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|   April  8, 2007 at 9:23 PM

This is a good IC for robotics. It is a quadruple half-H driver but by connecting certain pins it can be used as a dual full H-bridge. See data sheet for more info.

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|   November  8, 2007 at 10:49 PM

The data sheet you really want (for DC motor control) is found on the TI web site, but search for the L293 and grab that data sheet. Have a look at Figure 5 on Page 9 to see how to use the 754410 as a reversing controller - you can just ignore the anti-kick back resistors. Vcc2 is also handled in the 754410. The usual 7400 or 7404 (or similar) can be used to invert a single control signal, or a microcomputer (like ATTiny) can provide the inputs.

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|   January  3, 2009 at 7:43 PM

Do you mean anti kickback diodes? I see no resistors on page 9, fig. 5.

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|   December  4, 2008 at 10:54 PM

This is a great chip. I just hooked it up to my Arduino and am using it to drive a tank tread base.

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|   May 20, 2009 at 11:31 AM

In dual full H-bridge mode, mentioned in the post below, could it be used to independently power two motors forward and backward? Or would I still need one per motor? And if so, how do I do this? I can't figure it out via the schematic.

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|   May 20, 2009 at 11:40 AM

I feel dumb now but I answered my own question.It can be used to control two motors independently forward and back by keeping 1,2EN and 3,4EN HIGH at all times and changing the A inputs.

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|   November 12, 2009 at 7:02 PM

I got one of these to use in a picaxe 18 high power board (CHI035). It does not work as well as an L293D.

I used the CHI035 to replace an 08 based picaxe motor controller which includes an L293D. That controller was used with a Tamiya tracked chassis and it worked fine.

Once I placed the CHI035 (with this chip installed) on the track chassis, this chip would quickly heat up and the voltage would start to drop. With in a few seconds of operation it would drop below 0.5V.

I replaced this chip with a REAL L293D and it works perfectly.

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|   November 29, 2009 at 9:58 PM

how can I control the speed of a dc motor using an arduino?

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|   November 30, 2009 at 8:03 PM

Love using these things in my robots except I fried one and soldered the other one and get get it off (all my fault : /) these are wonderful and will be getting more.

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|   December  3, 2009 at 7:25 PM

Awesome chip! Just got a few from a friend that has bin holding my hand through the dark with this stuff. Robot here I come!

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|   December 11, 2009 at 2:27 AM

Here is a really nice tutorial on using one of these. They were nice enough to link here so I thought I would lonk them back.

http://itp.nyu.edu/physcomp/Labs/DCMotorControl