# L298n H-Bridge Jumpers

**URL:** <https://forum.arduino.cc/t/l298n-h-bridge-jumpers/965521>\
**Category:** General Electronics\
**Created:** [March 3, 2022, 8:13pm UTC](https://forum.arduino.cc/t/l298n-h-bridge-jumpers/965521 "2022-03-03T20:13:10Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Brazilino](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/brazilino/32/1198404_2.png) [@Brazilino](https://forum.arduino.cc/u/Brazilino)\
**Post date:** [March 3, 2022, 9:03pm UTC](https://forum.arduino.cc/t/l298n-h-bridge-jumpers/965521/4 "2022-03-03T21:03:47Z")

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@MarkT and @groundFungus questions are very important for good advice, but considering that it´s your first post (welcome by the way!), I will assume that you´re a begginer and give you general answer, which you can also easily obtain Googling tutorials on the L298N board.

This module has 3 jumpers. InA, InB and Regulator.

![image](https://europe1.discourse-cdn.com/arduino/original/4X/e/0/8/e0871f548687466c771a7cf9f1ce76787056bb65.jpeg)

If you use the jumpers on InA and InB, you will set the motors A and B able, with full speed. If you don´t use the jumpers, both motors will be disabled but, in this case, you can connect the outter pins to a PWM capable port of Uno and control the speed of the motors using analogWrite() function.

The Regulator jumper (if connected) activates the voltage regulator that provides 5V voltage to the 5V logic on the L298N circuit, from the higher voltages applied to +12V of L298N board . So you can:

a) feed the board with 7,4 to 12V, use the jumper and let the regulator provide 5V to the logic circuitry.  
b) feed the board with 4,5 to 6V, do not use the jumper and feed the circuitry (+5V of L298N) with 5V incoming from Arduino.

Notes:

- It´s recommended to provide separate power trunks for the motors and the Arduino card. (EDIT: Arduino is not a power provider. Feeding +5V L298N with 5V incoming from Arduino will turn on L298N board but will not be enough to move the motors).
- for (b) I´m considering that you´re using the most common 3-6V DC motors. Heavier motors will not work with 4,5V.

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