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A Simple Bar Graph Pressure Display
A Simple Bar Graph Pressure Display

... arrangement of 6 green, 2 yellow, and 2 red LEDs, which can serve as an early warning of excessive filter degradation. Amplifier Design: The dual op amp shown in Figure 2 was chosen because it operates well in applications where the common-mode input is near ground. It also features operation from a ...
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... In Sept. of 1964, researchers affiliated with the JPL space program investigated the potential use of a film scanner system, which used the SNX-100 LED as a light source and an LS-400 silicon planar photosensor as the light sensor (Fig. 3). A camera-film processor, which had been designed for spacec ...
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... C. Parallel Circuits  Parallel Circuits  current travels in multiple paths • one break doesn’t stop flow  current varies in different branches • takes path of least resistance • “bigger” light would be dimmer  each device receives the total voltage • no change when lights are added ...
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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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