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Electrical Engineering : Recent Questions and Answers (Page 44)

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

Why do we need an isolation transformer to connect an oscilloscope?

My professor always insists that I provide power to an oscilloscope thorough an isolation transformer. What is the necessity of this? What is the risk if I don't connect it?...

Asked on 02/06/2021 by noufal

7 answer

What type of touch button is this?

There's a touch button which has a spring on the PCB.Is it capacitive?How does it work?Do I need a special circuit to read touch events?...

Asked on 02/05/2021 by Berker Işık

2 answer

DC motor with motor driver included

I'm trying to make a kit for my students for online schooling next semester. On one of the modules, I want to teach them how to control a DC motor...

Asked on 02/05/2021 by Jason Easton

2 answer

USB005 Infineon dongle schematic

Does anyone have a schematic for the usb005 Infineon dongle?We need to program exactly Infineon IC's, and I would like to understand is there any special features, or we...

Asked on 02/04/2021 by Alexander Panov

0 answer

Voltage comparator - how to get a stable voltage reference from a battery

I'm trying to build a circuit which will be used to monitor the voltage of Li-ion battery. The voltage comparator I'm using is LM393. Since the whole circuit will be...

Asked on 02/04/2021 by user8703143

5 answer

HDMI/USB Powered Lighting

Alright so a little vague title but here it goes. I'm interested in powering some 5v LED strips with an HDMI cable. I have no idea if this is even...

Asked on 02/03/2021 by Dustin Rogers

1 answer

What's the difference between PCIe linkup and card present?

In linux log, I can see link up and Card present, these two kinds of messages. What's their difference? Card present means only detected the device but no link up...

Asked on 02/03/2021 by GreenTea

1 answer

Frequency of signal

I have a signal like $sin(2t)$. The frequency of this signal is $f=frac{1}{pi}$, but I am confused here because this $pi$ equals 3.14 or 180 degrees if...

Asked on 02/02/2021 by Kerem Saruhan

2 answer

Delay in turning on two different start buttons in Star/Delta starter on PLC

Currently I'm working on a university project based on Star/Delta Starter on PLC.I wrote program using LD, that switches on the circuit with a motor rotating forward (of course...

Asked on 02/02/2021 by Marcin Jędrzejczyk

1 answer

GPS patch antenna pcb design

could you please review my layout? It's the top side where the antenna is actually placed. It's bottom side, here I've placed...

Asked on 02/02/2021 by Denis Jelesniak

0 answer

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