A few files for the PE4302 Variable attenuator controller project, the PE4302 is available built from ebay this project is to control it File:PE4302 Attenuator.pdf File:PE4302 LCD Schematic V1.1.pdf File:PE4302 LCD template.pdf File:PE4302 Schematic Vero 3V3 v11.pdf File:PE4302 Schematic Vero 5V v11.pdf File:PE4302 LCD PARTS.xls
The .hex file for people to download is here File:PE4302 Serial Controller V4.HEX
Below is a view of the lid removed to show DIP switches 1 and 2 are turned off, solder removed from pads J5 and J6 and added to J4 to ready the attenuator for serial control with the above project. Photo :- G4KLB
Old versions of the MPLAB IDE software are best for simply loading a .hex file on a device [V8.91 of the MPLAB IDE is a disaster]. Look for v3.00 or v3.35. Download and install one of these and use the IPE following the steps in Bas' video.