All Questions
Tagged with electrical-engineering electronics
24
questions
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88
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Error code in the automatic door system
The automatic door lock system malfunctioned due to an electrical surge. Currently, the door is closed but the screen shows the door open. We opened the door by pulling the motor handle and putting ...
1
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0
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17
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Failed in upload firmware to esp32
I'm having an issue when uploading code to my ESP32. Previously, I had configured the partition scheme to 'minimal,' and I was able to upload code without any problems. However, after I fixed my ...
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3
answers
75
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What does 12CC refer to when talking about voltage?
Is it 12V with a connector?
For example in the data sheet here: https://www.hydraulicmegastore.com/product/vcf12nc12cc/
Is this related in any way? (A DMP-12CC connector cable)
https://www.monacor.com/...
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18
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Tunable phase delay for RF modulation
I've been trying to understand if there's a way to create two RF signals at the same frequency with a fixed, tunable phase delay. The goal is for one to trigger an RF-modulated laser and the other an ...
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1
answer
47
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Converting RMS to Maximum Power
If I have a sinusoidal voltage signal of amplitude $V_m$ driving a resistance $R$, what is the relationship between the RMS power $P_{rms}$ and the maximum power $P_{max}$ delivered to the resistance?
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-1
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1
answer
129
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Solving a common emitter amplifier problem
My work is posted along with the question. I received help in office hours and this small signal equivalent was derived. I was told to use the formulas in the pictures to derive the voltage gain and ...
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15
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what is the problem with j1000 drive?
I have problem in the drive-J1000, not running , shows F 9.50 on display , just twinkling here is a video
https://drive.google.com/file/d/1JasqdFWffqOWf1wKko-XR6xYs1OKAzdu/view?usp=sharing
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66
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How to send a TTL trigger signal remotely
Sorry if this is a dumb question, but I am an undergrad intern working on a semi-independent project in a lab, and no one here can really help me with this.
I am trying to control a lab instrument ...
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1
answer
68
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Motor that plugs directly into wall outlet
I am looking to drive a disk at relatively low speeds (9rpm) and somewhat high torque (not sure on exact numbers, 100+ in-lb.) I am looking for a motor that can plug directly into the wall and just ...
0
votes
1
answer
1k
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Control Systems: 3rd order system project [duplicate]
I'm in need of help finding a third-order or higher system in which I can derive a transfer function. We have a class project in which we need to find a real-life example of the system that equates to ...
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25
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Generation of Electrostatic induction
I need to generate a 500 volt electrostatic charge. How can I do this? I don't have a Van de Graaff generator. What are some practical suggestions?
Basically I want to do experiment in which I need to ...
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32
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Voltage drop on amplifier signal after LED switches on
Circuit above shows my design for amplifying PIR sensor signal, which I then feed to Arduino and based off this signal I switch a LED on.
Both, the LED and PIR sensor, are on the same voltage rail (9V)...
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0
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1
answer
58
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How to Supply two different DC voltages using High Current
I'm trying to function a 12V stepper motor(>2.5A) and five 6V servos(>3A). Are there any reliable circuits that can output both these voltages and a high output current since there will be some ...
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26
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Is fiber to computer(without the use of LAN cables in between) possible?? Are any further developments getting carried out towards this goal?
All of us know well that the fiber to home(FTTH) connections are a trend nowadays. Every nation is planning to replace the existing metal wires with optical fiber cables. But we also see that the ...
3
votes
1
answer
102
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USB sound on PC when plugging laptop charger into the socket [closed]
Sometimes I hear my PC making the USB - connected device sound when I plug in my laptop charger into the socket.
By USB connected device I mean the sound that it usually makes when I connect something ...
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