canımızdan olmayalım, durum safety critical):
* Gaz kesicisinin gazı açma olasılığı olmamalı.
* Bir gaz dedektörü de olmalı ki alev sönmüş ancak gaz kesilmemişse uyarı versin.
* Max süre 1 saat olsun çünkü bizim yaptığımız yemeklerin hiçbiri 45 dakikayı geçmiyor.
İleri seviye model:
* Yemek tipini gir, süreyi ve gaz şiddetini sistem ayarlasın.
Hazır ürünler:
* Automatical Digital Gas Shut-Off Valve with a Timer
* Fire Magic Automatic 3 Hour Timer Gas Safety Shut-off Valve 3090
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