hello, i may have trouble explaining my problem to you since i am new to electronics, and english, but the images may help. i did this project of a spy mic using the lm324 amplifier, i took the schematic from afrotechmods, and it works. what i wanted to do was modify this circuit in such a way that instead of letting us listen to the voices around us at that time, i wanted to make it work on a phone, so i could record the audio in my phone, the original circuit diagram is attached. i also added my modified diagram. i just want to know if it will work, and i wont end up damaging my phone. what should i do to make this work right? the ''speakers'' in the original diagram are just earphones, no high power speakers. any help will be appreciated, thanks

 

The diodes in series to the jack should be from jack input to ground,
rather than in series. They are there to protect the phone.

You will have to experiment with levels and bias at phone input to
avoid clipping and distortion.

Regards, Dana.

 

The diodes in series to the jack should be from jack input to ground,
rather than in series. They are there to protect the phone.

You will have to experiment with levels and bias at phone input to
avoid clipping and distortion.

Regards, Dana.

avoiding damage to my phone is my main concern, then i can do everything else like experimenting with levels and bias, thanks

 

I don't think you will need an amp if connecting to the mic input of the phone. You can try this modified version of your schematic.
SG

 

I don't think you will need an amp if connecting to the mic input of the phone. You can try this modified version of your schematic.
SG
View attachment 150327

You are the phone itself not only having its own amplifier but also you can amplify sound using software level...all u need is a working mic. just stick it onto the phone jack make sure the connection to the jack is the correct one...not to connect it to the earphone line instead but the mic line

 

I don't think you will need an amp if connecting to the mic input of the phone. You can try this modified version of your schematic.
SG
View attachment 150327

you are right, i may not need the amplifier after all. thanks for the new schematic