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Diodes
Hi Vision,
Looks like your schematic has the diodes reversed biased, I'm not sure you even need them try reversing them or jumpering them and see what happens, I haven't even looked at your code, I assumed the others did.
JS
edit
mister_e I see what you meant about using the correct forum, what manner of basic is that? Looks like a cross between c and basic. JS
Last edited by Archangel; - 30th November 2006 at 09:39.
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thanks all of you for your replies...
Yes I tried Google search but in vain , Well I'll try again
Actually I thought about adding my question in the schematic forum ,but thought about the PIC problem....
mister_e: why my circuit will never work ? Is there something wrong?
and please don't make your bad day affect your welcome to the newbies
Last edited by vision; - 30th November 2006 at 15:04.
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Originally Posted by vision
thanks all of you for your replies...
Yes I tried Google search but in vain , Well I'll try again
Actually I thought about adding my question in the schematic forum ,but thought about the PIC problem....
mister_e: why my circuit will never work ? Is there something wrong?
and please don't make your bad day affect your welcome to the newbies
You tried a Google search...in vain? I just did a quicky and got over 1.43 million hits. I even got 186 hits on the images.
Try again....
JDG
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Sorry Vision for my stupid attitude...
The major problem is the reverse biased diodes for your PNP transistors. AND if you're going to drive inductive load, you'll have to add 4 diodes to avoid back emf.
something like the following is recommended
http://www.mcmanis.com/chuck/Robotic...t-circuit.html
OR
http://www.bobblick.com/techref/proj...e/hbridge.html
There's also dedicated ICs for that. L293D is popular.. and there's more and more like that.
HTH
welcome to the forum... even if you're using PDS Proton
Last edited by mister_e; - 1st December 2006 at 05:05.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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skimask :Thank you for your hint about the google IMAGE search,I didn't even think about it
mister_e :Thank you man
I'll inform you about the results
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skimask :Thank you for your hint about the google IMAGE search,I didn't even think about it
mister_e :Thank you man
I'll inform you about the results
skimask :Thank you for your hint about the google IMAGE search,I didn't even think about it
Well, that backfired on me...and I thought I was being a smart ass! Glad you got some use out of it...
JDG
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I use the L293DD for both stepper and DC gear head motors. It is a great work horse, but is there something smaller and or lower power for driving motors up to 100 mA? The Microchip 4424 looks good, but you would need two for the steppers. Any ideas?
Thanks,
Ron
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