I created a simulation circuit for a KF-301(or KY-019) to analyze how the circuit works before I build one. Such module is important circuit part when powering AC household electronics and controlling using microcontroller like Arduino or ESP32. Th…
Controlling the direction of a DC motor is a fundamental concept in robotics and automation. One of the simplest ways to achieve this is by using an H-Bridge circuit . While transistor-based H-bridges are common, using relays offers a straightforw…
Relays offer the benefit of utilizing durable copper contacts, enabling them to handle high current loads with a relatively low input current. However, since the solenoid in the relay takes some time to actuate the contact, using Pulse Width Modulat…
Automatic light switches are a modern solution to energy-saving and convenience in homes and workplaces. This post explains how to build a simple automatic light switch using a PIR sensor, a 5V relay, and a BC547 transistor. This design is efficient…
Here, we’ll dive into a practical relay-based circuit that allows you to control an AC-powered load (like a light bulb) using a low-power DC signal. This circuit is simple, cost-effective, and highly versatile for various home and industrial automa…
Controlling actuators such as motor using an Arduino can be a simple task with the right components. Using relay we can avoid any damage to the microcontroller, the actual and other electronics circuits component in the system. In this guide, we wil…
