Circuits & Schematics - Light

Subsection: "Light"
  Including:
  Colour Organ   LEDs
Search results: 171 Output: 1-10
  1. Rex Niven
    Driving LEDs at a regulated current from low supply voltages can be difficult because minimal overhead voltage is available for control circuits. A current-mirror architecture is suitable but usually works only with ICs with well-matched ...
    Jan 6, 2025
  2. Fons Janssen
    One option for driving high-brightness LEDs uses the standard stepdown buck converter (Figure 1). The sense resistor, R S , generates a feedback voltage, V FB , that sets the desired LED current, I LED , according to the equation Figure 1. A ...
    Aug 27, 2024
  1. Chau Tran
    This circuit of only a few components is powered by two AA batteries and features a mode that extends its power savings. Imagine a smart light switch which not only automatically turns itself on when it gets dark, but also adjusts its level of ...
    Jul 22, 2024
  2. Vijay Deshpande
    Testing the system Testing was done at various sunlight intensities. For any given sunlight intensity, V PV , I PV , V M , I M , etc., are measured. Figure 5 shows the variation of PV power (P PVON ), converter power (P M ), and total power (P TOT ...
    Jun 10, 2024
  3. Vijay Deshpande
    The PV-pushback-effect with solar panels can control backup power and provide constant light output. Solar day lamps (SDLs) are made by simply connecting an LED array to a solar photovoltaic (PV) panel. SDLs represent a highly cost-effective way of ...
    Jun 6, 2024
  4. Sergi Sánchez
    Using a blue LED can pose problems when available power-supply voltages don't meet or exceed the LED's 3 V forward-voltage drop. This Design Idea shows how to drive a blue LED from a 3 V battery or another power supply. The circuit in ...
    May 3, 2024
  5. Alfredo Saab Steve Logan
    Circuits Supply Light Maxim MAX1685 MAX4162 MAX5035
    As the latest generation of new LEDs achieves higher levels of power and efficiency, use of these devices extends to new areas, such as flashlights and vehicular applications. High-power LEDs are finding use even in ambient lighting, long the sole ...
    Mar 20, 2024
  6. Chau Tran
    Streetlights, emergency lights, and security lights must automatically turn on when it gets dark. You base the control circuit on the resistance of a photoresistor or another LDR (light-dependent resistor) that varies with light intensity. An ...
    Oct 24, 2023
  7. Anthony Smith
    Many portable appliances and other products that must operate from a single cell are restricted to working at very low voltages. It is thus difficult to drive white LEDs that typically have a forward voltage of 3 to 5 V. The ability to flash the ...
    Sep 26, 2023
  8. Stephen Woodward
    Self-powered isolation amplifiers, which need no external isolated power supply, provide versatile and convenient interfaces in many applications that require galvanic isolation of the signal source. Examples of such applications include circuits ...
    Jul 27, 2023