thank you very much audioguru and hero999 :D (that's a lot of help)
ahhh.. so those are the reasons why such thing don't exist (it is not feasible to use that technique).
well.. I also have this one idea- (I have not yet made some researches)
it is about "easy file sharing"- copying of files...
The number of aircraft accidents involving birds are too alarming that's why I have come to an idea to use ultrasonic waves to repel them so that the incident of planes being hit by a flock of bird will not happen. I have done researches about this, but I found out that bird repellents...
??? i have purchased a wrong 7segment part no.
i have bought els411 instead of els422. the nearest electronics store is a 2.5hours trip from my province and i can't afford to travel that far to purchase a common anode led display.
i am currently working on my project using 7447. could i still...