Hedy articles - 158 total
What is an interrupt and how is it used?
What Is an Interrupt? An interrupt is a signal that temporarily stops (or “interrupts”) the normal...
How to connect multiple sensors to one Arduino Uno serial port?
Arduino Uno only has one hardware UART (pins 0/1 shared with the USB), but you can still hook up...
How to debug FPGA Verilog HDL code?
Here’s a practical, repeatable workflow to debug Verilog on FPGAs—fast feedback in sim, then confirm...
How can I learn USB communication for STM32?
Learning USB communication on STM32 involves understanding USB protocols, STM32 hardware support, and...
How to connect sensors with Raspberry Pi GPIO?
Here’s a quick, practical guide to hooking sensors to a Raspberry Pi’s GPIO—covering digital, I²C,...
How to implement multitasking scheduling mechanism on a microcontroller?
Below is a compact, field-tested roadmap for building a multitasking scheduler on a...
How do Hall effect sensors work for speed or position detection?
Hall effect sensors are widely used for speed measurement, position detection, and rotational sensing...
How to build a robot car using an L298N motor driver, DC motors, and Arduino?
Let’s build a robot car using an L298N motor driver, DC motors, and Arduino! Below is a complete...
How to configure ESP32 environment with Arduino?
The ESP32 (by Espressif) is a powerful Wi-Fi/Bluetooth-enabled microcontroller. To program it using...
How to use Systick to achieve microsecond (us) level delay in STM32？
SysTick is a built-in timer in ARM Cortex-M cores that can provide precise timing for delay...
How to Flash Raspberry Pi OS to an SD Card? (Step-by-Step Guide)
Flashing Raspberry Pi OS (formerly Raspbian) to an SD card is simple. Here’s how to do it on Windows,...
How to control an LED’s brightness using a potentiometer
Components Needed: Arduino (or any microcontroller with ADC + PWM). 10kΩ potentiometer. LED + 220Ω...
How do timers work in microprocessor systems?
In microprocessor systems, timers are essential peripherals that provide time-related functionality...
Hardware Implementation of FFT Algorithm Based on FPGA
The Fast Fourier Transform (FFT) is a computationally efficient algorithm for computing the Discrete...
How to read data from I2C or SPI-based sensors?
Reading data from I2C or SPI sensors with microcontrollers (like Arduino, STM32, or ESP32) involves...
How to measure phase difference with STM32?
Measuring phase difference between two signals (e.g., voltage and current) with an STM32...
How to blink an LED using Arduino?
Blinking an LED using an Arduino is one of the most basic and common beginner projects. Here's how to...
What to do if Raspberry Pi won’t boot?
If your Raspberry Pi isn’t booting, follow these steps to diagnose and fix the issue: 1. Check...
Modern Microprocessors in Autonomous Driving: Key Applications & Technologies
Autonomous driving (AD) relies on high-performance microprocessors to process sensor data, make...
How do you reduce power consumption in an FPGA?
1. Clock Domain Optimization Clock Gating: verilog always @(posedge clk) begin if (enable)...
How to use a microcontroller to control a relay?
Controlling a relay with a microcontroller (e.g., Arduino, ESP32, Raspberry Pi Pico) is a fundamental...
How do light sensors like LDR or TSL2561 work?
Light sensors like LDRs (Light Dependent Resistors) and TSL2561 work by converting light intensity...
What is the role of the bootloader in Arduino? Why is the Bootloader Needed?
The bootloader in Arduino is a small but critical piece of firmware that enables easy programming and...
Is there a bug in the hardware I2C of STM32?
Yes, there have been known hardware bugs and limitations in the STM32 I2C peripheral (specifically in...
How to add an RTC (Real-Time Clock) module to your Raspberry Pi?
Here’s a step-by-step guide to adding and configuring an RTC (Real-Time Clock) module (like the...
Real-Time Object Detection on FPGA Using HLS
Goal: Implement a low-latency object detection pipeline (e.g., Sobel edge detection + Haar cascades)...
A minimal FreeRTOS example for an STM32 microcontroller
Here’s a minimal FreeRTOS example for an STM32 microcontroller (works with STM32CubeIDE or...
Using DMA-based ADC sampling with STM32 (HAL library)
Here's an example of using DMA-based ADC sampling with STM32 (HAL library) to read analog temperature...
How do I configure GPIO pins on STM32?
To configure GPIO pins on STM32, you typically use either STM32CubeMX/STM32CubeIDE (GUI-based) or...
How do you handle metastability in FPGA designs?
What Is Metastability? Metastability occurs when a flip-flop receives input data that changes too...