-------------------------------------------------------------------------------- I have made a JDM progammer and now tryinig to test it by the following steps which I got from: [www.reprap.org] THESE ARE THE TESTING STEPS: If you're using Windows and ic-prog (which I'm using!), then go to Settings | Hardware Check. Plug in the programmer and leave the IC socket empty. You should observe the following: 1 Using a multimeter, measure the voltage on the IC socket between pin 5 (-) and pin 14 (+). It should be just below 5V. 2 When you tick Enable Data Out, the Data In checkbox should also become ticked (and vice versa). You cannot directly tick the Data In checkbox. 3 Measure the voltage between pin 5 (-) and pin 13 (+). It should read around -2V to -2.5V. When you tick the Enable Data Out checkbox, it should swing to 4.5V to 5V. 4 Measure the voltage between pin 5 (-) and pin 12 (+). Tick the Enable Clock box and it should go to +5V (or a little more). Untick it and it should return to 0V (actually about -0.5V to -0.8V). 5 Measure the voltage between pin 5 (-) and pin 4 (+). Tick the Enable MCLR box and it should go to +12V. Untick it and it should return to 0V (actually about -0.5V). The thired step, bolded letters is what I am getting as +3.15V which should be -2V to -2.5V, after that every thing is right, I mean every thing except this bolded letters only not the whole steps!! PLEASE HELP ME!! I used 100uF/63V insted of 40V and 22uF/25V insted of 16V but I don't think that can cause problem or can it? (Exact values of capacitor voltage is not available!) Give me schematic if I need to make some interface, I'm a layman. Please don't just tell me to search over net, I'm tired of that (from last two weeks I'm trying to fix this) and now I want to concentrate on my collage studies, pleazzzz... help me I'm sick of asking this on many forums, hope RepRap will help as I started it from here.:(:(:S https://reprap.org/forum/read.php?1,10752,10752#msg-10752 Tue, 21 Apr 2026 16:21:17 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,10752,10762#msg-10762 https://reprap.org/forum/read.php?1,10752,10762#msg-10762
although, technically we dont really recommend a JDM programmer anymore. there are pages on it in the wiki, but they should be updated.]]> ZachHoeken General Thu, 03 Apr 2008 14:03:22 -0400 https://reprap.org/forum/read.php?1,10752,10757#msg-10757 https://reprap.org/forum/read.php?1,10752,10757#msg-10757
Better yet, note that Reprap has, in the past few days, committed to shifting to the Arduino technology for control boards and go that route.]]> Forrest Higgs General Thu, 03 Apr 2008 11:23:17 -0400 https://reprap.org/forum/read.php?1,10752,10752#msg-10752 https://reprap.org/forum/read.php?1,10752,10752#msg-10752
I have made a JDM progammer and now tryinig to test it by the following steps which I got from:
[www.reprap.org]

THESE ARE THE TESTING STEPS:

If you're using Windows and ic-prog (which I'm using!), then go to Settings | Hardware Check. Plug in the programmer and leave the IC socket empty. You should observe the following:
1 Using a multimeter, measure the voltage on the IC socket between pin 5 (-) and pin 14 (+). It should be just below 5V.
2 When you tick Enable Data Out, the Data In checkbox should also become ticked (and vice versa). You cannot directly tick the Data In checkbox.
3 Measure the voltage between pin 5 (-) and pin 13 (+). It should read around -2V to -2.5V. When you tick the Enable Data Out checkbox, it should swing to 4.5V to 5V.
4 Measure the voltage between pin 5 (-) and pin 12 (+). Tick the Enable Clock box and it should go to +5V (or a little more). Untick it and it should return to 0V (actually about -0.5V to -0.8V).
5 Measure the voltage between pin 5 (-) and pin 4 (+). Tick the Enable MCLR box and it should go to +12V. Untick it and it should return to 0V (actually about -0.5V).

The thired step, bolded letters is what I am getting as +3.15V which should be -2V to -2.5V, after that every thing is right, I mean every thing except this bolded letters only not the whole steps!!
PLEASE HELP ME!!
I used 100uF/63V insted of 40V and 22uF/25V insted of 16V but I don't think that can cause problem or can it? (Exact values of capacitor voltage is not available!)
Give me schematic if I need to make some interface, I'm a layman. Please don't just tell me to search over net, I'm tired of that (from last two weeks I'm trying to fix this) and now I want to concentrate on my collage studies, pleazzzz... help me I'm sick of asking this on many forums, hope RepRap will help as I started it from here.:(:(:S]]> Anonymous User General Thu, 03 Apr 2008 01:01:16 -0400