How to draw PIC18F4550 and other hardware in computer

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hi, im looking for a software which allow me to draw my schematic circuit diagram and also can simulate. anyone knows which software can draw PIC and sensors,thermistor and many more hardware and allow me to design, simulate and draw by computer?

pls introduce to me if u know:grin:

thanks!

 

[ckshivaram]

use proteus software... it suits all your requirement

or there is alternate ISIS software..

 

[gaurav467]

PIC18F firmware and finally creating the Windows interface for the device which will allow you to control a LED from the PC and read the state of a push-button from the device.