Yes, you can hook these pins to the PWM pin on Arduino. The Enable pin on the L298N acts as a gatekeeper for the power supplied to the motor. When the pin is Set HIGH, the motor is enabled and can run. When Set LOW, the motor is disabled and stops. By connecting the Enable pin to a PWM-capable pin on the Arduino and sending a PWM signal, you can control the effective voltage supplied to the motor. This changes the speed of the motor: A higher duty cycle (e.g., 100%) means the Enable pin is HIGH most of the time, allowing full power to the motor and thus full speed.A lower duty cycle (e.g., 50%) means the Enable pin is HIGH only half the time, reducing the average power supplied to the motor and thus reducing the speed. Here's an example that demonstrates how to Set up and control the motor speed connected to A channel: // Define pins const int ENA = 9; // PWM pin for Motor A const int IN1 = 8; // Direction pin 1 for Motor A const int IN2 = 7; // Direction pin 2 for Motor A void Setup() { // Set pin modes pinMode(ENA, OUTPUT); pinMode(IN1, OUTPUT); pinMode(IN2, OUTPUT); } void loop() { // Set motor direction digitalWrite(IN1, HIGH); digitalWrite(IN2, LOW); // Set motor speed using PWM analogWrite(ENA, 127); // 50% duty cycle, half speed delay(2000); // Run for 2 seconds // Change motor speed analogWrite(ENA, 255); // 100% duty cycle, full speed delay(2000); // Run for 2 seconds

Relay modules are incredibly versatile and can be used in many creative and practical applications. Below are some ideas beyond just turning lights on and off: 1. Home Automation:Use a relay module to automate household appliances like fans, coffee makers, or even a WAter heater. These can be triggered using a microcontroller, voice commands (via Alexa or Google Assistant), or a mobile app. 2. Smart Irrigation System:Control WAter pumps or solenoid valves in a Garden or farm Setup. A soil moisture sensor can activate the relay to start WAtering only when n ...

I'm troubleshooting a communication circuit and often hear people say to “set the trigger” on the oscilloscope. I’m confused—what’s the difference between just connecting the scope and actually Setting the trigger? What does the trigger do, and how does it help in viewing signals properly?

I’ve noticed that the LM317 linear voltage regulator is still widely used in various hobbyist and even some professional circuits, despite the availability of efficient and compact switching regulators. Considering that switching regulators offer better efficiency, less heat dissipation, and smaller footprints, what are the reasons engineers or designers still opt for LM317 in certain designs? Is it due to simplicity, cost, noise sensitivity, or something else?

Yes, much of the heating behaviour is inherent to older bipolar-driver ICs like the L293D and L298N. Those chips use bipolar transistors (Darlington or bipolar output stages) with large voltage drops, so a significant fraction of motor power is dissipated in the chip as heat. Wiring and supply issues (thin wires, poor decoupling, undervoltage, high stall currents) can worsen the problem, but replacing the driver with a Modern MOSFET-based H-bridge or dedicated MOSFET motor driver typically reduces losses by orders of magnitude and greatly lowers heat.

I’ve been using L293D and L298N motor drivers and noticed they heat up quickly, even under light loads.Is this inherent to these older ICs, or could it be a wiring/power supply issue on my side? How much of a difference would Modern MOSFET-based drivers make in terms of efficiency and heat dissipation?

... to bake a cake. Your loop() function is carefully measuring flour, mixing ingredients, and so on. Now, what if the doorbell rings? Without interrupts (the loop() WAy): You'd have to finish a major step in your recipe (like mixing the batter) and then quickly run to the door to check if anyone is there. If your recipe step takes a long time, your visitor might get impatient and leave. This is called polling – repeatedly checking the state of something. With interrupts: The moment the doorbell rings, you'd immediately pause what you're doing (even if you're ...

Definetly not, Dont switch to amps or move the red lead to the A/10A jack while your probes are on a live circuit. In A mode the meter is basically a short; flipping to it or probing voltage with the lead in A can blow the fuse, make an arc, or worse. Set the meter and leads with power off, break the circuit, insert the meter in series, then power up. For mains, use a clamp meter; for 12 V high-current systems be extra cautious or use a clamp/shunt. And always move the red lead back to V when you’re done to avoid the classic “next-time short.”

There are a lot of WAys you can use the HCSR04 Ultrasonic sensor. Try making a gesture-controlled light switch—wave your hand to turn it on! Or build a musical instrument that changes pitch based on how far your hand is. If you WAnt something practical? Try to Set up a smart trash can that opens when you get close, or count how many times you do push-ups with a sensor tracking your chest movement. You could even rotate it on a servo to scan a room like a mini radar. The possibilities are endless.

I'm trying to connect a 16x2 LCD to an Arduino Uno, but I currently don't have a 10k potentiometer (the one usually connected to the VO pin) to adjust the contrast. Is there a reliable WAy to control the contrast without using a potentiometer? For example, can I use a fixed resistor, or is there a WAy to Set contrast through software or a PWM pin? I'd really appreciate your suggestions if anyone has tried this or has a workaround that works well. Thanks!

Hi everyone, For our school project, we’re building a robotic car that can be controlled using voice commands. We WAnt to integrate Alexa with Arduino IoT Cloud to make this possible but don't know how to Set it up. What’s the best WAy to connect Alexa to Arduino IoT Cloud, and what challenges should we be aware of?

... for beginners who are new to RF like me, and even the cheapest RF power meters cost hundreds of RMB. For electronics enthusiasts who follow the principle of "spend when you should, save when you can", DIYing an RF power meter is a great alternative. The first step WAs to define the functions and design the hardware circuit. To test RF power, a chip called a detector is required. I had not found a suitable option for a long time as it WAs my first time working with an RF detector, until I saw the power detection module on the E25-C test baseboard, which use ...

When you simply connect an oscilloscope to a signal, the screen may show a WAveform that appears unstable, jittery, or rolling. This happens because the scope doesn’t know when to start drawing each WAveform—it just keeps refreshing as data comes in. That’s where the trigger comes in. The trigger tells the oscilloscope when to begin drawing the WAveform on the screen. It locks the display to a specific event—like when the signal crosses a certain voltage level going up (rising edge) or down (falling edge). By doing this, it ensures that each sweep starts a ...