From: Link <li...@pe...> - 2009-04-10 10:06:02
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I want to use n-channel enhancement MOSFETs in my circuits, but they don't work as I'd expect. I modelled the circuit from http://brunningsoftware.co.uk/FET.htm (see attachment). When I hold the push-to-make, the gate pin goes high, and the LED... does absolutely bupkis. I get 160 µA flowing through it, and that's it. Removing the 1k resistor changes absolutely nothing. I need to change the voltage source to about 50 V for the LED to turn on. What gives? My knowledge of electronics is limited (hence why I like KTechlab - it's a great learning utility!), to the point where I don't understand the MOSFET maths enough to be able to provide any more input, so I'm relying on you folks for this. |