Problem with L298 h-bridge - Page 2 - Electronic Circuits Projects Diagrams Free

katew · 21st May 2007, 01:28 PM

still got some more holes that i do not really know the purpose of it.and Thanks for the previous reply.

ericgibbs · 21st May 2007, 02:29 PM

hi,
The 10way IDC connector fits into some of those holes. see modified dwg.

The other pad holes are not referred to in the circuit diagram also looking at the picture of the assembled pcb, there are no components in those holes?

The color layout on the website has so many differences from the actual pcb so its useless as a guide.

As there is NO logic power decoupling on the pcb and the 'holes' are near the +5V and 0V I would guess that the designer had intended to fit decoupling capacitors in those spare holes.

ericgibbs · 22nd May 2007, 08:14 AM

hi katew,

I have been looking thru the website where you got the HB design.

I think whoever has added the 'text' along side of the PCB have got the power rails incorrectly marked!

I have now downloaded all the info from the website, give me 24hrs and I'll get back to you. Hopefully with some ideas.

What ever you do, DONT apply any power to the pcb at this time.

ericgibbs · 22nd May 2007, 09:33 AM

hi katew,

Attached modified drawings.

Checking the website, it appears that someone has modified the original
details to suit different motor configurations. You will have to study the website text to decide which version you going to use.

Hope this helps.

bingbinICE · 22nd May 2007, 04:23 PM

Quote:

Originally Posted by katew

i am currently a student who is working on the h-bridge with L298 ic. This h-bridge is going to run 2 dc gear motor with 12v and 1.1A. I followed the circuit diagram from this website below.

http://www.dprg.org/projects/1998-04a/

However,this website didnt tell me what is the code for the diode. My friend recomment me to use either IN4001 or FR202. Which 1 will be suitable.
Is there anything i need to modify on this circuit diagram that i found?

http://urerobots.googlepages.com/Mot...niH-bridge.png

I had used 5819

dknguyen · 22nd May 2007, 06:09 PM

Quote:

Originally Posted by prasetyo

Hey I'm a new member in this forum.....

best regards,..

wattup.

You can make new threds by clicking "new thread" at the top of the screen when you are in a forum (and outside of a thread).

katew · 27th May 2007, 10:31 PM

i cant find 1N5819 in the town,so i bought 1N5832...which can substance till 1.5A

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22nd May 2007, 08:14 AM	(permalink)
ericgibbs	hi katew, I have been looking thru the website where you got the HB design. I think whoever has added the 'text' along side of the PCB have got the power rails incorrectly marked! I have now downloaded all the info from the website, give me 24hrs and I'll get back to you. Hopefully with some ideas. What ever you do, DONT apply any power to the pcb at this time. __________________ Eric "Good enough is Perfect" PIC tutorials: Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/

27th May 2007, 10:31 PM	(permalink)
katew	i cant find 1N5819 in the town,so i bought 1N5832...which can substance till 1.5A