interface handphone to at89c51/52

take a look at this schematic, I used this to connect a mobile headset's speaker o/p to the controller.
adjust POT to get a nominal current value.

I used this configuration for DTMF reception. I dont know for what purpose you need it.
... Read Compelte post
Other Tags: mobile headset   nominal current   dtmf   current value   i dont know   
Posted by ajay_bhargav on Fri Apr 27 2007, 03:08 am

Downloads

Comments

Clydehet
Wed May 01 2024, 06:44 pm
Davidoried
Wed May 01 2024, 06:11 pm
KevinTab
Sun Apr 28 2024, 05:35 am
Tumergix
Sun Apr 28 2024, 12:59 am
StevenDrulk
Sat Apr 27 2024, 08:47 pm
StephenHauct
Sat Apr 27 2024, 09:38 am
Adamsaf
Sat Apr 27 2024, 07:12 am
Robertphype
Sat Apr 27 2024, 12:23 am