EcoLight: Ten Reasons to Make the Switch

ArmandoAzx

This teardown of a current dollar store example reveals that cost-slicing has managed to shave even more off what was already trying like a market saturated with bottom-greenback design. The electrical parts inside this glowing model of cost-chopping consists of one PCB (previously-seen dollar retailer LED bulb examples had two), eleven LEDs, one bridge rectifier, two resistors, and a controller IC. A wirewound resistor apparently additionally serves as a fuse, just in case. IC to see what lurks inside, and the result's shown here. 100 Volts DC that the bridge rectifier and large electrolytic cap current to it, and it’s each low-cost and clever in its personal means. The top half is a giant transistor for chopping the voltage and the bottom half is the straightforward management logic; operation is fast sufficient that no flicker is perceived within the LEDs, and no output smoothing cap is needed. The outcome, of course, is fewer elements and lower cost. Some of chances are you'll recall that again in the early days of LED lighting, bulbs that could final 100,000 hours had been a hot promise. That didn’t happen for quite a lot of causes and the march in direction of being an on a regular basis consumable where price was paramount continued. They work, they’re low-cost, and nearly all the pieces else has been efficiently pried up and tossed out the door.

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