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DataCell Military - Merlin Equipment
DataCell Military - Merlin Equipment

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... 2.1 Choosing a transformer For the transformer, a transformer with dual secondaries producing between 18vac and 25vac is recommended. One DIYer has used a 2x30vac transformer without issues, but 2x25vac should work best for a wide variety of loads. One can choose a variety of VA ratings and rail vol ...
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... It is observed that the XOR and XNOR outputs sometimes fall in the undefined region of the inverters representing the test equipment. In other words, the output voltage is higher that Vil and lower than Vih. The inverter has Vil = 0.5 V and Vih = 0.6V. Furthermore, the outputs of the circuit under t ...
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... Its Q output (pin 1) goes HIGH which turns ON transistor switch Q4 (BC547) and turns transistor Q3 (2N7000) OFF. The role of Q3 is to allow charge or discharge of capacitor C25 (1uF). The F/F’s output thus switches HIGH which is inverted to LOW by Q4. This LOW turns the clamp transistor Q3 OFF. Now ...
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Custom Remote Annunciator
Custom Remote Annunciator

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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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