User drtechno

5 votes

Wet Sponge or Brass Sponge for solder tip cleaning?

answered May 4, 2018 at 7:52

4 votes

Accepted

Which electronic switch to use with 5V as triggering signal and 12 V as actual signal?

answered Apr 22, 2018 at 17:30

4 votes

Accepted

Voltage regulator with zener diode

answered May 2, 2018 at 16:48

4 votes

Accepted

Can acetone be used on electronics?

answered Jan 19, 2018 at 19:46

3 votes

What is the purpose of a master-slave flip-flop?

answered Jan 22, 2018 at 14:51

3 votes

What's the purpose of these two diodes in this circuit?

answered Apr 18, 2018 at 15:49

3 votes

Is CAT5 cable good enough for RS-485 vs "true" RS-485 cable

answered Dec 19, 2017 at 19:30

3 votes

Why on earth are o-scopes earth referenced?

answered Dec 19, 2017 at 18:19

3 votes

Tube cathode biasing with CCS

answered Dec 21, 2017 at 15:58

3 votes

My PCB manufacturer only requires eagle board file, and not a gerber file is it fine to go about getting the board fabricated with him?

answered Jan 11, 2018 at 17:33

3 votes

What is this component? Marked R5

answered May 20, 2019 at 6:45

2 votes

analysis of BJT PNP type - why they can use voltage divider?

answered May 26, 2019 at 13:57

2 votes

MAX 485 performance

answered May 19, 2019 at 13:26

2 votes

Accepted

Identifying an SMD Tantalum Capacitor

answered Jan 19, 2018 at 21:31

2 votes

Finding the open circuit voltage

answered May 15, 2018 at 15:25

1 vote

Accepted

Shielded cable, to ground or not, in amplifier

answered May 2, 2018 at 12:18

1 vote

Powering a Fan with Raspberry Pi

answered May 15, 2018 at 14:59

1 vote

Excessive noise in amplifier circuit when switching from DC power supply to AC-DC adapter

answered May 4, 2018 at 8:27

1 vote

Why is my MCP4822 DAC not outputting 0 V?

answered Apr 22, 2018 at 10:14

1 vote

Accepted

Glitches from wirewound potentiometer

answered May 15, 2018 at 21:41

1 vote

Why do we use a diac for triggering a triac?

answered May 19, 2018 at 8:46

1 vote

Why is Bob Smith termination for Ethernet recommended if it's wrong?

answered May 24, 2018 at 16:02

1 vote

pull up or pull down resistor for optocoupler

answered May 29, 2018 at 17:04

1 vote

latching relay with kill switch

answered Jun 11, 2018 at 17:32

1 vote

PLC hardware interface for BCD input

answered May 9, 2019 at 7:20

1 vote

Is placing a diode in conduction path to ground OK?

answered Apr 21, 2018 at 9:16

1 vote

Audio output referenced to Vcc

answered Apr 21, 2018 at 18:35

1 vote

MOSFET always slightly on (with Pulldown) and other strange behaviour

answered Apr 22, 2018 at 18:50

1 vote

Why does a real world capacitor behave like an inductor at frequencies above its self-resonant frequency?

answered Apr 23, 2018 at 1:40

1 vote

Start/ stop 5v motor from headphones jack

answered Apr 30, 2018 at 10:10

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89 Answers

Wet Sponge or Brass Sponge for solder tip cleaning?

Which electronic switch to use with 5V as triggering signal and 12 V as actual signal?

Voltage regulator with zener diode

Can acetone be used on electronics?

What is the purpose of a master-slave flip-flop?

What's the purpose of these two diodes in this circuit?

Is CAT5 cable good enough for RS-485 vs "true" RS-485 cable

Why on earth are o-scopes earth referenced?

Tube cathode biasing with CCS

My PCB manufacturer only requires eagle board file, and not a gerber file is it fine to go about getting the board fabricated with him?

What is this component? Marked R5

analysis of BJT PNP type - why they can use voltage divider?

MAX 485 performance

Identifying an SMD Tantalum Capacitor

Finding the open circuit voltage

Shielded cable, to ground or not, in amplifier

Powering a Fan with Raspberry Pi

Excessive noise in amplifier circuit when switching from DC power supply to AC-DC adapter

Why is my MCP4822 DAC not outputting 0 V?

Glitches from wirewound potentiometer

Why do we use a diac for triggering a triac?

Why is Bob Smith termination for Ethernet recommended if it's wrong?

pull up or pull down resistor for optocoupler

latching relay with kill switch

PLC hardware interface for BCD input

Is placing a diode in conduction path to ground OK?

Audio output referenced to Vcc

MOSFET always slightly on (with Pulldown) and other strange behaviour

Why does a real world capacitor behave like an inductor at frequencies above its self-resonant frequency?

Start/ stop 5v motor from headphones jack