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August 27, 2020

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Sine wave generation Program using on EDSIM51 (assembly language)

Sine wave generation Program as shown in the video ----------------------------------------------------------------------------------------------------------------------------- CLR A; clear the accumulator UP: MOV DPTR,#SINE MOV R0,#24 CLR P0.7; enable the DAC write line LABEL: MOVC A,@A+DPTR MOV P1,A CLR A INC DPTR DJNZ R0,LABEL SJMP UP ORG 050H SINE: DB 127,160,191,217,237,250,255,250,237,217,191,160,127,94,63,37,17,4,0,4,17,37,63,94,127 END ----------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------- Lookup Table for sine wave 256 point 8 bit microcontroller ----------------------------------------------------------------------------------------------------------------------------- 0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb0,0xb3,0xb6...

Getting Started with NodeMCU and ESPHome: A Beginner's Guide

The world of home automation is vast and exciting, with numerous platforms and tools to help you control and monitor your smart home devices. Two popular tools in this ecosystem are NodeMCU and ESPHome. In this guide, we'll explore how these tools work together and how you can use them to create a seamless and efficient smart home setup. What is NodeMCU? NodeMCU is an open-source firmware and development kit that helps you to prototype and build your IoT (Internet of Things) applications. Based on the ESP8266 Wi-Fi chip, NodeMCU allows for easy connectivity and programming, making it a favorite among DIY enthusiasts and developers. With its integrated Wi-Fi capabilities and GPIO (General Purpose Input/Output) pins, you can connect sensors, actuators, and other devices to your network with minimal effort. What is ESPHome? ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful configuration files and control them remotely through Home Automation systems. ESPHome si...

Exploring PWM Control of LEDs with mbed on STM32

Introduction: Pulse Width Modulation (PWM) is a widely used technique for controlling the brightness of LEDs in embedded systems. In this blog post, we'll delve into the world of PWM control using the ARM mbed platform on the STM32 microcontroller. By the end of this guide, you'll have a solid understanding of how to implement PWM to achieve precise control over the intensity of your LEDs. Understanding PWM: PWM works by varying the duty cycle of a square wave signal to control the average power delivered to a device. For LEDs, this means adjusting the time the LED is on versus off to control its brightness. In the context of mbed and STM32, we'll be manipulating the PWM signals to regulate LED brightness. Setting Up mbed and STM32: 1. **Hardware Setup:** Ensure you have an STM32 development board and an LED connected to one of the PWM-capable pins. 2. **mbed Configuration:** Create an mbed project and import the STM32 library. Configure your project settings t...

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