User tlfong01

24 votes

Accepted

How to properly use a relay module with JD-VCC from Arduino/Raspberry?

answered Jul 3, 2020 at 6:30

24 votes

Why does it take time for electronic scale to measure?

answered May 20, 2021 at 11:20

15 votes

GPS taking long time to fix out in the open

answered Sep 3, 2020 at 5:05

13 votes

Help with homemade electromagnet

answered Apr 30, 2021 at 6:58

10 votes

What is back EMF?

answered Apr 27, 2021 at 8:28

9 votes

Sensor to distinguish between different types of pegs on a pegboard

answered Sep 30, 2020 at 0:48

8 votes

Understanding the curves of a MOSFET

answered Mar 10, 2021 at 9:00

7 votes

How can I use a 2N2222 transistor as a temperature sensor?

answered Oct 4, 2020 at 3:28

7 votes

What are the two sensors doing in the automatic bread production line?

answered Aug 2, 2020 at 6:04

6 votes

Do the MCP23S17 GPIO pins need protection against latch up ESD within this circuit?

answered Jul 30, 2020 at 9:25

5 votes

How to protect GPIO from back current? Diode?

answered Jul 10, 2020 at 5:26

5 votes

How to use motor drivers with H-bridge and PWM input, to control direction and speed of DC motors?

answered Jul 17, 2020 at 5:11

5 votes

Accepted

What is the difference between 2N7000 and 2N7002 MOSFETs?

answered Mar 28, 2021 at 7:29

5 votes

ULN2803 not working like I expect, or at all

answered Apr 12, 2021 at 3:58

4 votes

Accepted

What's the voltage used to power LEDs inside an LED light bulb?

answered Jan 22, 2021 at 6:17

4 votes

High Vce(sat) of 2SD1048

answered Jul 22, 2020 at 5:26

4 votes

Accepted

SPI slave randomly missing bits in response

answered Aug 7, 2020 at 3:29

3 votes

Driving 5V powered relay module from 3V3 powered microcontroller

answered Jul 21, 2020 at 3:42

3 votes

Capacitive moisture sensor not quite working

answered Sep 25, 2020 at 4:32

3 votes

Can I use a ULN2003A IC as many transistor switches?

answered Sep 25, 2020 at 8:24

3 votes

Add LED to existing water pump

answered Jan 12, 2021 at 4:40

3 votes

Accepted

Motor Driver keeps dying/frying driving a worm gear motor

answered May 12, 2021 at 7:59

3 votes

Accepted

Brushless DC motor with built in controller

answered Oct 13, 2021 at 11:17

2 votes

Accepted

ADS1115 measuring body resistance has a noisy output, how to fix it?

answered Jun 7, 2021 at 1:21

2 votes

Difference between h-bridge, dual half bridge and quad half bridge

answered May 23, 2021 at 14:02

2 votes

Activate 12 V Relay with a 5 V GPIO

answered May 1, 2021 at 14:12

2 votes

Turn an LED off when there is 3V input

answered Jan 13, 2021 at 9:45

2 votes

Help with piezoelectric circuit

answered Jan 23, 2021 at 11:56

2 votes

How exactly does a basic EMF sensor work?

answered Oct 25, 2020 at 9:58

2 votes

How can I increase the output current to make it sufficient for relay module?

answered Oct 14, 2020 at 3:23

Stack Exchange Network

105 Answers

How to properly use a relay module with JD-VCC from Arduino/Raspberry?

Why does it take time for electronic scale to measure?

GPS taking long time to fix out in the open

Help with homemade electromagnet

What is back EMF?

Sensor to distinguish between different types of pegs on a pegboard

Understanding the curves of a MOSFET

How can I use a 2N2222 transistor as a temperature sensor?

What are the two sensors doing in the automatic bread production line?

Do the MCP23S17 GPIO pins need protection against latch up ESD within this circuit?

How to protect GPIO from back current? Diode?

How to use motor drivers with H-bridge and PWM input, to control direction and speed of DC motors?

What is the difference between 2N7000 and 2N7002 MOSFETs?

ULN2803 not working like I expect, or at all

What's the voltage used to power LEDs inside an LED light bulb?

High Vce(sat) of 2SD1048

SPI slave randomly missing bits in response

Driving 5V powered relay module from 3V3 powered microcontroller

Capacitive moisture sensor not quite working

Can I use a ULN2003A IC as many transistor switches?

Add LED to existing water pump

Motor Driver keeps dying/frying driving a worm gear motor

Brushless DC motor with built in controller

ADS1115 measuring body resistance has a noisy output, how to fix it?

Difference between h-bridge, dual half bridge and quad half bridge

Activate 12 V Relay with a 5 V GPIO

Turn an LED off when there is 3V input

Help with piezoelectric circuit

How exactly does a basic EMF sensor work?

How can I increase the output current to make it sufficient for relay module?