Calculating time when SCR starts up

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The discussion focuses on calculating the time when a Silicon Controlled Rectifier (SCR) starts up in a circuit controlling an electric bell. Key points include the requirement for a gate voltage of 0.7 volts and a minimum gate current of 20 microamperes for the SCR to trigger. Participants clarify the voltage drops across various components, including the potentiometer and diode, and emphasize the need for accurate mathematical expressions to determine the input voltage (Vin) necessary for triggering the SCR. The conversation also touches on the importance of using radians in calculations and resolving discrepancies in previous calculations. Ultimately, the final calculated time for the SCR's set-off is approximately 2.866 milliseconds.
  • #31
It's nice of you to say that!
lol

You are doing it correctly, I hope? Using sin⁻¹ (13.3 / (12√2)) = ...

Yessir!

None of these FP 'shortcuts' that are based on wistful thinking!

LOL!

[/quote]

Many thanks to you and ILS! And anyone else I might be missing who replied :)
 

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