This is a Digital Oscilloscope, the type of electronic test instrument that allows observation of constantly varying signal voltages, usually as a two-dimensional graph of one or more electrical potential differences using the vertical or 'Y' axis, plotted as a function of time (horizontal or 'x' axis). Many signals, for example sound, can be converted to voltages and displayed this way. Signals are often periodic and repeat constantly, so that multiple samples of a signal which is actually varying with time are displayed as a steady picture.

To start; controls are as follows:
>press "on/stby"
>plug in some sort of current (preferably pcln ctype sprk) on each input
>toggle sensitivities (1-4)
>veiw measurements for levels of current from 1 being low and 4 high)
>try switching channels (1-4)... the display above the inputs indicates the present channel

Please give me new features to add.

Features to add:
-Calibration
-control panel

>simple version

I added a few more directions. I hope they help.

For a more detailed diagram, go to:
http://en.m.wikipedia.org/wiki/File:WTPC_Oscilloscope-1.jpg

I have just released a simpler version for ease of use.