I'm trying to make work two motors(for a mini car) with a L293DNE the problem i found it is that the lower the signal i send to the enable pin the more uneven the voltages become.
Im using a 7.4V battery at Vcc2 and the 5 volt of the arduino at VCC1
I i analogWrite 255 to EN1(pin 3 from arduino)and EN2(pin 6 from arduino), i get on my two pins those voltages:
And on the output pins of the L293DNE i get the following voltages:
Now if i instead i write with analogWrite 50 to my enable pins i get the following voltages at the pins
0.979v (Dont know if this little difference of PWM voltage make that much different on the L293DNE hope no) 0.993v
And the outputs of the L293D
(the outputs at the H-bridge both acted like capacitors in my multimeter because the voltage increases if i left them connected to multimeter, but what is certain is that my Second bridge on the L293D is giving me much more voltage than the first one.)
I have tried searching on the web and the forums and have not found anything similar, i added capacitors of 333uF at both Vcc1 and Vcc2, and still no luck.
done the tests without load, with a tiny capacitor a cross of outputs and with motors, its always uneven, and the uneveness increases as pwm output is lower, also tried with two different L293DNE's.
Well hope someone could help me, thank you.