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Electrical Engineering : Recent Questions and Answers (Page 33)

Find answers to your questions about Electrical Engineering or help others by answering their Electrical Engineering questions.

What does inverted triangle in this schematic mean?

I'm trying to make this circuit but I'm unable to understand what the inverted triangle is and how to connect them all together. Here is the schematic, what does the...

Asked on 10/29/2021

3 answer

How does this mobile charger work?

I was looking at this mobile charger circuit trying to understand it. I am assuming it's a pwm based power supply (pulsating dc is given as tfr input). What I...

Asked on 10/29/2021 by Prodigy

2 answer

How do I use the Z-input on my oscilloscope (full range of contrast / brightness)?

I guess all scopes are a little different and don't provide any adjustment knobs for the Z-axis input. Mine is a Protek 6502A and it's Z-axis spec saysZ Axis Modulation:Sensitivity:...

Asked on 10/29/2021

1 answer

How to specify UV high brightness LEDs?

I'm trying to find high brightness UV LEDs appropriate for this project: https://www.instructables.com/id/UV-LED-Exposure-Box/ which includes: "The most critical parts of this project are the UV LEDs, you...

Asked on 10/29/2021

1 answer

Custom 25 A mains inrush current limiter design review

I've designed an inrush current limiting circuit and would welcome a review from experts with more experience with this sort of thing. The load will be around 50 x 19...

Asked on 10/29/2021

2 answer

FPC Connector - Matebook X Pro

Please excuse me if this is not the right place to ask this question. I have been looking for a specific ribbon cable (motherboard to LCD board) for my Huawei...

Asked on 10/29/2021

3 answer

Charge transfer in CCD

I have a basic doubt about charge transfer between pixels of a CCD. Let's consider this animation (picture taken from wikipedia): ...

Asked on 10/29/2021

1 answer

Fuse keeps blowing on AC/DC Adapter

Recently I have noticed high freq. screeching noise coming out from my laptop's adaptor. I opened it up and found that it came from somewhere around a diode named egp10a....

Asked on 10/29/2021 by Karel Capek

4 answer

Why does a MOSFET have 2 semiconductor leads?

I have a question on the mosfet construction. Considering a n-channel enhancement type mosfet, it has two n-type regions connected to source and drain terminals. Also there is a p-type...

Asked on 10/29/2021

1 answer

What is Negative Inductance?

I am experimenting with a stripline square spiral inductor in Sonnet and the graph is showing both a positive and negative inductance. What does it mean to have a negative...

Asked on 10/29/2021

2 answer

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