|Home > Circuits > Sound/Radio > Microphone Mixer|
|Anatoly I. Shikhatov||198,131||20||25|
|This relatively simple mixer was designed for three dynamic microphones, but can be re-designed for more or less. Level and tone controls are available to tailor the sound to your needs.|
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|Anyone know the noise floor could below 2uV(-115dBV) A-weighting?|
|Thanks, I build this circuit and it work fine.|
|1.For questioner on Friday, February 12, 2010, look at schematic, that clearly shows + and minus 9v. 2.For shoaib, follow the instruction, IE use 2 9v batt, eliminating MAX error, Feed in 1Khz signal (or music) at uV to 1 volt and lisen or look with oscope at U1 pin6, R8 and then u2 pin 6 to check for signal stopage. Generate signal with pot or volt divider from strong source. 3.Bill, look harder, it is also 0.022 uF or microfarad. Do not substitute much, IE 20 uF or 24uF as it will likeley not work well. 4.For Sunday, January 06, 2008 question, you can not use 386 but you can use TL071 which will work down to less than 8 volts. Put 2 10k resistors (in series) accross batt and make the center of them the ground of the circuit (making 2 4.5v "supplies). It will not have much head room. 5. balu, as above, you can use TL071 and use the Batt supply to test if the hum is from your power supply. Enclose it is metal case, make all wiring close, use a shielded cable to the mic. Increase size of C1,2,5,6, add a 5 or 10uF to each batt to ground(watch polarity, + to +).|
|this circuit is nice, but do TL0712 works like the 741 OP AMP? what are the characteristics of TL072?|
|When you say 2 9v batteries, do you mean in series or in parallel? Does that mean the circuit needs 18'v?|
|ok this is nice and these are helpng me to know aboutr electroncs so a heartiest thanks to u.|
|i complete circuit & cheak out many time but my circuit not work i use the max1044 ic for 9v+ 9v- supply what i do help any one plz|
|usE TL072 op instead of 741|
|I can't find the two 22nf capacitors. can I substitute them with another value?|
|nice guys. keep the good work on. I need more of audio electronics circuit|
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