PicoScope 7 Software
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Can I connect microphone to PicoLog 1000
Can I connect microphone to PicoLog 1000
Hello,
I want to ask you if it's possible to connect a microphone to the PicoLog 1000?
It will be possible to see on graph when sound 1kHz will be near the mic?
I want to ask you if it's possible to connect a microphone to the PicoLog 1000?
It will be possible to see on graph when sound 1kHz will be near the mic?
Re: Can I connect microphone to PicoLog 1000
Hi encepence,
Yes you can. However Microphones typically have low level signal outputs, so, depending upon what type of microphone it is, you will probably need some form of signal conditioning amplifier or impedance matching transformer.
What type of Microphone is it (e.g. instrumentation or audio, and what sort of output does it produce)?
Regards,
Gerry
Yes you can. However Microphones typically have low level signal outputs, so, depending upon what type of microphone it is, you will probably need some form of signal conditioning amplifier or impedance matching transformer.
What type of Microphone is it (e.g. instrumentation or audio, and what sort of output does it produce)?
Regards,
Gerry
Gerry
Technical Specialist
Technical Specialist
Re: Can I connect microphone to PicoLog 1000
Hello,
Thank you for your answer. I have another question connected to this topic.
I have tried to connect microphone to PicoLog. Unfortunately I have forgotten about one important thing - output voltage from the microphone is alternating voltage. So the wave graph looks like this:
https://imgur.com/MFi4wpX
Measuring voltage is from 300mV to 1.5V
I'm using universal mic amplifier. Signal from the microphone is amplified and we have alternating voltage on output. I'm connecting output to C1 and GND on pico connecting board.
Mic amplifier looks like this: https://imgur.com/cNUgLdd
...and my problem is: I want to have a straight line in the chart, not going through 0V. How can I do it?
Thank you for your answer. I have another question connected to this topic.
I have tried to connect microphone to PicoLog. Unfortunately I have forgotten about one important thing - output voltage from the microphone is alternating voltage. So the wave graph looks like this:
https://imgur.com/MFi4wpX
Measuring voltage is from 300mV to 1.5V
I'm using universal mic amplifier. Signal from the microphone is amplified and we have alternating voltage on output. I'm connecting output to C1 and GND on pico connecting board.
Mic amplifier looks like this: https://imgur.com/cNUgLdd
...and my problem is: I want to have a straight line in the chart, not going through 0V. How can I do it?
Re: Can I connect microphone to PicoLog 1000
Hi encepence,
I assume that you mean you want all of the sinewave to have positive values (i.e. you want the waveform to be lifted just above 0 volts) in which case you need to amplify the microphone voltage so that the maximum will be greater than + or - 2.5V. You can then you can use the Small Terminal Board for the PicoLog 1000 series to offset and scale the voltage (see page 3 of the Small Terminal Board User Guide here: https://www.picotech.com/download/manua ... -guide.pdf) The voltage from the microphone amp can then be correctly captured with the maximum resolution of the data logger.
If you amplify the voltage to + or - 5V peak to peak then you can use the resistor values mentioned in the User Guide, otherwise you will need to calculate the resistor values from a set of equations which I can give you, and then select the appropriate values with appropriate resistor tolerances for the accuracy that you need.
Regards,
Gerry
I assume that you mean you want all of the sinewave to have positive values (i.e. you want the waveform to be lifted just above 0 volts) in which case you need to amplify the microphone voltage so that the maximum will be greater than + or - 2.5V. You can then you can use the Small Terminal Board for the PicoLog 1000 series to offset and scale the voltage (see page 3 of the Small Terminal Board User Guide here: https://www.picotech.com/download/manua ... -guide.pdf) The voltage from the microphone amp can then be correctly captured with the maximum resolution of the data logger.
If you amplify the voltage to + or - 5V peak to peak then you can use the resistor values mentioned in the User Guide, otherwise you will need to calculate the resistor values from a set of equations which I can give you, and then select the appropriate values with appropriate resistor tolerances for the accuracy that you need.
Regards,
Gerry
Gerry
Technical Specialist
Technical Specialist