ELET 3132L - Lab #1

10. Other useful operations on this menu include Properties (this is how you change the voltage
on a battery or the frequency of a clock), Cut Copy Paste Delete can be used to copy selected
components (saves time from having to go all the way through the menu system) and Font
can be used to alter the size and appearance of text associated with the component.
11. After flipping the two diodes on the left, add the two resistors. Resistors are in the Basic
component group. Notice when you select RESISTOR there are two more drop down menus
at the top of the dialog box – one is labeled Filter and is used to show either ALL, Ω, kΩ, or
MΩ. You need to place a 4.7kΩ resistor so choose kΩ. The other drop down is for tolerance
– the default of 5% is fine for digital work. Put the two resistors on the schematic and rotate
them correctly.
12. Now you need a power source. Choose Place →Component… again then select Sources and
DC_Power to get a battery. Place it on the schematic then use the Properties item to change
the voltage from 12 to 5. (You can also double left click on 12 then type in 5 and Enter.)
13. Now you need to add two inputs to your circuit. In real life you could use switches but for
simulation we will hook up two clocks – one for each input – and run them at different
frequencies. That way we will generate all possible input patterns quickly. Choose
Place→Component… then Sources→SIGNAL_VOLTAGE→CLOCK_VOLTAGE to place
a clock generator. Add a second clock generator so you have one for each input.
14. You must change the frequency on one of the clock generators. You could left click then
right click then select Properties like you did with the battery. But there is a faster way. Just
double left click on the text you want to change – in this case the leftmost one. So put the
cursor arrow on top of the 1kHz frequency for the leftmost clock generator and double left
click. Type in 2 in the dialog box and click OK. At this point your schematic should look
something like:
Figure 5: Component Placement
ELET 3132L Experiment #1 4 of 25