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A Charlieplexed digital clock which controls 90 LEDs with 10 pins of a PIC 16C54 microcontroller.. Charlieplexing (also known as tristate multiplexing, reduced pin-count LED multiplexing, complementary LED drive and crossplexing) is a technique for accessing a large number of LEDs, switches, micro-capacitors or other I/O entities, using relatively few tri-state logic wires from a microcontroller.
100-pin: printer SDRAM and printer ROM (e.g., PostScript) 168-pin: SDR SDRAM sometimes used for FPM/EDO DRAM in workstations or servers, may be 3.3 or 5 V; 184-pin: DDR SDRAM; 200-pin: FPM/EDO DRAM in some Sun workstations and servers; 240-pin: DDR2 SDRAM, DDR3 SDRAM and FB-DIMM DRAM; 278-pin: HP high density SDRAM; 288-pin: DDR4 SDRAM and DDR5 ...
LED: There is a built-in LED driven by digital pin 13. When the pin is high value, the LED is on, when the pin is low, it is off. VIN: The input voltage to the Arduino/Genuino board when it is using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin ...
Arduino (/ ɑː r ˈ d w iː n oʊ /) is an Italian open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices.
The Arduino Nano is an open-source breadboard-friendly microcontroller board based on the Microchip ATmega328P microcontroller (MCU) and developed by Arduino.cc and initially released in 2008. It offers the same connectivity and specs of the Arduino Uno board in a smaller form factor.
RESET pin to 0 V and V CC to 0 V. V CC is set to 4.5–5.5 V. Wait 60 μs, and RESET is set to 11.5–12.5 V. Wait more than 310 μs. [2] Set XA1:XA0:BS1:DATA = 100 1000 0000, pulse XTAL1 for at least 150 ns, pulse WR to zero. This starts the chip erase. Wait until RDY/BSY (PD1) goes high.
In more recent times, the Direct Stream Digital sound encoding method was introduced, which uses a generalized form of pulse-width modulation called pulse-density modulation, at a high enough sampling rate (typically in the order of MHz) to cover the whole acoustic frequencies range with sufficient fidelity.
Microcontrollers configured as sub devices may have hardware support for generating interrupt signals to themselves when data words are received or overflow occurs in a receive FIFO buffer, [6] and may also set up an interrupt routine when their chip select input line is pulled low or high.