Build your own intercom or walkie talkie out of two old cordless phones

Step 3 Cut, strip and solder

Cut the red wire in the middle. You now have two red wires. Strip the ends of both red wires. Now you will need some basic soldering skills for the rest of this project.

This sight has some good tips if your new:
http://www.makezine.com/blog/archive/2006/04/how_to_solder_resources.html?CMP=OTC-0D6B48984890

Now solder one side of the resistor to one end of the red wire. Solder the other end of the resistor to one end of the 9 volt connector( it doesn t matter witch end). And the last side of the 9 volt connector will connect to the other red wire. It should look something like this. Now when you do this cut off exess wires from your resistor and 9 volt connector before you solder, remember it all has to fit back into the coupler when your done.

Note: int the photo I cut the yellow and black wires because they got in the way.

Note I also used 265 ohm resistor, because it was more handy. I have completed this project much earlier with out any resistor. Be careful if you do this, I am not sure what the implications are.

Comments

[vicvaneyck]

So the resistor isn't really needed? What can go wrong when you don't use it? And when you use cordless phones, do they still need to be plugged into electricity?

[tristantech]

The resistor may not be required for wall-powered cordless phones, but are mandatory for other phones. Use the resistor!

[luck]

I can answer your qeustion about the cordless phone u would still need to plug them in for the wireless part to work

[Gamernotnerd]

Yes they have to be plugged in