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H I G H P O W E R L E D s & C O N T R O L G E A R
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... One of the most important features of High Brightness LEDs is the pureness of the emitted light. If three High Brightness LEDs in green, blue and red are switched on at the same time, these three LEDs together produce the white light. If the single currents of the three LEDs are well regulated, all ...
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... generally noisy. Some spikes load the current. Alternatively, a temporary over voltage might occur creating either common mode or differential noise. Such high frequency signals may be demodulated by the current sensing device, resulting in an error in the current measurement. Consequently, for powe ...
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... Thus power taken from the supply is that much necessary for supplying the losses of both the transformers and there is very small loss in the control circuit. While conducting this test, the primaries of the two identical transformers are connected in parallel across the supply V1. While the seconda ...
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... A grid-tied solar array may be a few panels or many in series, and may range from a few 12 volt panels to high voltage multi-panel arrays for grid-tied systems. Grid-tied systems can go as high as 1000 VDC, while off-grid battery systems are typically 12, 24 or 48V. Higher voltage systems (over 48V) ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.
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