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Topic: Mosfet H-bridge (Read 1 time) previous topic - next topic

yes955

Jul 07, 2013, 09:23 pm Last Edit: Jul 07, 2013, 09:28 pm by yes955 Reason: 1
Hey. I am new to electronics and I have a problem that I hope someone won can help me with.
I am trying to build an H-bridge but for some reason the first power mosfets (IRFZ44N) has a very big voltage drop. I only have 5 volts and it uses 3 volts.

On the picture it would be number 1 and 2 that are the problem.

Edit:
i have 6 volts

CrossRoads

Well, looking at a datasheet
http://www.irf.com/product-info/datasheets/data/irfz44npbf.pdf
we can see that this is an N-channel MOSFET.
For an H-bridge, one typically uses P-channel  MOSFETs in the 1 & 2 position, for example
http://www.digikey.com/product-detail/en/NDP6020P/NDP6020P-ND/1055922
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

zoomkat

"I am new to electronics" + "I am trying to build an H-bridge" = go to ebay and buy one of appropriate size. If you are considering rolling your own, read the below first.

http://forum.arduino.cc/index.php?topic=53425.0
Google forum search: Use Google Advanced Search and use Http://forum.arduino.cc/index in the "site or domain:" box.

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