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PSPICE SCHEMATICS NOT WORKING DRIVER
PSPICE SCHEMATICS NOT WORKING PC

The commands in the attributes window represents the value of the input at the corresponding time in the command before the space.

Double click on the dstm1 supply you connected in the circuit previously and set the input commands of the digital input system as shown in the figure below,

Next step is to set the attributes of the input digital supply.

If we are interested in checking the voltage on a specific wire in spite of checking it at a node, double click on the wire and inn the window that appear as a result, type the name of the wire you want to label it with, as shown in the figure below,.

Place it at the output capacitor and at the input node as shown in the figure below,.On the top of the schematic window, click on the Voltage/Level Marker button as shown in the figure below,.Connect all the components to complete the circuit diagram as shown in the figure below,.Click on the draw wire icon at the top bar of the schematic window in order to connect the already placed components for circuit designing, as shown in the figure below,.The placed components in the schematic window are shown in the figure below,.Next step is to place a ground, do the same again and in the part name type Dstm and select the digital source and then click on place & close as shown in the figure below,.Again open the get new part window and in the part name block type 7432, select the OR gate from the list given and then click on place & close as shown in the figure below.

Again open the get new part window and in the part name block type 7408, select the AND gate from the list given and then click on place & close as shown in the figure below.

From that list select a simple NOT gate as shown in the figure below,

In the get new part window, type ‘ 7404’ it will display a NOT gate available in PSPICE.

Click on the get new part icon at the top bar of the schematic window in order to search for the components that are needed for circuit designing.

After opening the new schematic before jumping into designing first save the schematic by clicking on the file button at the top left corner and then selecting save as so that we can access it anytime in the future.

From the design manager click on the run schematic button to open a new blank schematic as shown in the figure below,

PSPICE SCHEMATICS NOT WORKING PC

Open the PSPICE design manager on your PC by typing design manager in the search bar. an Exclusive OR circuit as we have discussed in the introduction part, and a few details of exclusive NOR is also provided and left as an exercise for the reader.

Lets’ design a simple digital circuit i.e.

A simple circuit diagram of an exclusive OR gate is shown in the figure below,Īnd the truth table of an exclusive OR and exclusive NOR gate for two inputs is given in the table below, A B XOR XNOR 0 0 0 1 0 1 1 0 1 0 1 0 1 1 0 1 Examples of simulating digital circuits using PSpice An exclusive OR circuit gives a true output if the number of true instances is odd and gives false otherwise. One of the circuit of digital systems is exclusive OR circuit. zeros and ones and in this tutorial we will work with the logical gates.

As we have discussed previously a computer can only manipulate digital or binary information i.e. Examples of simulating digital circuits using PSpice Introduction to digital circuitsĭigital systems are simply referred as the systems which are designed to store, process and communicate information in digital form.Remove the IC's and test manually using e.g. These would be my first target, since they are easily broken if a peripheral card is inserted or removed while the Apple by mistake is still powered. Next step is perhaps to check the function of bus drivers.

PSPICE SCHEMATICS NOT WORKING DRIVER

Remember that there can be several non-functional IC's on a non-working Apple (mine had one broken RAM IC and one broken bus driver IC). Is it black? Is it a random character pattern? Is it a fixed character pattern? Swap around the RAM IC's systematically and see if there is any change in the behavior. Try hooking up a monitor and see what it shows. Since the high-pitched noise suggests a short-circuit somewhere on the board, try removing one IC at a time (while Apple switched OFF of course!) and see if you can eliminate that condition. If the Apple is still not working, check all power supplied to the board while PSU still connected to board.

I'd suggest that you remove the disk controller card from your Apple II as a first step, since it could be the culprit.