Tagged Questions

-1
votes
2answers
72 views

iPhone control LED light without wifi

I am fresh to the electrical engineering, and actually I am a web developer, ruby and php, etc. I am wondering that is there a simple way to control one or more LED lights using iPhone without wifi ...
4
votes
3answers
973 views

IR to audio converter (frequency and level)?

What kind of IR detector and converter circuit could be used to down-convert an IR remote signal (in the neighborhood of 35 to 45 kHz) into audio frequency signals (0.1-20 kHz) of the appropriate ...