Contents
What is the GPIO header?
Basic GPIO The header provides 17 Pins that can be configured as inputs and outputs. By default they are all configured as inputs except GPIO 14 & 15. In order to use these pins you must tell the system whether they are inputs or outputs.
What is a 40 pin GPIO header for?
GPIO ports allow you to control your own electronic circuits directly from the Pi. The 40-pin GPIO header on the Raspberry Pi 2 and 3 provides access to a total of 17 GPIO ports that can be controlled from programs you write in Python or other languages.
How many GPIO header pins are available in Raspberry Pi?
Raspberry Pi models Of the 40 pins, 26 are GPIO pins and the others are power or ground pins (plus two ID EEPROM pins, which you should not play with unless you know your stuff!).
What is GPIO header used for?
GPIO pins are standard general-purpose pins that can be used for turning external devices, such as an LED, on or off. 5V and 3V3 pins are used to supply 5V and 3.3V power to external components. I2C pins are used for connecting and hardware communication purposes with I2C compatible external modules.
What is GPIO mode?
From Wikipedia, the free encyclopedia. A general-purpose input/output (GPIO) is an uncommitted digital signal pin on an integrated circuit or electronic circuit board which may be used as an input or output, or both, and is controllable by the user at runtime. GPIOs have no predefined purpose and are unused by default.
How much RAM does a Raspberry Pi 3 have?
1 GB
The Raspberry Pi 3 has 1 GB of RAM in the B and B+ models, and 512 MB of RAM in the A+ model. The Raspberry Pi Zero and Zero W have 512 MB of RAM. The Raspberry Pi 4 is available with 2, 4 or 8 GB of RAM.
What GPIO means?
general-purpose input/output
Important Peripheral: GPIO Ports A GPIO (general-purpose input/output) port handles both incoming and outgoing digital signals. As an input port, it can be used to communicate to the CPU the ON/OFF signals received from switches, or the digital readings received from sensors.
Are LEDs analog or digital?
An LED is an example of a digital output component. It can either be on or off, and there is no value in-between.
How many pins does the Raspberry Pi GPIO header provide?
In order to avoid damaging your Pi you need to be sure what pins you are connecting to other hardware and that your program is referring to the correct pins. The header provides 5V on Pin 2 and 3.3V on Pin 1. The 3.3V supply is limited to 50mA.
What kind of input does the GPIO header do?
The GPIO header provides the following power and interface options : 3.3V (on 2 pins) 5V (on 2 pins) Ground (on 8 pins) General purpose input and output. PWM (pulse width modulation) I2C. I2S.
What are the names of the GPIO pins?
The labels above are the names of the pins on the Broadcom system chip to which the pin is physically connected. Much of the confusion around the GPIO is due to these labels, their relationship to the Broadcom labels and how they are referred to in your programs.
What was the revision of the Raspberry Pi GPIO?
Revision 2.0 saw some slight changes to Pin 3, Pin 5 and Pin 11. These changes carried over to the new 40-pin design so anything that worked on a Revision 2.0 model should work on the newer models. This is where it all began.