JDM programmer: an easy to build tool for PICs

[galilu]

rdm programer

hi
Thanks alot for your help, I'm actual have some problem with English...but for Japanese, Indian & Chines is a BIG trouble 8O ...I will try to extract information from it... 8)

The 3rd link "http://www.jdm.homepage.dk/newpic.htm" which is acutely I found before not work with me...I don't know why ?, may be do you poor program supplied in JDM web-site(In my opinion). I hope I can find another software to do this job...

Anyway, Thanks

 

[sda]

how jdm programmer work

You can read the eeprom 2 ways, one is by programming a loader on your pic which reads the eeprom via the pic (if the PIC is code protected then you can forget about a working smart card again), the other is by reading it directly with the jdm programmer. Four connections are needed. Clock,data and power. The only software I recall that does eeproms with the JDM was the PIX software (PIX113).

Reading a code protected 16F84 is possible, but you'll probably need 3-4 chips, as "busting" them usually finishes with corrupt data, meaning that with the contents of 3-4 chips, and a bit of imagination you can reconstuct a good file.

Cheers
sda

 

[mbyka]

18f2550 jdm programmer

search in here ''Vp-20 Programmer''

it can programmabble all smart cards

 

[volta]

jdm programmer

Nearly every f series PIC uses the following inetrface

- RB6 (CLK) - DATACLK
- RB7 (DATA) - DATA
- VPP/RST - +12 - 14 V during programming

hepresto you can make an adapter for every kind of pic

 

[galilu]

programador jdm 18f2550

Hi

Thanks all, the ''Vp-20 Programmer'' is beautiful solution,I'm work on it now....

But if any one use JDM programer...when i connect the circuit without PIC, the program detect the circuit. But when PIC is on board it can't be detect at all.... . I try hard to find the problem, but I failed to let it work.I make all possible check for circuit connection, they all perfect as well as voltages upon zener...please someone give me answer?

Thanks again

 

[sda]

pcb jdm programmer

It should be the usual case of the com port not being able to supply the necassary voltage to power up the JDM interface.
I assume that the host PC is a notebook, as they supply max -+5v on the comport, and barely enough for the chip to go into programming mode
A home PC should be ok.


Cheers
sda

 

[galilu]

jdm programer xp

Hi sda

actually I use Home PC for that (old one )but when I read your comment, I change the PC...surprise 8O It works , Although it has verify error but its work....thats good.I will get it work correctly soon, may be by use extra pull-up resistance and MAX chip

Thanks for your sharp idea..... :wink:

 

[bitbaby]

jdm programer

t worked ! thank a lot!

 

[shahrol_hisham]

jdm programmer notebook

i have build ajdm programmer for pic 16f84 but when i try it under windows xp the circuit didnt work can any budy help me.....

 

[barrybear]

jdm programmer eagle

I have built 2 of these programers now . The first one worked on 2 PCs win 98 + ME and the second one I built worked ,just on a very old PC win 95. The problem was geting the program voltage high enough( +12v).

Reduce the size of the 2 caps and the feed resistor to lift the program voltage a little. double cheque your component values and oreantation and take off any led`s on the programing volts line.

good luck

Barrybear

 

[beret-ttc]

jdm programer 18f4550

hi im very new to this so i dont know where to post this im looking for a schematic on a eeprom programmer or any site that may sell one thx 4 any infos :?:

 

[mip]

jdm 18f

hi im very new to this so i dont know where to post this im looking for a schematic on a eeprom programmer or any site that may sell one thx 4 any infos :?:

Try PonyProg - very easy to build and supports a quite large range of devices.

 

[pasanRobotics]

information jdm programing

I programed 18F2550 ( 28pin DIP ) today, using dirt cheap JDM.

Follow below table.

I took that info from here http://freenet-homepage.de/dl4yhf/winpic/index.htm#adapt_18F2x5x

Good Luck

 

[bushygs]

Re: JDM programmer

I am using JDM Programmer 2, I was able to write and read programme for 16F84A, however when I tried to write data to 16F873A it failed. Using the same PIC I had got it written through paid service and. when the same pic is used in the JDM I was able to read but not able to write or erase the device is not code protected.
The JDM programmer 2 I used is given in the attachment
Any one pls help
:!:

 

[Kripton2035]

JDM programmer

often laptop computers dont have enought power throught rs232 to write pics throught jdm programmers. try with a desktop computer, or build an icd2 clone ...

 

[pasanRobotics]

Re: JDM programmer

often laptop computers dont have enought power throught rs232 to write pics throught jdm programmers. try with a desktop computer, or build an icd2 clone ...

Why dont you try it with external power source.