PIC 18F4550

[cabocan]

Hi , does anybody know a good programmer circuit I can build for programming my PIC18F4550 ?

[Teknotronix]

While not a circuit you can build, I use the PICKit 3 to program PIC's from the same family. Find it works very well and is relatively cheap.

[joelby]

Agreed. You can spend a lot of time building the perfect programmer, or just buy a PICkit 3! There's currently a 20% off promotion: http://microchiptechnology.wordpress.com/2012/01/17/20-discount-on-pickit/ .

They're very cheap for what they are, and it's a tool you'll be able to use for years.

[kripton2035]

there is also this one, clone, half the price shipped ...

http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=350526544131

[metalphreak]

You can build your own programmer using an 18F2550 (or an 18F4550) but the catch is you need to program it first

http://usbpicprog.org/

These are good if you just want to program chips (no debugging etc)

[cabocan]

Thanks guys.I will take a look at these.

[Zad]

If you have a parallel port on your PC: http://lmgtfy.com/?q=pic+parallel+port+programmer

Similar ones exist for the serial port too.