digitally tuned radio

Forum 2005-2010 (read only) Hardware Interfacing
#1

hi all,

this is something I've been trying to work out for a while but I'm hitting a brick wall so any help would be appreciated.

I'm trying to tune an FM radio according to a predetermined music 'score'. My first port of call was a mechanical set up with a variable capcitor hooked up to a stepper or servo, this prooved not to be satisfactory however.

I'm now trying to work out a way of electronically controlling the tuning, would this be done with a vco? would i be able to get the level of control i need?

any help would be greatly appreciated

owen.

#2

Hi Owen, have a look at varicap diodes. These are commonly used for electronic tuning in fm radios

#3