Programming instructions

Source Components
Multisim Component Reference Guide 1-2 ni.com
1.2 Digital Ground
The digital ground is used to ground digital components which do not have an explicit ground
pin. The digital ground must be placed on the schematic but does not need to be connected
directly to any component.
Tip If you are unsure of the ground required for a digital component that has its ground pin
hidden, double-click on the component and click on the
Pins tab. Locate GND in the
Name column and move across to the Net column. In most cases, the name of the net will
be GND.
The default Reference Designator (RefDes) for the digital ground is GND. When you connect
a wire to a digital ground, the wire’s net name will be the same as the digital ground’s RefDes.
Multiple instances of a digital ground may be placed on a schematic but there will only be one
matching net in the schematic.
If you rename a digital ground by changing its RefDes, and there are other instances of the
digital ground with the same RefDes on the schematic, you will be prompted to confirm that
you want to change all instances of the RefDes. If you select No, only the RefDes for the
selected digital ground will change. Remember that if a digital ground’s RefDes is changed,
the net name of any wires attached to it will change to match the new RefDes. For a more
detailed discussion, see “Global Nets” in the Multisim User Guide, or the Multisim helpfile.
 To change the RefDes of a digital ground:
1. Double-click on the component to display its properties dialog box, and click on the
Label
tab.
2. Change the entry in the
RefDes field and click OK to close the dialog box.
1.3 DC Voltage Source (Battery)
Battery Background Information
A battery may be a single electrochemical cell or a number of electrochemical cells wired in
series. It is used to provide a direct source of voltage and/or current.
ComponentRef.book Page 2 Thursday, December 7, 2006 10:12 AM