Skip to main content
tlfong01's user avatar
tlfong01's user avatar
tlfong01's user avatar
tlfong01
  • Member for 6 years, 2 months
  • Last seen more than a month ago
  • Hong Kong
31 votes
Accepted

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

24 votes

Why does it take time for electronic scale to measure?

15 votes

GPS taking long time to fix out in the open

13 votes

Help with homemade electromagnet

10 votes

What is back EMF?

9 votes

Sensor to distinguish between different types of pegs on a pegboard

9 votes

Understanding the curves of a MOSFET

7 votes

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

7 votes

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

6 votes

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

6 votes
Accepted

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

5 votes

ULN2803 not working like I expect, or at all

5 votes

How to protect GPIO from back current? Diode?

5 votes

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

4 votes

High Vce(sat) of 2SD1048

4 votes
Accepted

SPI slave randomly missing bits in response

4 votes
Accepted

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

3 votes

Add LED to existing water pump

3 votes

Driving 5V powered relay module from 3V3 powered microcontroller

3 votes

Capacitive moisture sensor not quite working

3 votes

Can I use a ULN2003A IC as many transistor switches?

3 votes
Accepted

Motor Driver keeps dying/frying driving a worm gear motor

3 votes
Accepted

Brushless DC motor with built in controller

2 votes
Accepted

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

2 votes

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

2 votes

Activate 12 V Relay with a 5 V GPIO

2 votes
Accepted

Can RFID read stacked cards?

2 votes

Relation between heat & resistance

2 votes

The issues of common ground with voltmeter and ammeters

2 votes

Load Cell ADC HX711 Alternatives?