saturn1bguy
New Member
I did not add the 4 resistors...and it is still working.
As ROFF pointed out, it will work without them, but be much more snappy with them.
I will now check the motor voltage to the supply voltage( I am assuming the 5V to the LM311).
Perhaps we're speaking past each other. What I mean is, if you're using 12V motors, then make the H-Bridge supply 12V to match. If 6V motors, then make your H-Bridge supply 6V. When I say match, you have a bit of leeway because of losses in the Darlingtons, meaning if your're using 12V motors your bridge supply could be a bit higher, say 14-16V, without a problem. (If you were using MOSFETS, you would have less losses in the drive transistors.)
And all of this has nothing necessarily to do with you LM311 supply of 5V...