User Floris

13 votes

Accepted

How is it possible to have a 5W transmitter driving 50 ohms with a 12V supply?

rf antenna impedance transmitter

answered Nov 4, 2014 at 5:29

12 votes

Finding a faulty chip that draws too much current

current high-current

answered Jul 29, 2017 at 16:39

11 votes

What can I put a kilowatt into? (Or: help me save my hairdryers)

voltage power batteries amperage testing

answered Jul 1, 2016 at 18:06

9 votes

Accepted

Strange extra frequency in crystal oscillator

clock crystal fft

answered Jul 27, 2016 at 17:07

9 votes

Batteries. Why use 9V?

batteries

answered Aug 10, 2017 at 11:57

6 votes

SMD resistor maximum voltage: is 200V really a limiting factor?

resistors maximum-ratings

answered Apr 2, 2016 at 17:10

5 votes

Accepted

Wavelengths blocked by a certain metal mesh

gsm physics microwave

answered Aug 22, 2014 at 3:24

4 votes

Transistor Circuit question

transistors kirchhoffs-laws

answered Dec 28, 2014 at 23:16

2 votes

Why does I²C only have pull-up resistors (interview question)?

microcontroller i2c pullup

answered May 8, 2015 at 18:40

2 votes

What if there are an odd number of twists in a twisted pair cable?

ethernet twisted-pair

answered Nov 23, 2015 at 20:33

2 votes

Accepted

About induced current

electromagnetism

answered Jun 30, 2015 at 14:44

1 vote

How to determine the correct graph for induced current

electromagnetism

answered Jul 6, 2015 at 5:16

1 vote

Linear accelerometer on a rotating platform

sensor accelerometer physics gyro

answered Nov 4, 2015 at 16:27

1 vote

MOSFET transistor

transistors mosfet

answered May 19, 2015 at 18:55

1 vote

Long 24V DC cable not working

current dc cables

answered Jun 19, 2015 at 23:54

1 vote

Accepted

Doubt on induced voltage

electromagnetism

answered Jun 21, 2015 at 2:44

1 vote

Accepted

Can't send a signal to a NOR chip

digital-logic

answered May 1, 2014 at 22:42

1 vote

Batteries with same voltage but different number of plates

batteries specifications

answered Aug 4, 2014 at 14:20

1 vote

What applications require isolated transformers?

transformer

answered Aug 11, 2014 at 18:17

1 vote

Difference between bit rate and baud rate?

signal-processing

answered Jan 25, 2017 at 14:58

1 vote

How does the current travel in Bipolar Junction Transistor (BJT)?

transistors bjt bipolar

answered May 19, 2017 at 21:46

1 vote

What makes a good soldering station

equipment soldering-iron-station

answered Jul 11, 2017 at 17:33

0 votes

Detecting chess pieces on the board

rfid sensing

answered Mar 6, 2021 at 13:35

0 votes

Purpose of pullup resistor in BJT LED driver circuit

resistors bjt ttl open-collector

answered Jun 26, 2014 at 3:33

0 votes

Darlington-pair transistor power amplifier for cd-player

power amplifier darlington

answered Apr 20, 2016 at 10:51

0 votes

Why does the Collector-Emitter voltage need to be ≥ 0.3 V?

transistors bjt

answered Nov 27, 2016 at 22:18

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26 Answers

How is it possible to have a 5W transmitter driving 50 ohms with a 12V supply?

Finding a faulty chip that draws too much current

What can I put a kilowatt into? (Or: help me save my hairdryers)

Strange extra frequency in crystal oscillator

Batteries. Why use 9V?

SMD resistor maximum voltage: is 200V really a limiting factor?

Wavelengths blocked by a certain metal mesh

Transistor Circuit question

Why does I²C only have pull-up resistors (interview question)?

What if there are an odd number of twists in a twisted pair cable?

About induced current

How to determine the correct graph for induced current

Linear accelerometer on a rotating platform

MOSFET transistor

Long 24V DC cable not working

Doubt on induced voltage

Can't send a signal to a NOR chip

Batteries with same voltage but different number of plates

What applications require isolated transformers?

Difference between bit rate and baud rate?

How does the current travel in Bipolar Junction Transistor (BJT)?

What makes a good soldering station

Detecting chess pieces on the board

Purpose of pullup resistor in BJT LED driver circuit

Darlington-pair transistor power amplifier for cd-player

Why does the Collector-Emitter voltage need to be ≥ 0.3 V?