Here you will find info on how I made my lightning detector and how i upgraded it to include a PIC to display more info on an LCD screen. Below are links to pictures, my college report and my source code for the PIC.
MK1 Report (PDF)
MK2 Source Code* (WinRar)
MK2 Source Code V2* (WinRar)
*To open the source code you need mikroBASIC PRO. You can download it for free of there website. The only limit is the ROM size of the program you make. This does not effect the lightning detector program.
The only parts of circuits I used from MK1 was the lightning detector circuit, LED circuit and the Meter circuit. The rest was cut out. I started by adding in a 5v regulator which is needed by the PIC to get a stable voltage. The pulses output from the lightning detector part is then fed into the PIC on the interrupt pin. The LCD screen is connected up according to what I set in the source code. The rest of the info for connecting and LCD to a PIC can be found on many websites by googling around the internet and reading this online book which goes with mikroeBASIC http://www.mikroe.com/old/books/picbasicbook/00.htm.
Update: The new V2 source code has EEPROM function to save the data so if you have the power setup like me and you switch to battery you will find the data was lost but not now. To reset the data I added a button on the side to clear the EEPROM on start up so you cant restart the data while the detector is running