Low-voltage DC lighting allows LED fixtures to be powered with a simple resistor instead of a complex driver, which improves safety and reduces component costs. Where is this applicable? How does this relate to solar panels and batteries? Using 48V DC grids, as practiced in India, enables efficient and safe lighting solutions.
Learn how to create a DIY voltage-boosting LED driver using the principles of a step-up (boost) converter. The guide covers the design and operation of pulse power converters, focusing on current and voltage feedback mechanisms, using a homemade LED flashlight as an example. It details the assembly of a step-up converter with adjustable brightness, utilizing components like coils, capacitors, and a feedback system for effective voltage regulation.
Explore the pros and cons of using LED retrofits versus dedicated LED fixtures, focusing on installation ease and performance differences. Discusses the challenges of retrofits, including size constraints, voltage spike susceptibility, and lighting distribution issues. Learn about low-voltage lamp fixtures for halogen lamps and their improved reliability with LED retrofits in 12V DC systems.
Constructing a custom fitness tracker or gesture recognition device requires an accelerometer, specifically the ADXL335. This compact sensor detects acceleration through a suspended mass that shifts during movement. The setup involves connecting capacitors and operational amplifiers to process the sensor's output. The article outlines the steps to create a step counter by filtering and amplifying the signal, resulting in clock pulses for counting. A video demonstration showcases the circuit in action.
Light flicker in LED lighting arises from the conversion of alternating current to direct current, leading to periodic fluctuations in brightness. These fluctuations can affect human perception and cause fatigue, especially at frequencies of 100–120 Hz. Acceptable flicker percentages, regulated by standards, should remain below 9.6% for general use and 4% in sensitive environments. Understanding flicker metrics and using high-quality drivers can help mitigate these effects effectively.
