I have study and conducted great deal of research on electronics component and microchip/ic with their relation and reaction to one another, this basic knowledge has make me an inventive one and forwarding me to test my hand. however. I have replicated a flashlight and remote control using "diode, capacitor, transformer etc" from old electronic board (though not so neat).....Now I want to challenge myself in big things and this is where i need your help for advice. can you please think of any simple new and unique electronic gadget one can build, pls apply deep imagination and reply me. THANKS