/r/AskElectronics

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How should this little mosfet be pulled up?

4 upvotes • 4b686f61

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Looking for a substitute (or exact) for this variable capacitor (marked 402). It is going inside an mfj-989c HF antenna tuner.

4 upvotes • sparkyboots80

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How to convert a 5v to - 5v signal into 3.3v to 0v?

4 upvotes • Muted-Bad8139

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What are these two Sensors in my lightsaber?

4 upvotes • Whole-Grade7396

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Took apart my Bravia TV. What connector is this?

4 upvotes • zombie343

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What is the purpose of the highlighted section? Application note 104, Linear technology. I am a bit unsure regarding the purpose of the sections highlighted in the image. The explanation in app note is brief. I would appreciate it greatly if someone could comment on it with a simplified explanation.

4 upvotes • fVripple

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Low voltage coming out of board, how to find out what input voltage should be expected?

4 upvotes • pennanbeach

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Which Japanese brand is this micro from? Looks like 6 petals of a flower, Google reverse image search didn't find anything

4 upvotes • Kadano

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I designed this in falstad, i recreated this circuit on a solder board using ceramic capacitors, axial inductors and a bc517 but it didn't work, i tweaked values of components in the simulator, the current ratios between LCR components seems to be optimal. Is there something i missed?

4 upvotes • Max_the-Bear

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Can I replace this broken peizo speaker with this little black one?

4 upvotes • sideswipe1230

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How should this little mosfet be pulled up?	4	4b686f61
Looking for a substitute (or exact) for this variable capacitor (marked 402). It is going inside an mfj-989c HF antenna tuner.	4	sparkyboots80
How to convert a 5v to - 5v signal into 3.3v to 0v?	4	Muted-Bad8139
What are these two Sensors in my lightsaber?	4	Whole-Grade7396
Took apart my Bravia TV. What connector is this?	4	zombie343
What is the purpose of the highlighted section? Application note 104, Linear technology. I am a bit unsure regarding the purpose of the sections highlighted in the image. The explanation in app note is brief. I would appreciate it greatly if someone could comment on it with a simplified explanation.	4	fVripple
Low voltage coming out of board, how to find out what input voltage should be expected?	4	pennanbeach
Which Japanese brand is this micro from? Looks like 6 petals of a flower, Google reverse image search didn't find anything	4	Kadano
I designed this in falstad, i recreated this circuit on a solder board using ceramic capacitors, axial inductors and a bc517 but it didn't work, i tweaked values of components in the simulator, the current ratios between LCR components seems to be optimal. Is there something i missed?	4	Max_the-Bear
Can I replace this broken peizo speaker with this little black one?	4	sideswipe1230