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Please Help in finding out Components in Orcad Library.

Please Help in finding out Components in Orcad Library.

In Orcad Capture with Pspice I can't Find

1. ATMEGA8

2. Some components and Ports can't be recognized by me
They circled in the pic attached below

What is that J1,J2 and J3.
Please tell what to use for those other (GND,D-,D+,5V) Box ?

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Please help me to find out PIC16F877A in orcad library

akshayjadhav (author) 5 years ago
Thank a lot gmoon and caitlinsdad

And then I gave a try to it .....
Please can u Check and tell me if I am wrong any where
Please Do Check n reply
SSS.JPG
I've never used Orcad, but it must have a error checking function. Use that first...

Without checking each individual trace (sorry, dude ;-), I think there's conceptual error in the schematic. "Power functions" like +5V and GND usually need a "power component" symbol for 5V, and sometimes something like a "power flag" so the CAD system can differentiate the function.

Look around Orcad...maybe where you found the GND symbol.

You definitely don't need four different 5V batteries for that circuit. You need a 5V symbol, and (possibly) a power flag for where the voltage originates.

Note that the likely location of the battery is at V4--which is usually the place one would add the power flags, too. But the connectors also could be connected to a power supply. So either a single battery at that point, or some other power symbol--which will be substituted for either a battery connector, power socket or just two solder pads in the PCB generation phase.

Note that Orcad may automatically include a power flag (or the software equivalent) for all power symbols...
akshayjadhav (author)  gmoon5 years ago
Yes Thanks a Lot for such a long time you've spent on ur Key board for me :)
I'll surely try n use that !
gmoon5 years ago
Orcad / pspice works well for simulating generic components and ICs such as timers, TTL, CMOS, etc. But something as complex as a microcontroller, no.

Unless you're using it simply to trace a PCB--that might work. Search for other AVRs with the same footprint (Atmega168, 328, 88, etc), and if that doesn't work, use a generic PDIP-28 template. You won't need the exact chip for a trace.

CDad is right, J1 and J2 are jumpers.

The other two are either connectors, or they reference a different part of the schematic you don't have...
caitlinsdad5 years ago
Just an educated guess but is the left component the USB hookup and the right circled component a standard DB9 serial interface? J1.... are usually designations for jumpers, maybe their own symbol for it? Can you substitute any dip chip package with the same number of pins for your atmega?