B&K Precision has introduced the DML Series DC electronic load system, a modular platform with a 4U mainframe that supports up to four channels and 800 W. The system uses swappable single- or dual-channel load modules with front-panel inputs providing up to 80 V and 80 A, or up to 160 A in parallel operation,…
In this project, we’ll build a “smart” restroom door system using PNP and NPN transistors, where simple switching logic replaces software. The design avoids apps and Wi-Fi and instead relies on solid engineering fundamentals. The aim is to design a low-cost, fail-safe solution that detects occupancy, controls indicators, and automates utilities with minimal components. Let’s…
In the previous tutorials, we demonstrated how to communicate data with AWS IoT Core using an ESP32, Raspberry Pi and a computer or laptop. We also covered device-to-device communication through AWS IoT Core using an MQTT broker. In this project, we’ll demonstrate how to communicate with AWS IoT Core using JavaScript. The application developed in this…
Star Wars melody from "How to play musical notes and melody tunes on Arduino."
SMART SECURITY SYSTEM USING RPI
Automatic Wash Basin Tap Controller
Solar
Ping Pong Game
Power smarter, more reliable HVAC systems with TE Connectivity’s Climate Solutions, engineered to meet the evolving demands of heating, ventilation, air conditioning, and refrigeration applications. From residential comfort to commercial and industrial efficiency, TE delivers the components you need to design systems that perform consistently, efficiently, and safely. TE Connectivity combines deep application expertise with…
3D technology began with a simple vision: to recreate real-world objects digitally with precision. Early CAD workflows required engineers to manually recreate physical objects, making the process slow, labor-intensive, and prone to error, particularly when dealing with complex geometries. The emergence of 3D scanning transformed this workflow by enabling engineers to capture the shape and…
Engineering Deep Dive-Monthly Forum Highlights · April Edition Welcome to the April edition of Engineering Deep Dive — a curated selection of the most engaging technical threads from the Electro-Tech-Online community’s Electronic Projects Design/Ideas/Reviews category. Questions are selected based on view counts, reply depth, and educational value. Each entry below has been expanded with context,…
UM 3561 is an excellent Siren generator IC widely used in Toy applications and Surveillance systems to generate different tones. It a ROM (Read Only Memory) IC which can be operated in 2 pen cells and it functions normally down to 2.4 volts. Using only a few components, it is very easy to construct a…
