Use Matlab to get a dc voltage through microphone jack

Question

0 个投票

Hello,

I have a photoresistor that basically will output between 0 and 1V and I connected it to a microphone jack. Now I wanted to know the value of that voltage.

It doesn't need to be very precise, all I need is to distinguish between shadow and sun. Also, it doesn't need to be continuously, it's only for a short period from time to time.

Using, for instance, the daqscope, i can't see the dc signal, i can only see waves if I move in front of the photoresistor quickly.

Can anyone help me??

Thanks!!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Follow Question

Answer 1

Rushikesh Tade 2015-2-21

0 个投票

see if this one helps : Real Time Microphone and Camera data acquisition and audio-video processing

I have not tried it but in description it is written that it can plot amplitude values of Audio.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Miguel Lopes 2015-2-21

Thanks for the help, but I think what I want is impossible, not due to Matlab limitations, but because the sound card in computers has a high pass filter, which doesn't allow any dc signal to go through. I found it out yesterday, so I hope this helps anyone with the same problem as me.

请先登录，再进行评论。

Use Matlab to get a dc voltage through microphone jack

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

社区

类别

标签

Community Treasure Hunt

Use Matlab to get a dc voltage through microphone jack

0 个评论 显示 -2更早的评论 隐藏 -2更早的评论

回答（1 个）

1 个评论 显示 -1更早的评论 隐藏 -1更早的评论

社区

类别

标签

另请参阅

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

1 个评论
显示 -1更早的评论隐藏 -1更早的评论