Velleman VMA501, User Manual, Page: 23 / 31

VMA501
V. 02 – 05/04/2019 23 ©Velleman nv
Connection
Programming Code
This is an example of how to drive a 7-segment LED display without the use of current limiting resistors.
This technique is very common but requires some knowledge of electronics – you do run the risk of dumping
too much current through the segments and burning out parts of the display. If you use the stock code you
should be ok, but be careful editing the brightness values.
This code should work with all colours (red, blue, yellow, green) but the brightness will vary from one colour to
the next because the forward voltage drop of each colour is different. This code was written and calibrated for
the red colour.