Recent content by Ingyil

Hi. I want to know what you think about this, that's why I write this message. According to the function u(t): ____ | 1, t>0 u(t)=| ?, t=0 ____ | 0, t<0 What do U think about the value of the function u(t) when time is 0? Is it define? or not? Some books say that the value is 1...

Hi. What RFbeginner told U is a good project, I made once this type. U don't have to use power sources or batt's, only a big antenna, an earphone (like the old phones), and creativity making the inductance. It works better if you use a mobile indictance inside the first one. Bye.

Hi. I want some information about how to make this. But that's not the prob. the prob. is that you can only use: Diodes (Normal & zener), capacitors, inductors & resistors, U can not use complex devices. If U know something, please reply this message. Thanks. Ingyil. Colombia, S.A.