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Q&A How is it possible to perform a open circuit test on a induction motor?

~ In an open circuit test, also known as a no-load test, an induction motor is operated without any mechanical load connected to its shaft. The purpose of this test is to determine the no-load loss...

posted 2y ago by TonyStewart‭  ·  edited 2y ago by TonyStewart‭

Answer
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Q&A Confusion in operation of analog computer

The poteniometers (what you label as "variable resistors") are almost certainly just floating pots. If their ends were permanently connected to power and ground, then they'd be voltage sources, not...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A Testing instrumentation amplifier with differential signal

One of the reasons to follow the advice of your instructor is that page 17 of the datasheet identifies the need for ground return paths for input bias currents. Your initial setup may or may not wo...

posted 2y ago by DSI‭

Answer
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Q&A What does it mean for a signal to have impedance?

$$Z = R + jX $$R is a real resistance that stores energy as heat and temperature rise which depends on the thermodynamic property of thermal resistance which is impacted by an enclosure to get hott...

posted 2y ago by TonyStewart‭  ·  edited 2y ago by TonyStewart‭

Answer
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Q&A Why arc welding does not require high voltage to arc?

gas tubes, SCRs, and welder arcs all have negative incremental resistance. This means when conduction begins, the resistance drops like a crowbar and is sustained until the current drops belo...

posted 2y ago by TonyStewart‭

Answer
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Q&A How can I fix this 4-20 mA current loop to source current that matches current sink on its input?

You are making this way too complicated. Go back to the basic problem definition, which is you want to get a digital reading of the current sunk by a current sink, with the valid range being 4-20 ...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A What is the role of master clock speed on DAC

In protocol I2S we have 3 signal + one none standard master clock(Mentioined by Olin Lathrop): 1.data 2.lrck/fck (frame synchronizer) 3.bck (bit clock) 4.mck/sck (master clock) Question 1: Why we...

2 answers  ·  posted 2y ago by mohammadsdtmnd‭  ·  last activity 2y ago by mohammadsdtmnd‭

Question clock audio DAC
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Q&A Is a current-dependent current source and a current mirror the same thing?

It's not clear that the problem is. It seems you want to interface to this "digital air pressure regulator" via two 4-20 mA current loops. For reading the output, it should be as simple as a 24 V...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A Role of C2 (bypass capacitor)

To properly answer this question, you need to show us a real circuit with a capacitor across the supply. There are various reasons a capacitor across a power supply might make sense. Protecting t...

posted 2y ago by Olin Lathrop‭

Answer
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Q&A Via on pad: acceptable or not?

This can be OK if you consider and address the consequences carefully. It's something I would only do as a last resort. Usually I try to make sure the hole itself is outside the outline of the pa...

posted 3y ago by Olin Lathrop‭

Answer
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Q&A Confusion with Wikipedia article on multivibrator circuit [closed]

A while ago I made a question about the monostable multivibrator .Lets get a picture of it: When switch is closed it enters its unstable state and it eventually returns to the stable state Howe...

0 answers  ·  posted 3y ago by MissMulan‭  ·  closed 3y ago by Olin Lathrop‭

Question transistor voltage multivibrator
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Meta Do we need tags for supply voltages?

I agree that "208VAC" and "230VAC" are too specific to be useful. I tried to edit the post to remove them. There is apparently a bug in the system. While I removed both tags from the post, one o...

posted 3y ago by Olin Lathrop‭  ·  edited 3y ago by Olin Lathrop‭

Answer
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Q&A Asynchronous connection question

Assume we have a channel and send 7-bit data(0100100) asynchronously with 1 parity bit(0).Suppose the start bit is 1.The end bits are in the same logic level with the idle state of the channel(0).H...

2 answers  ·  posted 3y ago by MissMulan‭  ·  edited 2y ago by Lorenzo Donati‭

Question communication serial-communication UART-USART
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Q&A Asynchronous connection question

How does the receiver understand the end bits? It doesn't. The purpose of stop bits (what you seem to be calling "end bits") is to leave a guaranteed gap before the next start bit. The leading e...

posted 3y ago by Olin Lathrop‭

Answer
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Q&A Voltage and Current of capacitor

How do I find the voltage of the capacitor and the current through the capacitor after the switch is closed?

1 answer  ·  posted 4y ago by MissMulan‭  ·  last activity 4y ago by MissMulan‭

Question capacitor voltage current
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Meta React feature guidelines?

I think "dangerous" is pretty clear. It's when doing as recommended can cause significant damage to property or health. For example, recommending to a hobbyist to make a direct line-connected cap...

posted 3y ago by Olin Lathrop‭

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Q&A Division of binary numbers logic circuit

I dont understand how to make a logic circuit which does that job:check if the divisors is greater and equal or less than the most left digits of the divident So think about it. Break it down int...

posted 4y ago by Olin Lathrop‭  ·  edited 4y ago by Olin Lathrop‭

Answer
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Q&A Division of binary numbers logic circuit

You're thinking of a digital comparator, "a hardware electronic device that takes two numbers as input in binary form and determines whether one number is greater than, less than or equal to the ot...

posted 4y ago by JRN‭

Answer
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Q&A Division of binary numbers logic circuit

If we want to divide two numbers I have problem implementing this logic.I am posting 1 images with 2 different steps to the solution. In example a) the most significant digits of the divident >...

2 answers  ·  posted 4y ago by MissMulan‭  ·  edited 2y ago by Lorenzo Donati‭

Question digital-logic arithmetic-circuit
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Q&A Change of pins in monostable multivibrator

The circuit you show doesn't make any sense: Start by examining the steady state condition. In steady state, C1 is effectively an open, so you ignore it. R4 keeps Q1 on. That means the collec...

posted 3y ago by Olin Lathrop‭

Answer
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Q&A Change of pins in monostable multivibrator

Your circuit will make sense if you do two things: significantly increase both R3 and R4 reverse D1 or move it to Q1's base Let's first see the role of the resistances R3 and R4. These are ...

posted 3y ago by Circuit fantasist‭  ·  edited 3y ago by Circuit fantasist‭

Answer
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Q&A Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"?

Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"? Rounding (down, or up, or to the nearest integer) is he mathematical process which discreti...

posted 4y ago by Nick Alexeev‭  ·  edited 4y ago by Nick Alexeev‭

Answer