in this project I want to show you how to make an easy and cheap USB Oscilloscope.
Resolution: 16 Bit
Voltage range: +-7V / with probe +-70V
Signal generator: Sine, Square, Triangular and Sawtooth 0-20000Hz
Step 1: Material list!
What do you need:
An USB Sound Card (10-15$ on Ebay/Amazone, http://goo.gl/mV3fiC ) Important LineIn / Stereo Microphone!!!
A Case 70x70x55mm
4 banana jacks
2 BNC sockets
2x 18KOhm Resistor
2x 180KOhm Resistor
and some solder
I am using Soundcard Oscilloscope by Christian Zeitnitz:
Step 2: Preparing Resistors/Box
In this step we will prepare the resistors, and the Box
With the Resistors we want to make two ten to one voltage divider (one for each channel)
Then we will Connect the Divided side to one of the jacks, and the other side will be the booth channels of our Oscilloscope.
I used the luster terminals to connect the resistors.
Just add the BNC and the banana jack how you want... Dont forget to drill a hole for the outputt wire!
Step 3: Signal generator
For the signal generator, we will just use the seccond Jack.
Connect the GND of the Jack with two of the Banana Jacks, i prefer black for it.
Now connect one of the other two pins to the first red banana jack and the other pin to the other red banana jack.
Step 4: Put it together
Now we will put it together,
there is nothing mutch to say, just install the sockets in the box solder them to the resistors and to the Jacks.
I put the jacks with cable ties together, so they fit to the Soundcard.
Then plug it into the soundcard, signal generator plug to soundcard output and Oscilloscope to LineIn /Mikrophone
(!!! Don´T confuse Signal Generator and Oscilloscope !!!)