Require Pic Programmer

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dayaaol

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i need a Pic programmer circuit to program PIC18F2550 to build the pickit2 clone already tried JDM version but unsuccess please post cirucits Thanks in advance
 

Hi,

If you have a parallel port this low cost design works.

Later version with 40 pin pcb also attached
 

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Dear friend tried this too nut unsuccess anyway thanks to your help

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Dear friend(wp100) tried this too but unsuccess is it works for you whats your system specification
Dear embpic and xpress is it working did you tried it and working for you??? whats your system specifications please reply am waiting for your answer thanks in advance
 

Hi,

That circuit is extremely well proven and used countless times.

I used it with Windows XP, as probably did most people when it was popular a few years ago.

When you say its not working in what way, hardware , software or both ?
 

dayaaol said:
Dear embpic and xpress is it working did you tried it and working for you??? whats your system specifications please reply am waiting for your answer thanks in advance
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Yes it works for me, i had tested it long back with my college old PC, having 512MB RAM and P4 Processor, with Windows Xp OS.
It will work for sure with higher versions like Windows 7.
Try it, this is very simple to build.
 

yes this JDM programmer working well and i am doing it on windows 7.
 

My system configuration is dual core processor with 3 gb ram and having both win xp and 7 os but all this programmers are not working well i have also checked with VIA 2 D motherboard but unsuccess any way i will this circuits too and post results lets see
and when ever i connect the programer the software (winpic800 and ic prog and picpgm) says unknown device tell me do i need to configure serial port in bios and in os and if yes whats the parameters and details
 



Would be surprised if it was your hardware with a Parallel programmer; however have read reports in this forum of problems when using the serial ports due some differences in the serial port design. (?)

JDM programmer can be very strange, some folk get them working no problem, others never can.

What about your programmer hardware, typical causes of problems ; are using a breadboard ? how long is the lead from the pc to the programmer board ? is it a proper shielded cable if more than a few centimeters long ? is the psu suitable ?

Did you try WinPic with my parallel board ?
 
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Do not connect DB9 or DB25 body to PCB earth or GND
 

yes am using breadboard and all the connections are well checked. for cable i am using 2 mtrs of ribbon cable(a cable with 10 colors. i have cut 5 colors for this)and whats the PSU specs please tell me
PA3040 i have used both connecting and not connecting but no results

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yes but shows unknown device
 

Can we see picture of your circuit?

Which software you are using

winpic800 more simple

which cct you are using

Does Hardware test "OK"
 
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Hi,

Not a chance !

1. do not use a breadboard for a programmer, it must be a tight soldered circuit, either strip board or pcb.

2. the pc to programmer cable should be a short as possible , if using a flat ribbon cable more than 150mm you risk corruption or loosing the signal all together.
If using a proper shielded parallel cable find one thats 1 meter long or less

3. What psu are you using , voltage and current ?
 

 

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