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myDigital™ Board Reference Manual
Revised November 14, 2014
This manual applies to the myDigital rev. A
DOC#: 6002-502-006
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 1 of 2
Overview
The Digilent myDigital accessory board for the NI myDAQ is designed to work in conjunction with myDAQ to
provide students a cost-effective, portable, and engaging platform for teaching electronics. Along with NI Multisim,
the myDigital and myDAQ provide everything needed to allow students to design, construct, and test basic analog
and digital designs.
1 Using myDigital
NI myDAQ provides power (+5 VDC and ±15 VDC) along with eight configurable digital I/O pins, two analog inputs,
and two analog outputs. All of these signals are available to the myDigital at the first two signal blocks at the top of
the breadboard when plugged into the MSP connector. Refer to the NI myDAQ User Guide and Specifications for
detailed specifications on these inputs/outputs. NI myDAQ includes software for using these inputs/outputs for
signal generation and measurement, including a two-channel oscilloscope, voltmeter, function generator, digital
pattern generator, and more. Separate banana jacks on myDAQ connect to the DMM and allow for accurate
measurement of resistance, current, and voltage. All I/O on NI myDAQ is also programmable using LabVIEW™,
making it easy to create custom instruments or student projects that incorporate graphical user interfaces.
Digilent myDigital board.
Power supply connector for stand-alone use.
NI myDAQ miniSystem port connector.
Breadboard area.
Seven-segment LED displays.
Buttons (momentary switches).
Slide switches.
Discrete LEDs.
Onboard power regulator.
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 2 of 2
2 Power Supply
The myDigital can be powered from the myDAQ or power can be brought onto the breadboard through the
external power jack. The connector is a standard coaxial power connector (5.5 mm × 2.1 mm) commonly available
on DC wall adapters (17 VDC max). An onboard regulator supplies fixed 3.3 or 5 VDC (jumper configurable) from
this external power. Both the raw external power and the regulated power are available at the terminal block
(Vext and Vreg).
3 Switches and Displays
3.1 Switches
Switches S0 through S3 are slide switches that provide +5 V (1) at the respective terminal block contacts when in
the ON position and GND (0) when in the OFF position. Current limited with 200 Ω series resistor.
3.2 Buttons
Buttons B0 through B3 are push-button switches that provide +5 V (1) at the respective terminal block contacts
when pushed and GND when released. Current limited with 200 Ω series resistor.
3.3
Discrete LEDs
Individual LED indicators arranged to create three configurations: two "traffic light" style patterns (R1, Y3, G1 and
R0, Y1, G0), a horizontal series of a single color (Y3, Y2, Y1, Y0), and a "die" pattern (R1, Y3, G1, Y2, R0, Y1, G0).
LEDs can be energized by connecting their terminal block contacts to +5 V (current limiting is built into the board).
3.4
Discrete LEDs
The myDigital has two standard seven-segment displays with direct access to each LED segment (A through G). Use
DIG0 and DIG1 terminals to select which digit is enabled by connecting that signal to GND (0) (normally pulled-up
or disabled). Connect DISP1 terminals (A through G) high (+5 V) to turn segment ON. Both displays can be used by
rapidly alternating between digits.