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The change you need to make is to apply a negative voltage to the gate, not a positive one. You must log in or register to reply here. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

What is this circuit? This is different from junction transistors and MOSFETs, both of which need a source of bias voltage at their control terminal before they will conduct. This switch will control dtaasheet transistor switch circuit state on or off. Im only allowed to use 1 transistor but i can use as many diodes, resistors, etc.

2N3370 Datasheet PDF

If the drain circuit is returned to 0V there will be a problem bringing the gate sufficiently negative, because it has to be negative relative to the drain, as well as to the source. I guess resistors are allowed too. Perhaps someone else have got the 2SK49 model. This will happen when the gate switch is ON and the gate-source voltage is negative from the gate voltage supply battery, BT2. That will do nicely. N channel Fet v npn. When the transistor circuit is off, a red led should glow, when the transistor circuit is on, a green led should glow.


Sep 16, 6.

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Sep 16, 1. Articles Top Articles Search resources. I’ve searched on the net but couldn’t locate any. Please post homework questions there.

Can someone please help me with this. I have quite a few of these in my part drawer and also got their datasheet. Click here to register now.

Sep 16, 2. Search Forums Recent Posts. Sep 16, 3.

2N Allegro, 2N Datasheet

I figured out a way to make it work in multisim, although im not entirely sure how its working. This would produce uneven brightness in the LEDs and would not be used in a practical circuit.

Sep 17, 8. But the datasheet for the 2N states the drain saturation current, I DSSis just a fraction of one milliamp. Forums New posts Search forums. By continuing to use this site, you are consenting to our use of cookies. Sep 16, 5. Thread starter eblc Start date Nov 20, In practice, this circuit would destroy the jfet and LED2 For an N channel jfet, it is very rare that the gate ever becomes more positive than either of the other terminals because it is normal to have it reverse biased.


Sep 16, 7. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Last edited by a moderator: Electro Tech is an online community with overmembers who enjoy datawheet about and building electronic circuits, projects and gadgets. After that, you can post your datasehet and our members will help you out.

Even if I could, I wouldn’t, because we don’t give full answers to homework questions. You know that an N-channel JFET needs a negative voltage on the gate relative to the source to turn it OFF, and it will be ON by default when the gate voltage is equal to the source voltage. You said you can use diodes, but no other transistors. I appreciate all your help. Here’s a diagram showing the gate supply battery reversed.

Sep 16, 4. I need a circuit using a ntype jfet so that when I close a switch, a green led lights indicating the transistor is on and then when i open the switch, the green led goes off and a red led comes on indicating the transistor is off.