simple 18F4550 LPT programmer

[iggyboy]

18f4550 programmer

I am building the ICD2 clone and I am using 18f4550 as a bridge to USB. Unfortunately I discovered that I do not have anything to program that particular mcu with. I found some sources, HW and SW that is supposed to work, but it doesn't. Actually I have found two sources and neither works.

I am now stuck with my proto ready and no way of uploading code to the 18F. Any ideas or links?:|

Edit:

One of my sources:

**broken link removed**

 

[folks]

lpt programmer

I used this JDM to program my ICD2 (16f877A and 18f4550) along with software WinPic800 and works OK.

all the diodes (ecepcion zeners) are 1n4148
Transistors are 2n2222

 

[nomad13]

18f4550 lpt

Try this link

https://www.oshonsoft.com/picprog.html

I'm having a problem uploading files so follow this link for all that you need.
There you can find the programmer diagram, software and more info.

18f4550 is supported

 

[iggyboy]

simple lpt programmer

Ok, people. No success. Tried LPT version, but have no ideas left right now. I do have a few questions tough:

Is CLOCK (ICSP) at a constant frequency or is it skewed?

Is it possible something interferes with my LPT port and messes up the whole deal?

Couldn't probram a single byte. Something is very very wrong.

F! :|