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Electrical Engineering : Recent Questions and Answers (Page 59)

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

Opto-isolation amplifier giving no output

First of all, thanks to the community for having such helpful answers here - don't post very often but here's one I could really do some help with. I want...

Asked on 12/13/2020 by nchaud

3 answer

Predicting decay time of a resonant bandpass filter?

In a typical resonant bandpass filter, resonance is set as none at 0 and full at 1, such that the filter rings infinitely at 1 and not at all at...

Asked on 12/13/2020

3 answer

Using 2 laptop power supplies to make plus and minus supply

I have set of M audio AV30 speakers that had a failed power supply (the transformer). I replaced the transformer with the closest thing I could find. ...

Asked on 12/13/2020 by Freddie

0 answer

Help me to understand VOOC fast charging for lithium ion batteries?

I know common VOOC charger have fast charging rate of 18W(9V/2A). But how it possible even current is only 2A. I mean 2A current have only stored charge 2000mAh(2A*1h). How...

Asked on 12/13/2020 by Ridham

1 answer

OpAmp VS Voltage Divider VS Buck Converter (Current Sensor Output)

I'm working on part of a project and I need to build the circuit that reads the current through a phase of a motor using this IC...

Asked on 12/12/2020 by Marcelo Queirós

3 answer

op-amp outputs supply voltage on GND Signal

I am trying to use an op-amp (first time).I know the basic theory of its amplification circuits.To test I am using an Arduino Nano Microcontroller to create a...

Asked on 12/12/2020 by RIJIK

2 answer

Xilinx Vivado: How are inputs/outputs handled that are not in the constraints file?

Assume I have the following constraints file which specifies only one single input:set_property -dict { PACKAGE_PIN J15 IOSTANDARD LVCMOS33 } [get_ports { Switch }];And the following top...

Asked on 12/11/2020 by tschaboo

1 answer

Can eddy current sensors measure through a thin metallic sheet?

I would like to know if it is theoretically and technically possible to measure/detect a metallic object through a thin metal sheet using eddy current sensor. For example copper has...

Asked on 12/11/2020 by Tarti

2 answer

How exactly should I build a smart wall light switch for a smart home

I'm planning to build a smart home system and as you know smart wall light switches are a important part of it. I've been digging around for almost two weeks...

Asked on 12/10/2020 by mostafanfs

2 answer

Low Overhead Constant Current LED Driver

I have a 3V3 rail and want to run an LED with a Vf=3.1V at 10mA with a constant current source. I'm used to circuits like the one below but...

Asked on 12/10/2020 by EasyOhm

2 answer

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