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  2. ESP32 - Wikipedia

    en.wikipedia.org/wiki/ESP32

    ESP32 is a series of low-cost, low-power system-on-chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth.The ESP32 series employs either a Tensilica Xtensa LX6 microprocessor in both dual-core and single-core variations, an Xtensa LX7 dual-core microprocessor, or a single-core RISC-V microprocessor and includes built-in antenna switches, RF balun, power amplifier, low-noise ...

  3. List of Arduino boards and compatible systems - Wikipedia

    en.wikipedia.org/wiki/List_of_Arduino_boards_and...

    Digital I/O with PWM (pins) Analog input (pins) Analog output pins Arduino Nano ESP32 [3] u-blox NORA-W106 (ESP32-S3) up to 240 MHz minimal 45 mm × 18 mm [ 1.8 in × 0.7 in ] USB-C 3.3 V 16MB 384 512 14 5 8 Arduino Uno WiFi rev 2 [4] ATMEGA4809, NINA-W132 Wi-Fi module from u-blox, ECC608 crypto device 16 MHz Arduino / Genuino

  4. General-purpose input/output - Wikipedia

    en.wikipedia.org/wiki/General-purpose_input/output

    A GPIO pin's state may be exposed to the software developer through one of a number of different interfaces, such as a memory-mapped I/O peripheral, or through dedicated IO port instructions. Some GPIOs have 5 V tolerant inputs: even when the device has a low supply voltage (such as 2 V), the device can accept 5 V without damage.

  5. Pin compatibility - Wikipedia

    en.wikipedia.org/wiki/Pin_compatibility

    This may occur when the device uses a different instruction set, or if the device has a multiplexer attached to a pin (which, for example, may allow the switching of the pin between being driven as GPIO or by an A/D) and that multiplexer selects, by default, a different input source than is selected on the device being replaced.

  6. Arduino - Wikipedia

    en.wikipedia.org/wiki/Arduino

    A minimal Arduino C/C++ program consists of only two functions: [73] setup(): This function is called once when a sketch starts after power-up or reset. It is used to initialize variables, input and output pin modes, and other libraries needed in the sketch. It is analogous to the function main(). [74]

  7. NodeMCU - Wikipedia

    en.wikipedia.org/wiki/NodeMCU

    NodeMCU was created shortly after the ESP8266 came out. On December 30, 2013, Espressif Systems [6] began production of the ESP8266. [12] NodeMCU started on 13 Oct 2014, when Hong committed the first file of nodemcu-firmware to GitHub. [13]

  8. Charlieplexing - Wikipedia

    en.wikipedia.org/wiki/Charlieplexing

    A symmetric layout of Charlieplexed LEDs. On left, 3 pins drive 6 LEDs arranged in a triangle. On right, 4 pins drive 12 LEDs arranged in a tetrahedron.. The Charlieplexing configuration may be viewed as a directed graph, where the drive pins are vertices and the LEDs are directed edges; there is an outward-pointing edge connected from each vertex to each other vertex, hence with n drive pins ...

  9. CPU socket - Wikipedia

    en.wikipedia.org/wiki/CPU_socket

    Willamette core only. Can accept some of Socket 478 CPU with an adapter Socket 495: 2000 Intel Celeron Intel Pentium III: Notebook PGA: 495 1.27 [3] 66–133 MHz Socket 603: 2001 Intel Xeon: Server PGA: 603 1.27 [4] 100–133 MHz 400–533 MT/s Socket 478/ Socket N: 2001 Intel Pentium 4 Intel Celeron Intel Pentium 4 EE Intel Pentium 4 M ...