headphone amplifier with microphone input

MrDEB

Well-Known Member

• Yesterday at 8:38 AM

• #21

see if this works

TDA2822M / D2822A / KA2209 DIY Guide - Simple low power stereo amplifier

DIY Electronics Audio TDA2822M - Simple low power stereo amplifier

electro-dan.co.uk

 

MrDEB

Well-Known Member

• Yesterday at 9:17 AM

• #22

revised schematic for bass boost

 

Attachments

• bass boost.png

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AnalogKid

Well-Known Member

Most Helpful Member

• Yesterday at 9:59 AM

• #23

MrDEB said:

not sure what is going on with link?
I bookmarked the page.

Click to expand...

A bookmark is a local shortcut, not the actual file. As you can see from the "C:" in the link you posted, the file is located on your hard drive.

If you are trying to post a document such as a datasheet or app note, find it on the web and post the URL.

ak

 

MrDEB

Well-Known Member

• Yesterday at 10:04 AM

• #24

post#21 works

 

MrDEB

Well-Known Member

• Today at 9:49 AM

• #25

Well after looking for parts I located the TDA2822 CHIP so decided to build the circuit in post#22
I ordered two different microphones

Dynamic Receiver 150Ω 60mV

Dynamic Receiver 150Ω 60mV

www.taydaelectronics.com

CONDENSER MICROPHONE 1.5K OHM 1.5V

CONDENSER MICROPHONE 1.5K OHM 1.5V

www.taydaelectronics.com

hopefully either one will work
Awaiting the VELLMAN kit then compare results against circuit in post#22