Circuits & Schematics Light - 8
Subsection: "Light"
Including:| Colour Organ LEDs |
Search results: 168 Output: 71-80
- SK Kaul and IK Kaul EDN The absence of a fast one-shot multivibrator in the entire TTL family, as well as the low-voltage swing and unwieldy supply requirements of ECL, drove us to exploit the fast transition times and low propagation delays of ...15-01-2017
- A basic combination of a photovoltaic panel, multiple LEDs, and a small dc-dc regulator can provide light in dark corners while also offering a modest auxiliary dc-power rail. A solar-powered, daytime-only lamp without a battery for energy storage ...14-12-2016
- Design Note 548 Synchronous buck-boost converters with four power switches can deliver very high efficiency while providing both step-up and step-down DC/DC conversion. Combining the capabilities of two separate converters (buck and boost) has the ...18-10-2016
- Ambient light is increasingly being used as a source of energy. To help designers of such systems, this circuit accurately measures ambient light intensity over four decades of measurement. The design is highly cost effective and, with the sensor ...25-07-2016
- Bjoy Santos EDN Regardless of its color, an LED's light output varies as a function of forward current and ambient temperature. As Figure 1 shows, an LED's light output can vary by as much as 150% over its operating-current range. In response, a ...28-06-2016
- Design Note 445 Introduction Once relegated to the hinterlands of low cost indicator lights, the LED is again in the spotlight of the lighting world. LED lighting is now ubiquitous, from car headlights to USB-powered lava lamps. Car headlights ...28-06-2016
- The white-LED flasher in Figure 1 offers an alternative approach to a previously published idea ( Reference 1 ). Targeting use in portable appliances and products powered by a single cell, this circuit flashes an LED to provide a highly visible ...23-06-2016
- Valentin Kulikov, Futuro Lighting EDN Introduction This article describes simple constant current driver module with fast PWM input that can be used for driving medium and high power LEDs. The module uses an integrated constant-current output, ...26-02-2016
- R O Ocaya EDN This Design Idea shows a way to drive low-power electronic circuits using a single 1.5 V cell. The design is based on a free-running oscillator that drives a flyback transformer to generate a controllable higher voltage. It can be ...31-01-2016
- John Rice, Texas Instruments LEDs Magazine The non-synchronous, boost, power-conversion topology is often used in LED drivers in instances where the input voltage (VIN) is insufficient to forward bias a series/parallel set of LED strings. This ...23-11-2015
