Happy Continuation !!

I having difficulty in determining the shape of signal or wave thur the digital and analog meters. Is it any one who have a meter to sell for $30.00 or cheaper.That perceive above human voice vibration to what ever hertz.I have often wonder how Graham Bell and the others in the remarkable era managed without Oscilloscopes. Just being curious when was the first Oscilloscope was use in a laboratory or invented ??

 

You can use the LINE INPUT of your sound card on your PC and any of the audio visualizer programs to serve as an oscilloscope, all for free.

 

Sparkfun have one as a kit for $29.95;

https://www.sparkfun.com/products/10140

Or you could go up in price to approx $60 and get a DSnano pocket sized oscilloscope.

 

A meter will give you amplitude but you can only assume what the circuit waveform looks like without an oscilloscope. The early experimenters simply modified their circuits until the output signal was what was desired. Likely a lot of trial and error involved. Here's a little oscilloscope history for you.

 

Sparkfun have one as a kit for $29.

https://www.sparkfun.com/products/10140

Or you could go up in price to approx $60 and get a DSnano pocket sized oscilloscope.

The above image is a frequency counter.I have one on my digital meter.Those scope that were shown are in $300 range,but its a good web site I did't know existed.The other suggestion is more appealing,that is DSNANO website.Must finish reading the reviews of likes and don't likes.Thanks a lot.

 

In response to a question in the original post:

An early way to visualize sound by Heinrich Rubens in 1905 and called a flame tube, it allows visualisation of standing waves.

YouTube demonstration:
http://www.youtube.com/watch?v=GZNYJIlYBUw#t=183

At about the same time this manometric capsule was also used to visualise sound.

YouTube demonstration:
http://www.youtube.com/watch?v=-gA7qq7Ja4U#t=49