![]() Arduino Mega 2560 projects list in PDF offline downloadable.Arduino Complete Projects List PDF Downloadable.Huge List of tutorials & Components based resources.Here you'll see the analog values from all eight independent I/O (Y0-Y7) read and printed out once a second. The selectMuxPin function sets the S0, S1, and S2 pinsĪfter uploading the sketch, open your serial monitor and set the baud rate to 9600. Int inputValue = analogRead(zInput) // and read Z SelectMuxPin(pin) // Select one at a time PinMode(zInput, INPUT) // Set up Z as an input Serial.begin(9600) // Initialize the serial port SparkFun Multiplexer Breakout - 8-Channel(74HC4051) v10 This sketch demonstrates how to use the SparkFun Multiplexerīreakout - 8 Channel (74HC4051) to drive eight outputs using If this is your first time using Arduino, please review our tutorial on installing the Arduino IDE.If you have not previously installed an Arduino library, please check out our installation guide. ![]() Note: This example assumes you are using the latest version of the Arduino IDE on your desktop. "X" means it doesn't matter what the logic level of the pin is (because it will be trumped by the enable pin). EĪssuming the mux is powered at 5V, "L," for "low", is any voltage between 0 and about 2V and "H" - "high" - is any voltage between around 3 and 5V. The function table below shows how those pins work together to select the I/O. The select pins (S2-S0), in addition to the enable pin ( E), control which (if any) of the eight independent I/O pins (Y0-Y7) are connected to the common pin (Z). Selectable I/O to be routed to common pin Negative supply voltage (Jumpered to ground by default) Select inputs, S2 is the msb and S0 is the lsb The table below summarizes each pin and its function. Both sides include supply and ground connections (V CC, V EE, GND). The other side provides access to all eight independent I/O's (Y0-Y7). One half of the board breaks out the control signals ( E, S0-S2) and common input/output (Z). If the subjects below sound foreign to you, consider browsing through that tutorial before continuing on. There are a few subjects you should be familiar with before diving into multiplexing, though. ![]() Muxes are a great tool for electronics users of all experience levels - anyone who needs to multiply their project's pin count. Arduino Example: Input - Circuit and an Arduino sketch explaining how to use the board to read eight analog voltage-producing photocells.Arduino Example: Output - An Arduino circuit and example code demonstrating how to use the multiplexer to drive eight LEDs.Board Assembly - Tips and tricks for soldering headers or wires to your breakout and mounting it into your project.74HC4051 Breakout Overview - A quick introduction to the workings of the 74HC4051 and the extra features of the breakout board. ![]() The tutorial is split into the following sections, which you can navigate through using the bar on the right. Included in the tutorial are a pair of Arduino examples, which demonstrate how to use the mux for both digital output and analog input. This tutorial covers everything you should need to assemble the Multiplexer Breakout then wire it and integrate it into your project. The routing of common signal to independent I/O is set by digitally controlling three select lines, which can be set either high or low into one of eight binary combinations. The 74HC4051 can function as either a multiplexer or a demultiplexer, and it features eight channels of selectable inputs/outputs. Similarly, a demultiplexer routes any number of selectable inputs to a single common output. It routes a common input signal to any number of separate outputs. A multiplexer, commonly abbreviated down to "mux", is an electronically-actuated switch, which can turn one signal into many. ![]()
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