Movatterモバイル変換

Question 1

5votes

4answers

435views

Simple current source with bjt

I want to learn how to design a simple current source using a BJT.I found this picture on another site (https://www.wellpcb.com/blog/pcb-projects/constant-current-source/?utm_source=chatgpt.com), but ...

cosmin

51

asked2 days ago

Question 2

4votes

2answers

256views

How will current flow in this 120 Vdc circuit when various switches are closed? (homework)

Answer to 2 is D and to 4 is B. I'm having trouble understanding the logic behind these answers.For Q2: How will closing switch #4 prevent lamp from lighting up? Wont current just flow through both ...

Douge Mrdouge

41

askedOct 17 at 23:52

Question 3

4votes

4answers

129views

Difference between the two ways to state KVL

I am reading LINEAR CIRCUIT ANALYSIS by DeCarlo and Lin.The books states KVL in two ways. I wanted to ask if the second way offers extra functionality or simplifies some abstractions. Or it is just ...

Pranstein

41

askedSep 25 at 15:44

Question 4

0votes

2answers

163views

Is there really any safety concern (beyond the obvious), regarding putting 240vac mains into a basic potential divider that is 210k Ohms?

I have been perplexed recently with regards to people on a forum, stating that it is unsafe to put 240vac directly into a basic potential divider. The divider was literally 210k ohms, with 3 resistors....

Cheesus Toast

213

askedJul 24 at 12:39

Question 5

1vote

1answer

65views

Looking for some very basic, or maybe advanced details of how to wire and configure a 12vdc horn siren

I have purchased a 12vdc horn siren:https://www.amazon.co.uk/dp/B0CHM41B54?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1(I hope that does not get flagged as spam! If it does then I do not really know ...

Cheesus Toast

213

askedJul 22 at 11:06

Question 6

0votes

1answer

52views

Squeezy bottle battery equivalency question [closed]

If a squeezy bottle of water is high-volume and lower-pressure is the equivalent of that in electricity high-amps and low-volts?

leeand00

259

askedMay 30 at 15:48

Question 7

1vote

2answers

134views

Path of current in a DC circuit

This is more a basic circuit question than specific to transistors. So if a high enough voltage is supplied to the base of the transistor, the path between the collector and emitter is open. Thus ...

user529812

21

askedApr 27 at 15:40

Question 8

1vote

2answers

187views

Constant current with sine pulse [closed]

I'm trying to make constant current with a sine pulse as an assignment from my project supervisor, the problem is I really can't imagine what a constant current that has a sine pulse at all, it just ...

17 Trịnh Hữu Phúc

85

askedApr 6 at 7:23

Question 9

2votes

2answers

167views

Conducting anti-series diodes in LTspice

Consider this simple LTspice simulation: two diodes in anti-series, supplied by a 20 V 10 Hz sine generator with a 1 kΩ series resistor. I expected the K node voltage to be always about 0 V. Instead, ...

Isacco

315

askedApr 3 at 19:08

Question 10

11votes

8answers

2kviews

Putting an Ammeter in Parallel with a Wire but Still Having Series-Resistors

I am currently studying EE and am still very early on in my studies. In one of my principles class, my professors showed us the following circuit:simulate this circuit – Schematic created using ...

dvx2718

379

askedMar 6 at 1:25

Question 11

0votes

4answers

211views

Electric potential in an open circuit

I've been learning Electronics from scratch and have a few misconceptions. I don't understand why in this circuit point B is at the same potential as point A. It stands to reason that there is no ...

user529812

21

askedMar 1 at 5:36

Question 12

1vote

3answers

140views

How can the equivalent resistance of this RLC tank circuit be 18 Ω?

I was trying to resolve the following problem:A 6.8 kΩ resistor, a 7 mH coil, and a 0.02 uF capacitor are inparallel across a 17 kHz ac source. The coil's internal resistance,RW, is 30 Ω.The ...

Chizu

11

askedFeb 15 at 12:14

Question 13

4votes

4answers

742views

Help me understand BJTs better. Resistance of Base Emitter on BJT

From my understanding, bjts will have a diode from the emitter to the base. I was measuring the resistance of a BJT and found that the resistance between the emitter and base was about 500kohms when ...

MATHAINTMATHING

111

askedFeb 4 at 15:52

Question 14

1vote

1answer

118views

I2C SSD1306: single vs double transaction

Based on answers to my previous post - I have a question about basic I2C transactions.If a basic transaction has the following structure:startchip addressbytes to chipstopI am wondering if ...

K_T

641

askedJan 14 at 9:21

Question 15

1vote

3answers

786views

Op-amp voltage follower basic understanding

First of all following experiment with a simulation:I have a basic question to the voltage follower. Normally a voltage follower is constructed the way of the top circuit in the image. And this ...

Isaac Yuki

21

askedNov 9, 2024 at 18:41

Movatterモバイル変換

Stack Exchange Network

Questions tagged [basic]

Simple current source with bjt

How will current flow in this 120 Vdc circuit when various switches are closed? (homework)

Difference between the two ways to state KVL

Is there really any safety concern (beyond the obvious), regarding putting 240vac mains into a basic potential divider that is 210k Ohms?

Looking for some very basic, or maybe advanced details of how to wire and configure a 12vdc horn siren

Squeezy bottle battery equivalency question [closed]

Path of current in a DC circuit

Constant current with sine pulse [closed]

Conducting anti-series diodes in LTspice

Putting an Ammeter in Parallel with a Wire but Still Having Series-Resistors

Electric potential in an open circuit

How can the equivalent resistance of this RLC tank circuit be 18 Ω?

Help me understand BJTs better. Resistance of Base Emitter on BJT

I2C SSD1306: single vs double transaction

Op-amp voltage follower basic understanding

Hot Network Questions

Subscribe to RSS