Help With H-Bridge

[Moisff]

Hi guys, i'm making an H-Bridge motor driver for a water gun turret. The idea is that when i send a 5v signal to one side it turns the motor one way and when i send a signal to the other side it turns the other way. Quite simple really and i'm sure everyone's seen an H-bridge before.

Anyway this is my problem:

-Testing it out on Multisim there were no problems at all
-Building it on the PCB and testing it caused the TIP 125's to blow up

This wasn't expected. I've uploaded a PDF with my testing on Multisim and my circuit design for it, if anyone could point out any glaring mistakes for me i'd greatly appreciate it.

Cheers

 

[Moisff]

Also it's saying i've uploaded the pdf but nothings showing up. I'm a newbie to this forum so any help would be appreciated

 

[3v0]

Try again and check to be ensure that you PDF is not larger then the max size allowed.

 

[Moisff]

It goes through all the process and when it's finished the screen just goes blank. Who do i contact through the website about it?

 

[3v0]

PDF's are limi9ted to 9.54 MB what size it the one you tried to upload?

I tested the PDF upload and it seems to be working.

 

[dknguyen]

!!! You can upload PDFs here?! WHy have I then been printing screen, pasting in PaintShop, and cropping the image like a fool when I can just print it as a PDF and upload it?

 

[bloke_man]

Hi guys, i'm making an H-Bridge motor driver for a water gun turret. The idea is that when i send a 5v signal to one side it turns the motor one way and when i send a signal to the other side it turns the other way. Quite simple really and i'm sure everyone's seen an H-bridge before.

Anyway this is my problem:

-Testing it out on Multisim there were no problems at all
-Building it on the PCB and testing it caused the TIP 125's to blow up

This wasn't expected. I've uploaded a PDF with my testing on Multisim and my circuit design for it, if anyone could point out any glaring mistakes for me i'd greatly appreciate it.

Cheers

Some H Bridge theory found here:

http://www.mcmanis.com/chuck/robotics/tutorial/h-bridge/index.html

also PWM control.

Cheers!