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tlfong01
  • Member for 4 years, 3 months
  • Last seen this week
  • Hong Kong
12 votes

Power a 5V relay from GPIO pins

7 votes

Can Rpi3B+ power two USB SSD drives?

6 votes
Accepted

What is Rpi's I2C Maximum Speed?

6 votes

How can Rpi SPI python read the MFRC522 RFID / NFC module?

6 votes

Rpi3B/Rpi4B ILI9341 / XPT2046 SPI 2.8" Touch TFT LCD Connection / Driver Problem

5 votes

Multiple GPIO Buttons vs Matrix Keypad

5 votes
Accepted

Rpi Reading MCP3008 10 bit ADC Result Problem

5 votes
Accepted

Rpi GPIO pin's High level signal possibly not High enough to switch off the 5V relay problem

5 votes

How to use Rpi python to control PCM1802 24-bit HiFi stereo ADC and MAX4466 microphone amplifier

5 votes
Accepted

How can Rpi Python PWM GPIO pins control and dim LED strips of 1W 350mA?

4 votes

How many serial ports are on the Pi 3?

4 votes
Accepted

Is there a way to connect a DHT22 humidity sensor to a USB Port?

4 votes
Accepted

Is there a python library to allow I2C between Pi (master) and Pico (slave)

3 votes
Accepted

How to check if SPI is enabled and functional on Raspi 3b+?

3 votes
Accepted

How to control unipolar/bipolar stepper/stepping motors such as 28BYJ48 using motor drivers such as L293D

3 votes

Adafruit 9-DOF or other accelerometer/magnetometer/gyroscope sensor for Raspberry PI 2/3 with Windows IoT

3 votes

No audible click from 5V relay when using Raspberry Pi Zero W

3 votes

Can I use the USB connector to transfer plaintext data (via serial console / socket) to a linux PC?

3 votes

Turn a Raspberry Pi into a voltage tester

3 votes
Accepted

Rpi Current Sensing Using ACS712 and INA219

3 votes

More Digital Inputs

3 votes

How to manually control a shake activated lamp using raspberry pi?

3 votes
Accepted

Rpi3 LIRC Library and UART IR Transceiver Setup Problem

3 votes

Can Rpi4B power external / portable USB HDD / SSD?

3 votes

How to tap / tee / fork / stack the Rpi GPIO pins covered / blocked by a HAT / pHAT / bonnet?

3 votes

Rpi freezes every now and then, how to fix it with a watchdog?

3 votes
Accepted

How to read Wiegand serial data? (Rx/Tx)

3 votes
Accepted

Rpi Pico MicroPythpn Controlling TMC2208 / TMC2209 / TMC2225 Stepper Motor Driver Problem

2 votes
Accepted

Rpi UART control IR Remote HDMI switch problem

2 votes

outb() equivalent in Python for GPIO

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