USB charger / port
Wall charger · USB-A · 5.1 V 2.4 A · D+ and D− shorted (BC1.2 dedicated charging port)
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Typical part: 5 V 2.4 A USB-A wall charger
Pins
- USB-A port
Ratings and limits
| Output | 5.1 V, 2.4 A max |
|---|---|
| Behaviour above the limit | constant-current, the voltage drops |
| D+ / D− | D+ and D− shorted (BC1.2 dedicated charging port) |
How to use it
Powers 5 V gadgets through a USB-A cable. Laptop ports supply only 0.5 A (USB 2.0) unless they are charging ports.
Lessons and builds that use it
- Interrupts and debouncing
- Watchdog timer
- SPI bus: MAX7219 display
- I²C sensor: accelerometer tilt
- I²C sensor: temperature, humidity, pressure
- PWM actuator: hobby servo
- PWM actuator: DC motor through a MOSFET
- Monitoring a supply rail with the ADC
- Sensor-to-cloud signal pipeline
- USB cable voltage drop
- Detecting USB plug-in with an ESP32
- Blink: your first sketch
- Analog in, PWM out
- Light sensor with an ESP32