L293N Motor Controller
June 3, 2010
I'm trying to build a DC motor driver for my new Adruino and i'm very new to all of this. I'm going to use the L293N motor driver and I'm trying to figure it all out with this tutorial.
I'm going to be running two geared 143:1 gear motors which can be found here
I would like to solder everything to a PCB board similar to the one in the tutorial. I have quiet a few questions and many of them I feel embarrassed to ask.
1. I'm pretty confused with what is positive and what is negative. The diagram shows only one line which directs the current. Obviously that is not right. I understand that pins 1 and 9 need a negative charge and pins 8 and 16 need a positive charge. Please correct me if i'm wrong. It must have more than one wire where is shows just one red line right?
2. The diagram shows the micro-controller and the motor driver being power by the same power supply. I thought this was a bad thing to do. We do have the 5v regulator in place, so that makes it okay right. I just don't want to fry my chip.
3. What is the the black power out regulated thing for? Is the two pronged thing to power the microcontroller?
4. What are the blue things called for for the power in and the two motors? Also what is the two pronged power out regulated thing called. I just need some names as i start to look up parts to purchase.
Any help would greatly be appreciated. Thank you so much.