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Since the ADC is in the microprocessor I think I will avoid the 9V supply as I am guessing TL071 is rail-to-rail and can possibly destroy ADC in my microprocessor chip. I will first try with LM358 circuit you suggested on 5V supply and see where I can get. If that doesn't work out well I will...
I used the circuit above with 9V and got the mic to power a small speaker. The intent was not to use a speaker but to do signal conditioning for ATD.
I changed the gain to 44 and biased the positive terminal of OpAmp at 2.6 V. I can get a signal out now that on DC reading from multimeter is...
It seems the circuit is only providing output 200mv PK on loudest speech into microphone.
I guess the information on the microphone was wrong it is definitely not given anywhere near 50mV output. I tried with oscilloscope.
Anyone have an idea how to fix this? I tried putting another LM358 with...
Unfortunately the only IC OpAmps I was able to get were:
386N
358N
72ACP
74CN
Fortunately I can use 9V battery for PSU, so that helps.
I built this circuit which has 100gain, it is really noisy can hear sound but it is not clear. I doubt sampling such audio would be a good idea.
**broken link...
I have the following Microphone: CZ034GU
Sensitivity -47 +- 4dB
Low Impedance
Current Consumption 500uA
Standard Operation Voltage 1.5V
S/N ratio more than 58dB
**broken link removed**
I have seen that to get this to input into any amplifier it needs Vin connected to output pin with a resistor...
Well I need a board similar so I can practice the lab and final project at home before heading to the lab. Could you help me find a similar board. Which website sells at a good price, also which specs are key to match as much as possible.
I am taking a course on microprocessors and we have labs with the board PBMCUSLK.
This board is barely available and the processor we use 68HC12 is just on its way out in tech world from what I have been told. I heard the S12 version is quite similar. How can I find a board that will fulfill my...
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