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I have build the given one. But sensitive bit low when low audio input. I did change bit and now sensitive seems fine. Thank you.
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At the moment some of this resistors doesn't have with me. Once I find ,will make this too. Thank you sir.
Thank you very much sir. I'll make this one and will post the result.
**Is that resistor 10 M or 10 K from the input (Mic input) ?
** Can I use BC 547 (PNP) and BC557 (NPN) for the transistors?
** Is there any option to adjust sensitive?
If you can attach clear image really appreciate.
Thanks for the reply. But I couldn't find any solution for the leaking audio to power source. Finally decide to supply individual power supply (Rechargeable batteries) to each audio sensor circuit. Ohh.. God why this audio electronics become more difficult to me...:-(
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Level means sensor level. I mean if audio sensor can be more sensor (adding some transistor to amplify 1 stage), is good. Power source- Its 12V to 5 V regulated power supply. Whatever power source used its leaking audio to power source. I check with signal tracer...
I'm working for a design which light LED when its detect audio input to the circuit from a mobile phone. There are few same design doing the same thing. Detect audio and light LED is fine but the problem is Audio sensor circuit leaking audio to power source. I have check with Audio...
I'm a newbie and tried to dial a no from MCU (16F887) to Sony Erricsson K750i. With hyper terminal connected with data cable to pc it works AT commands fine.But I couldn't communicate SE750i with MCU. I have attached schematic I used (drawn by me) and the flowcode program that I used...
I need to dial mobile phone from PIC micro controller (Flowcode). I made simple Flowcode program and try to execute by R232 connection. But no luck. Here with I have attached the program and the PIC module made by me ( For testing needs). Please make correct me if I made any mistake for this and...
Sorry for my mistake. Wrongly placed transistor.
You know what ALERTLINKS it works .....................:grin::grin::grin:
Audio quality superb !!!!
With certain settings echo was 100 % eliminated. Thank you very much for this and I really appreciate. WIsh you a bright future.
Are you sure schematic does not short electricity. I stuck with some short circuit position. Pin 4 get +46.6 V. Transistor base has the same voltage without connecting GND to circuit.
Please have a look.