How to connect an active mixer to a mobile phone.

Status
Not open for further replies.
R

Riaandk

Newbie level 2
Joined
Dec 6, 2013
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Visit site
Activity points
12
I build a small mixer circuit from, Electronic Projects for Video Enthusiasts, and i want to plug its output into a Nokia 1200 mobile phone. If I connect the mixer output to a bench amp it works very well, but if i connect it to the headset mic, it is very soft. Any ideas, please.
 

Attachments

  • Mobile Mixer.png
    41.9 KB · Views: 110

The opamp has a voltage gain of 68k/47k= 1.45 times which is not much gain. Its output is capacitor-coupled to an attenuator made with a 10k resistor feeding a 1k resistor so its output is 1/11th the level at the output labelled "To Amp". Try connecting the output labelled "To Amp" to the mic input of your phone.
 
Thanx Audioguru, I followed your advice and it worked.
Regards
Riaan
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…