Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: spykid99 on January 22, 2009, 08:07:26 AM

Title: PC to Radio interface
Post by: spykid99 on January 22, 2009, 08:07:26 AM

Hi
Im currently trying to interface a dissected walkie talkie that i have
I want it to send out a pre-recorded message from my speaker/headphone jack
I this possible and also i have two different walkie talkie types one runs on 49.860Mhz and the other on 145Mhz i think(because the marking is pointing towards a special switch box that has about 8 or so leads running in on one side and same on the other???
I want to transmit on the 145 Mhz one and and receive on the other one
Any help would be appreciated

Spykid99

Title: Re: PC to Radio interface
Post by: fuzzyt on January 22, 2009, 10:31:57 AM

Unfortunately the frequencies on your walkie talkies will have to match.  You won't be able to xmit at 145MHz and receive that signal on 49.86MHz.  Its like a FM radio, you dial in the frequency you want to listen to.  Otherwise you would have to listen to them all at the same time.  :)

Title: Re: PC to Radio interface
Post by: spykid99 on January 26, 2009, 01:21:36 AM

Hi Again

What i mean is can i change their crystals so they can communicate ???
Ive heard you can't

Spykid99

Title: Re: PC to Radio interface
Post by: Admin on February 02, 2009, 07:59:13 AM

It entirely depends on the rest of the circuitry attached to the crystal. Usually, no.