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...)
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)
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)
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.