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Poster - Technology Supplies
Poster - Technology Supplies

... waits until its full and then releases it all in one go. How much charge depends on the size of the capacitor, which is measured in Farads after physicist Michael Faraday. ...
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... B. Resistance of materials 1. Typical lamp cord- much less than 1 ohm 2. An iron or toaster- resistance of 15 to 20 ohms (low resistance permits large current- which produces considerable heat 3. Inside electrical devices- current regulated by circuit elements called resistors (range from a few ohm ...
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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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