Telephone Handset Microphone

Step 4 Debug.

Put in a battery. Plug in a phone handset. Connect it with an audio cable to a speaker and make sure it works (don't forget that the toggle switch might be in the off position).

If it does not work, check your wiring. Make sure the connections are good and the connections are right. If both of those are good, then check to see if your phone handset works and looks like the one shown below. If you still can't figure out the problem then put in a new battery. If that is a no go, check to see if your speaker is turned on, the volume is up and you plugged the mic in to the right jack. If none of that works, you may have an audio device that requires a 1.2V line-level input. Try using a different audio device or see Step 8. If you have tried everything and you still can not get it to work, get someone else to do it for you.

Comments

[oatmealfight]

Hey there, I really like your project! I seem to be picking up an FM signal along with my voice. Did this happen to you? What can I do about it?

[team_nes_1986]

If you're getting FM signals, a temporary solution is to touch the ground connections. You won't get shocked, trust me. However, if you're running your circuit on something higher than 12 volts, then ignore what I just said.

[randofo]

errrr.... nope. Try checking your solder connections to see if any of the connections might accidentally be touching. It's hard to tell what the problem might be without being able to see it.