PIC18F2550 & Ludipipo Programmer

[liyin]

Is this PIC programmer capable of programming a brand new PIC18F2550?

My serial port provides close to 12V.

 

[wp100]

Hi,

Well its not down to just that circuit, it also depends on the type of serial port your pc has and the program to run it.

Some folk can get those jdms to work for them, many others like me cannot.

Assume you are trying to program the 2550 to make a pk2 clone ?

 

[liyin]

I was able to program a PIC12F629 with a very simple JDM-type circuit I made on a breadboard, and ICProg.

I'm asking for your input because online orders for parts can take weeks, so I wanted to narrow down my search for a simple programmer for the PIC18F2550.

I want to make an IR Toy.

 

[wp100]

Hi,

Well that sounds good if you have already programmed a chip ok, though it might be worthwhile if someone else who has used the same programmer can verify it works with a 2550 ok.


Although icprog does not list the 2550 it should program fine using the 4550 which is identical from a memory point of view.
Have done it myself on the older paralllel port programmers.

If you can program a 2550 then suggest you make yourself one of the Pickit2 Lite clones as detailed in this forum.
They are very cheap, usb , use Microchips software, work better than anything else like it, and cover virtually all the Pics

 

[liyin]

I'm going to try this updated JDM2 PIC Programmer.

I've programmed everything from an 8 pin 12F629 to a new 18F4550 USB PIC

JDM2 Based PIC Programmer
https://www.instructables.com/id/JDM2-based-PIC-Programmer/

 

[MustaineV]

is there anywhere that teaches how to interpret circuit diagrams? (apart from college )

 

[liyin]

JDM2 Based PIC Programmer

 

[MustaineV]

JDM2 Based PIC Programmer

My *** man, that is SUPERB. What is that called? A Breadboard diagram?
Also, what are the labels up top? (G, Vpp, 3, then Vas5, 7&C etc..) ?

 

[liyin]

Image Labels (in order)

G / Vpp / 3 / Vdd & 5 / 7 & C / D / 8 / 4

Numbers represent serial port pins, letters are abbreviations for ICSP pins.

ICSP (SV1) Pins (from Schematic 1)

1) DATA = D (in image label)
2) CLK = C (in image label)
3) GND = G (in image label)
4) VDD
5) VPP

Breadboards connections are not very trustworthy, I'd recommend buying the PICkit 2 programmer, it also works as a Logic and UART tool.

Below are the best schematics I could find for the JDM2-based PIC programmer. Schematic 2 could help in visualizing how it connects to a PIC18F microcontroller.