The main GUI of expEYES Junior is an audio range  4-channel Digital Storage Oscilloscope, with several extra functions. An oscilloscope displays voltage as a function of time and it is a very useful tool for to study electrical and electronic circuits. An example screen is shown below. The EXPERIMENTS button provides a popup menu of programs required for various experiments.

Videos on using the GUI:   video1

The main features of CRO+ are:

ATR -- Analog Trigger, the trace starts when the voltage is at the selected trigger level.
WHI -- Wait for HIGH on  the selected input
WLO -- Wait for LOW on  the selected input
WRE -- Wait for Rising Edge on  the selected input
WFE -- Wait for Falling Edge on  the selected input

SHI -- Set HIGH on the selected Digital Output (OD1 or CCS)
SLO -- Set LOW on the selected Digital Output (OD1 or CCS)
HTP -- High True Pulse (0V-5V-0V) on the selected Digital Output (OD1 or CCS)
LTP -- Low True Pulse (5V-0V-5V) on the selected Digital Output (OD1 or CCS)