Showing posts with the label electronics

EFFICIENCY STANDARDS for external power supplies

Focusing on Efficiency The global regulatory environment surrounding the legislation of external power supply efficiency and no-load power draw has rapidly evolved over the past decade since the California Energy Commission (CEC) implemented the first mandatory standard in 2004. With the publication in 2014 of a new set of requirements by the United States Department of Energy (DOE) that took effect in February 2016, the landscape has changed again as regulators further reduce the amount of energy that may be consumed by external power adapters. In Europe, even more stringent requirements, which are currently voluntary, look set to become mandatory Ecodesign rules in the near future. To help our customers stay on top of these continuously evolving global regulations, we have set out to push the energy efficiency initiative ac

Recycle your old CDs into Beautiful LED Lights

Old CDs are probably very common thing to find in our house. The same happened to me when i checked my computer table where i found out most of the CDs in there are useless and just filling up my drawer space. So i decided to reuse them and turn them into suspended LED lights rather than throwing them way “concept of recycling”.  CIRCUIT DIAGRAM: There wasn’t much to discuss about this circuit diagram. There are totally 4 LEDs – 2 Red and 2 Blue. Resistors R1 and R2 are meant to limit the current and prevent the LED’s from getting damaged. And the circuit was powered by a 12v Battery, in case if you need to change the supply voltage make sure you use the appropriate resistors R1 and R2 as well. SETTING UP CD LED LIGHTS: First we have to assemble the above circuit together to place it in the CD’s. Cardboard sheets seems to be a perfect material for assembling the circuit and this can be found widely in our house as well. Cut the sheet in a circle so that

18W + 18W Stereo Hi-Fi Audio Amplifier (TDA2030)

2 x 18W Hi-Fi Stereo Power Amplifier based around two TDA2030 ICs. It has good input sensitivity, low distortion, good operating stability and full protection against overloads and output short-circuits. It can be used as a booster amplifier for existing small systems or to drive a second pair of speakers besides the ones already connected to the system. The board needs a symmetrical power supply of ±18Vdc/3A and can be connected to loads of 8 or 4 Ohm. Large heat sink is required for this circuit. Diagram shown below indicates only left channel. Make two circuits for for stereo version. Picture of the project: 18+18 Watt Hi-Fi Stereo Audio Amplifier Circuit Diagram Circuit Diagram: Diagram Shows Only One Channel Parts: R1 = 22K R2 = 680R R3 = 22K R4 = 1R-1w D1 = 1N4001 D2 = 1N4001 C1 = 1uf-25V C2 = 22uF-25V C3 = 100nF-63V C4 = 100nF-63V C5 = 100uF-25V C6 = 100uF-25V C7 = 220nF-63V IC = TDA2030 If it does not work: Che