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English: This is a diagram for connecting an LED to the GPIO header of an Raspberry Pi. The original schematic was made by Software11, corrections were made by Toble Miner, and a revised vector version was made by Alex Rosenberg35.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
The Raspberry Pi 3 Model A+ was launched in November 2018 as a similar board to the first Model A. It has a 1.4 GHz 64-bit quad-core processor, with 2.4 GHz dual-band and 5 GHz wireless LAN & Bluetooth 4.2. It also has a 40-pin GPIO header, 512 MB of DDR2 RAM, is powered by 5V of DC power via microUSB.
Header pins Debug connection Number of pads USB connector Other connectors Flash size GPIO pins ADC pins Buttons Other features Image Pico [16] Raspberry Pi Ltd 51×21 40+3 via headers 6 micro-USB 2 MB 26 3 BOOTSEL Pico W [17] Raspberry Pi Ltd 51×21 40+3 via headers 6 micro-USB 2 MB 26 3 BOOTSEL Wi-Fi, Bluetooth: XIAO RP2040 [18] Seeed Studio ...
Fully Arduino compatible board, that fits perfectly on a Raspberry Pi, and can be programmed through the Raspberry Pi's serial interface. It also breaks out the Raspberry Pi's SPI and I²C interfaces, or can be used as a stand-alone Arduino when powered with the external power header. Romeo 2012 [108] ATmega328 DFRobot [109]
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For example, Schmitt-trigger inputs, high-current output drivers, optical isolators, or combinations of these, may be used to buffer and condition the GPIO signals and to protect board circuitry. Also, higher-level functions are sometimes implemented, such as input debounce , input signal edge detection, and pulse-width modulation (PWM) output.