Find a downloadable version of this story in pdf format at the end of the story. With the rising costs of energy and increasing governmental requirements for high efficiency lighting, the high ...
This LED DC voltage indicator circuit is a voltmeter, rather than simply a battery tester. As such it may measure voltages as low as 3V. It utilizes venerable LM741 operational amplifiers applied as ...
LEDs are finding their way into more products than ever before. Automotive lighting, TV backlights and tablets are just a few applications that require multiple LEDs. Driving a large number of LEDs ...
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