Hello everyone
I am trying to find out how to see a waveform by using a PC microphone jack. I do not need any timing or amplitude accuracy. I just need to see how the waveform looks like.
Need to monitor a pwm pin or Tx, Rx pins waveform using pc. I have already destroyed a couple of controllers, a few rf modules due to wrong connection. well this time I dont want to destroy my PC thats why I ask for your suggestion.
What is the maximum voltage the microphone jack can receive?
how to connect a pwm pin to PC ?
will connecting the PWM & GND pins directly to the mono jack be a problem? if yes, what to do?
You can't really do that directly because the audio input is only for ~20 KHz signals.
It also expects ~+/1.5V signals.
The stuff you want to look at can all easily exceed that.
What you need is a logic analyzer or USB oscilloscope.
This one works great and is only $150.
USB Oscilloscope, harder to make a recommendation on, there are so many.
This one looks pretty good
Thanks for the info. My PC will be safe now.
Now it seems a bit crazy to plug the pwm pin directly to the pc.
Thanks for the product links. Are there any way to make a simple usb oscilloscope out of scratches? I mean it would be really great.
Thanks again CrossRoads for your help.
