You may have damaged your parallel port. They are not designed to light an LED.
Mike.
oh! really? How much mA can they provide?
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You may have damaged your parallel port. They are not designed to light an LED.
Mike.
Thanks for the reply. After, little think-back, I came to conclusion that I hooked of the transistor with Emiter-Collector Swapped!Hi,
At 45ma thats way too high - you have a partial short somewhere -switch off.
If you see the bottom of page 2 of that pdf I posted it shows typical currents at various stages, which your programmer should similarly follow.
How have you constructed it, a pcb or strip board or breadboard.. ?
....to try to get the stupids things to work...no matter how much it actually costs or how long it actually takes.
Maybe, just maybe, the people recommending the PICkits have learned from their mistakes along the way.
I didn't quite get what you meant to say, but reading your quoted text, I think you want to tell me --"See that, I already told you those stupid things don't work! and Now you are stuck!!! Thats the penalty for not doing what I told."I rest my case.
Hi,
Was out after my last post so only just seen your photos.
You have used a 7805 instead of the much lower current 78L05 which may account for most of the 45ma.
Best way to check this is to disconnect the 7805 output , connect the power and measure the current being taken by just the 7805 then add the 18ma that the transistors and ic should take - does that equal 45ma - if so then it seems there is no short.
Getting the transistor pin outs wrong is an easy mistake, not all manufacturers use the same pinout for the same transistors, so you must check them carefully.
The other thing that caught my eye from your photo was what seems to be the parallel data leads, they are just plain wires - perhaps they go to a proper parallel lead - its important you use a good quality paralllel lead if your connection is more than a foot away, otherwise the signals can be lost.
Actually, what I said was that usually, trying to built a programmer wasn't worth the effort and frustration, and that a PICkit 2 would probably be cheaper in the long run. Many people who try and build these give up in frustration.
After bread-boarding your programmer and 5 pages of help from forum members, you still don't have anything that works. And a lot of people have given up their time to try and help.
If your goal is to spend time debugging a programmer, more power to you. IF your goal is to actually work with PICs and program them, you're not making much progress.
I shared with you my experience that these programmers are a pain in the butt. You said I didn't know what I'm talking about. Remember, nobody here OWES you any help and assistance. You might benefit from good advice or not.
Hi,
As you can see from those current figures I did the ic only takes about 4ma.
Your regulator current sounds ok, so you need to isolate whatever is taking the extra power, disconnect the + connection to the ic ( better to use an ic socket so you can easily unplug it ) and see what the current is then.
If that only drops the 45ma by 4-5ma then seems like you have problems with the transistors or wiring.
The problem was with the PC. I switched to another old PC, it worked there (the led glowed). But I don't know, if its the issue with the OS (both Xp), or the parallel port itself.
Yes it does. I think, the parallel port is already damaged (my be by my elders who had already experimented on it. )hi
Do you have the 'input32.dll' in your Windows/System32 folder.? its required for Win XP.
Yes it does. I think, the parallel port is already damaged (my be by my elders who had already experimented on it. )
What do you think of the CMOS replacement?
Problem is with a CD4069 its NOT an open output, its got an active pull up, you would have two active outputs connected together which is a bad idea.