Raspberry pi Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools.
Raspberry Pi 4 Model B is the latest product in the popular Raspberry Pi range of computers. It offers ground-breaking increases in processor speed, multimedia performance, memory, and connectivity compared to the prior-generation Raspberry Pi 3 Model B+, while retaining backward compatibility and similar power consumption. For the end-user, Raspberry Pi 4 Model B provides desktop performance comparable to entry-level x86 PC systems.
Description
An SD card inserted into the slot on the board acts as the hard drive for the Raspberry Pi. It is powered by USB and the video output can be hooked up to a traditional RCA TV set, a more modern monitor, or even a TV using the HDMI port.
Pi 3B+
It is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people of all ages to explore computing and to learn how to program in languages like Scratch and Python.
GPIO pins
GPIO. Stands for "General Purpose Input/Output." A 40-pin GPIO header is found on all current Raspberry Pi boards. While all GPIO pins offer only digital input or output, PWM can be used (with very little external circuitry - a low-pass-filter) to at least output analog signals. The Pi has two dedicated hardware PWM pins and may further use the other GPIO pins for software PWM.
GPIO is a type of pin found on an integrated circuit that does not have a specific function. ... For example, you can wire an LED to a GPIO and a ground pin on a Raspberry Pi. If a software program tells the GPIO pin to turn on, the LED will light up.
Features
The full specs for the Raspberry Pi 4 include:
>> Processor Broadcom BCM2711, Quad-core
>> Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
>> 2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on model)
> > 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, BLE Gigabit Ethernet
>> Bluetooth 5.0,
>> 2 USB 3.0 ports; 2 USB 2.0 ports.
>> Raspberry Pi standard 40 pin GPIO header (fully backward compatible with previous boards)
>> 2 × micro-HDMI ports (up to 4kp60 supported)
>> 2-lane MIPI DSI display port
>> 2-lane MIPI CSI camera port
>> 4-pole stereo audio and composite video port
>> H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)
>> OpenGL ES 3.0 graphics
>> Micro-SD card slot for loading operating system and data storage
>> 5V DC via USB-C connector (minimum 3A*)
>> 5V DC via GPIO header (minimum 3A*)
>> Power over Ethernet (PoE) enabled (requires separate PoE HAT)
>> Operating temperature: 0 – 50 degrees C ambient
>> Power source: 5 V via MicroUSB or GPIO header
>> Size: 85.60mm × 56.5mm
>> Weight: 45g (1.6 oz)
* A good quality 2.5A power supply can be used if downstream USB peripherals consume less than 500mA in total.