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An transconductance (using voltage to control current) electronic component used for switching and amplification. Acronym for Metal-Oxide-Semiconductor Field-Effect Transistor. (from http://en.wikipedia.org/wiki/Transistor)

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Using the falstad.com circut designer I found a simple mosfet switching circut. However, upon constructing it in real life I found that: ~after powering it on the led starts glowing dimly (it … should not glow at all) ~after pushing the button the led brightens up and stay on until the power is cut out (it would be funny, if they st me a triac instead of an mosfet!) What am I doing wrong here and how can I fix it? Do you have any working mosfet switch circuts? Thanks in advance! …
asked Apr 26 '18 by thegamebusterpl