ENA and ENB jumpers on the L-298N H-bridge

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I notice that there are different variants of the L-298N H-bridge. I have in my hands this one:

I searched for documentation on the web, but didn't find any yet of this specific model. I'll keep searching, of course.

In other models, I notice that the ENA and ENB are pins that you connect to the Arduino board so that you can enable/disable the motors via programming. In this one, the ENA and ENB are double pins with jumpers, as you can see in the photo.

Does anyone know why so?

Also, I suppose I don't have to connect any 5v or GRN from the Arduino board since the description of the bridge states: This module can use built-in 78M05 for electric work via a driving power supply part.But to avoid the damage of the voltage stabilizing chip,please use an external 5V logic supply when using more than 12V driving voltage. and I power the H-Bridge with a 6v (4x1,5v) battery.

I plan to start with a little experiment and try to make one single motor run in both directions.
Do do so, I'm thinking of connecting board, bridge and motor, like this:

800×532 9.3 KB

I'd appreciate any opinions on this.
thnx :slight_smile:

2

You need to connect the Arduino ground to the logic ground on the L298 board (probably the same as motor power supply ground).

I suspect that the jumpers enable the channels, so you do not need to connect those terminals to the Arduino.If it doesn't work, the board documentation would certainly help figure out why.

3

Indeed. I tested it and it works fine. :slight_smile:

(I added the arduino GND connection to my picture, above.)