I have a small radio(3v) and i listen to if about 12 hours a day and i dont like to spend my mony on the battries.
i am using this radio when ever i sits on my computer and i have an another big radio but that doesn't catches that station as well as the small radio..
so can i use the power supply of USP port ??????????????????
you can use 3 diodes like 1n4001 in series with the radio and the power suply. the diodes have a voltage drop of about 0.6-0.7V on each. so putting 3 in series will have a voltage drop of 2.4-2.7V wich means that the radio will get 2.3-2.6 volts wich i think that it is great.
this is the simplest solution i can think of. you might use a zenner diode and a transistor.
you might use only 2 diodes.......
When using the discretes ensure that the pin 2 and 3 are left alone (No Connection) adding any componets might let the PC (host) think that yer radio is another USB device, juz watch out.
You could also get a drop down regulator 5V to 3V from Linear Tech or Dallas/MAXIM
and another answer also if i cn convert from 5 to 3 volt then i could also convert from 12 to 5 also for cd rom as an audio cd drive to use an adaptor as a powr
I really felt very excited when I did my first experiment with computer
I Thout one thing more for that..
I can use the radio ar any device with USB's supply but the SPKs i have o connet sapratly or to the line iin of my sound card..
But is it possible to make the 2 data wires as the line in ore one of them.
I think it could be But i have to desing a circuit to change the audio analog signel to digital signal,, BUt how that i dont know. and also we have to built a software for the controlin..and even this i dont know But may be there is a software for controlin like these equipments.. Do any knows any of these software located on the web..
I i could pass it will be like one of my dreams come true..