Microphone circuit

[SD MUKARRAM ALI HUSSAINI]

I want to make a microphone circuit which is able to transduce audio signal into electrical signal.

 

[SD MUKARRAM ALI HUSSAINI]

I Want to make a walki-talki . Does anybody has idea of a circuirt

 

[nnb29]

can i make mobile charger using my idea of circuit of electret microphone ???sound pulses coming from any instrument will get converted into electrical signal...as mobile charger requires 5-6 V DC supply...(pls correct me if i'm wrong...as i told in my 1st post,i'm beginner student of electronics...)

 

[Hero999]

No, I told you that you can't do that at the start of the thread, you should pay more attention.
https://www.electro-tech-online.com/threads/microphone-circuit.96257/#post776261

 

[nnb29]

ok my last query:in my attached document, by varying R1,R2 can i obtain required output???in given circuit graph,it is giving high and almost same gain between 100Hz-50KHz...(human hearing range;20 Hz-20KHz)

**broken link removed**

 

[Nigel Goodwin]

ok my last query:in my attached document, by varying R1,R2 can i obtain required output???in given circuit graph,it is giving high and almost same gain between 100Hz-50KHz...(human hearing range;20 Hz-20KHz)

Varying them will change the gain - but it really depends what your 'required output' is.

 

[audioguru]

I want to make a microphone circuit which is able to transduce audio signal into electrical signal.

The output of a microphone is an electrical signal when it hears sounds.
Why do you want a circuit? To do what?

 

[nnb29]

Varying them will change the gain - but it really depends what your 'required output' is.

As I told in previous posts,by varying R1 and R2 can i obtain 5-6 volt?????

 

[blueroomelectronics]

Why do you want 5-6 volts? What current? What is it for?

 

[nnb29]

Why do you want 5-6 volts? What current? What is it for?

**broken link removed**
i want 5-6 dc volt to charge battery....is it possible to obtain by varying R1 and R2 in my attachment???

 

[audioguru]

The battery needs a DC current to charge it.
But the output of the mic preamp is an AC signal with its current too low.

Instead of rectifying and boosting the output current of the mic preamp then simply use the preamp's power supply to charge the other battery.

 

[blueroomelectronics]

Not enough energy in your voice to charge a 6V battery. Use a solar panel or hand crank generator.

 

[nnb29]

The battery needs a DC current to charge it.
But the output of the mic preamp is an AC signal with its current too low.

Instead of rectifying and boosting the output current of the mic preamp then simply use the preamp's power supply to charge the other battery.

Can u pls tell me in details what u want to say???

 

[Nigel Goodwin]

Can u pls tell me in details what u want to say???

Use the battery that's powering the preamp to charge your other battery, a microphone has nothing to do with it.

 

[audioguru]

Maybe he wants the preamp to charge the battery for the preamp. Impossible.

 

[nnb29]

after doing some improvement in my attached circuit...is it possible what i want to do????if yes pls suggest modifications...

 

[audioguru]

A microphone preamp circuit is completely different to a battery charger circuit.

 

[blueroomelectronics]

after doing some improvement in my attached circuit...is it possible what i want to do????if yes pls suggest modifications...

In a word "no". How long did you plan on yelling into the mike? If the idea was practical they would have built it into phones.

 

[nnb29]

OK,thank u for clearing my doubts...

 

[marcbarker]

**broken link removed**
i want 5-6 dc volt to charge battery....is it possible to obtain by varying R1 and R2 in my attachment???

Do you want to use this 9 V -powered microphone amplifier circuit to source a "voltage" of 5-6 VDC? I presume this "9V" you power the circuit comes from a 9V battery?


Whatever... I understand you believe it is what you need to charge a battery. OK. If so, I'd say replace the lower 47 k resistorwith a 100 K, then remove the 10 uF capacitor. You will then find 5 - 6 V DC on the output.

If I were you, I'd put a piece of tape over the microphone (or better still remove it completely), because any sound wave in the room is going to disrupt the DC output voltage.

Best of luck!