DROKDC Motor Driver, L298 Dual H Bridge Motor Speed Controller DC 6.5V-27V 7A PWM Motor Regulator Board 12V 24V Electric Motor Control Module Industrial 160W with Optocoupler Isolation

Nothing to dislike about this board. I am NOT an electronics expert, yet I was able to connect up a discarded cordless drill motor and control it with precision. This has all kinds of fun and useful applications for the DIYer.

I used this to replace 2 sets of relay modules, for my solar tracker. Used 12 volts for motors and used UnexpectedMaker's feather S2, which runs at 3.3 volts to drive the enable and direction pins. In my case I used active high, to drive the direction inputs, and reversed the motor leads, that way I did not have to make changes to my software for driving the horizontal and vertical actuators.

Je mets l'accent sur la puissance de sortie car celle proposée par exemple par les modules L298 limitent la sortie à 2A alors que là avec 7A on fait face à la plupart des applications.Pilotage indépendant de 2 moteurs dans les 2 sens avec entrées PWM pour la variation de vitesse.Je l'emploie avec un Arduino UNO. Le variation de vitesse va de 0 à 100% (je dis bien 100% plus de découpage mais tension maximale).Pour la sécurité en cas de coupure d'alimentation alors que les moteurs sont à pleine vitesse le fabriquant conseille l'utilisation d'un relais pour protéger le dispositif de l'effet dynamo des moteurs qui induirait des tensions inverses sur les transistors à effet de champs (puisque plus alimenté par la coupure d'alimentation), moi j'ai mis un pont redresseur sur le moteur (entrées alternatives sur les bornes du moteur, la sortie plus vers le plus de l'alimentation et la sortie moins vers ... le moins (vous l'aurez deviné). La tension inverse reçue par les transistors est au maximum de 0,6V ce qu'ils supportent sans problème.

Bon produit , livraison rapide .

This unit is perfect for my application with a couple of 2-3 amp DC motors and worth far more than the cost. I require frequent direction changes and large starting current spikes, but the board stays cool and doesn't need heat sinks. The connectors have screw terminals and removable snap lock connectors which are excellent.The documentation looks great on glossy paper but needs some clarification.Here's a few tips and a Arduino test setup:1) This double H-bridge can run two motors independently of each other.2) Each motor can run forward, reverse, brake, full speed forward, and full speed reverse.3) Categories of inputs (you provide these) to the board are: a) Main power (up to 15 amps) that is used to drive both motors. Read the instructions around voltages, current, peak current, fuses, etc... b) Control logic for Motor A c) Control logic for Motor B d) 5v power you provide into the board for it's logic processing, etc.. with very little current draw.4) For the main power input, you need a capable power supply. I'm using a 10amp battery charger.5) You must feed 5v into the board. The board has 5v (and ground) pins for each motor, but you only need to provide 5v and ground on one set of pins.6) Each motor needs three 5v logic inputs. For motor #1 they are labeled IN1, IN2, and ENA1.7) The two pins labeled IN1 and IN2 are fed from any two GPIO(Arduino) pins with HIGH or LOW to control the mode of the motor such as forward, reverse and brake. See the control logic table in the instructions.8) The pin labeled ENA1 REQUIRES!!! a PWM output from Arudino. You MUST NOT apply a steady voltage from something like a potentiometer or DAC output.9) Here's a basic test setup for Arduino UNO if you need it:Connect 5v and ground to H-bridge,Connect main powerConnect motor(s), you just need motor A for this testConnect Ardunio pin2 -> H-bridge pin IN1Connect Ardunio pin3 -> H-bridge pin ENAConnect Ardunio pin4 -> H-bridge pin IN2Create a test sketch as follows:void setup() {pinMode(2, OUTPUT);pinMode(3, OUTPUT);pinMode(4, OUTPUT);}void loop() {digitalWrite(2, LOW); //forwarddigitalWrite(4, HIGH); //forwardanalogWrite(3, 178); //pin 3 is PWM, 178/255 = (about) 70% speed. Max is 255.delay(1500);digitalWrite(2, HIGH); //reversedigitalWrite(4, LOW); //reverseanalogWrite(3, 76); //pin 3 is PWM, 76/255 = (about) 30% speed. Max is 255.delay(3000);}Hope this helps get you started.