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Old 01-18-2009   #2 (permalink)
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Arrow Re: Do you understand this electrical scheme?

Quote:
Originally Posted by tsuwal View Post
I would like to understand the part of the circuit that is inside the red rectangle in the following picture:

overpic.net/viewer.php?file=xhwae5mil75gq8e7pzpyu.jpg

Thanks for your time.
OVERPIC.net Image Viewer

Just looking it over it's the trigger circuit, but I guess you knew that. What exactly do you need to anser about it?

While they call S1 a "silicon power cube", the diagrammatic symbol is that of a transistor. Looks to me like the circuit in the red is using a switch to apply a voltage to the transistor which then closes (switches on) the high-voltage part of the circuit to energize the coil & fire the projectile. This strikes me as analagous to using a relay in order to switch high-voltage/current circuits with low voltage/current circuits.

Hope that helps.


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semantics is not always just pedantic quibbling. ~ douglas r. hofstadter
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