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<title>Unicorn HAT Mini at Raspberry Pi GPIO Pinout</title>
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<meta name="description" content="17x7 RGB LED Matrix" />
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<meta name="twitter:title" content="Unicorn HAT Mini at Raspberry Pi GPIO Pinout">
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<meta name="twitter:description" content="17x7 RGB LED Matrix">
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<body class="board">
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<div id="container">
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<h1 class="logo"><a title="Raspberry Pi GPIO Pinout home" href="/"><img src="/resources/pinout-logo.png" width="45" height="45" />Raspberry Pi Pinout</a></h1>
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<div id="leftcolumn">
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<nav id="gpio">
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<div id="pinbase"></div>
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<ul class="bottom">
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<li class="pin1 pow3v3 overlay-power"><a href="/pinout/3v3_power" title=""><span class="default"><span class="phys">1</span> 3v3 Power</span><span class="pin"></span></a></li>
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<li class="pin3 gpio i2c"><a href="/pinout/pin3_gpio2" title="Wiring Pi pin 8"><span class="default"><span class="phys">3</span> <span class="name">GPIO 2</span> <small>(I2C1 SDA)</small></span><span class="pin"></span></a></li>
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<li class="pin5 gpio i2c"><a href="/pinout/pin5_gpio3" title="Wiring Pi pin 9"><span class="default"><span class="phys">5</span> <span class="name">GPIO 3</span> <small>(I2C1 SCL)</small></span><span class="pin"></span></a></li>
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<li class="pin7 gpio"><a href="/pinout/pin7_gpio4" title="Wiring Pi pin 7"><span class="default"><span class="phys">7</span> <span class="name">GPIO 4</span> <small>(GPCLK0)</small></span><span class="pin"></span></a></li>
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<li class="pin9 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">9</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin11 gpio"><a href="/pinout/pin11_gpio17" title="Wiring Pi pin 0"><span class="default"><span class="phys">11</span> <span class="name">GPIO 17</span></span><span class="pin"></span></a></li>
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<li class="pin13 gpio"><a href="/pinout/pin13_gpio27" title="Wiring Pi pin 2"><span class="default"><span class="phys">13</span> <span class="name">GPIO 27</span></span><span class="pin"></span></a></li>
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<li class="pin15 gpio"><a href="/pinout/pin15_gpio22" title="Wiring Pi pin 3"><span class="default"><span class="phys">15</span> <span class="name">GPIO 22</span></span><span class="pin"></span></a></li>
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<li class="pin17 pow3v3"><a href="/pinout/3v3_power" title=""><span class="default"><span class="phys">17</span> 3v3 Power</span><span class="pin"></span></a></li>
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<li class="pin19 gpio spi overlay-pin"><a href="/pinout/pin19_gpio10" title="Wiring Pi pin 12"><span class="default"><span class="phys">19</span> <span class="name">GPIO 10</span> <small>(SPI0 MOSI)</small></span><span class="pin"></span></a></li>
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<li class="pin21 gpio spi"><a href="/pinout/pin21_gpio9" title="Wiring Pi pin 13"><span class="default"><span class="phys">21</span> <span class="name">GPIO 9</span> <small>(SPI0 MISO)</small></span><span class="pin"></span></a></li>
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<li class="pin23 gpio spi overlay-pin"><a href="/pinout/pin23_gpio11" title="Wiring Pi pin 14"><span class="default"><span class="phys">23</span> <span class="name">GPIO 11</span> <small>(SPI0 SCLK)</small></span><span class="pin"></span></a></li>
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<li class="pin25 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">25</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin27 gpio i2c"><a href="/pinout/pin27_gpio0" title="Wiring Pi pin 30"><span class="default"><span class="phys">27</span> <span class="name">GPIO 0</span> <small>(EEPROM SDA)</small></span><span class="pin"></span></a></li>
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<li class="pin29 gpio overlay-pin"><a href="/pinout/pin29_gpio5" title="Wiring Pi pin 21"><span class="default"><span class="phys">29</span> <span class="name">GPIO 5</span> <small>(Button A)</small></span><span class="pin"></span></a></li>
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<li class="pin31 gpio overlay-pin"><a href="/pinout/pin31_gpio6" title="Wiring Pi pin 22"><span class="default"><span class="phys">31</span> <span class="name">GPIO 6</span> <small>(Button B)</small></span><span class="pin"></span></a></li>
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<li class="pin33 gpio"><a href="/pinout/pin33_gpio13" title="Wiring Pi pin 23"><span class="default"><span class="phys">33</span> <span class="name">GPIO 13</span> <small>(PWM1)</small></span><span class="pin"></span></a></li>
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<li class="pin35 gpio pcm"><a href="/pinout/pin35_gpio19" title="Wiring Pi pin 24"><span class="default"><span class="phys">35</span> <span class="name">GPIO 19</span> <small>(PCM FS)</small></span><span class="pin"></span></a></li>
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<li class="pin37 gpio"><a href="/pinout/pin37_gpio26" title="Wiring Pi pin 25"><span class="default"><span class="phys">37</span> <span class="name">GPIO 26</span></span><span class="pin"></span></a></li>
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<li class="pin39 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">39</span> Ground</span><span class="pin"></span></a></li>
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</ul>
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<ul class="top">
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<li class="pin2 pow5v overlay-power"><a href="/pinout/5v_power" title=""><span class="default"><span class="phys">2</span> 5v Power</span><span class="pin"></span></a></li>
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<li class="pin4 pow5v"><a href="/pinout/5v_power" title=""><span class="default"><span class="phys">4</span> 5v Power</span><span class="pin"></span></a></li>
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<li class="pin6 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">6</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin8 gpio uart"><a href="/pinout/pin8_gpio14" title="Wiring Pi pin 15"><span class="default"><span class="phys">8</span> <span class="name">GPIO 14</span> <small>(UART TX)</small></span><span class="pin"></span></a></li>
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<li class="pin10 gpio uart"><a href="/pinout/pin10_gpio15" title="Wiring Pi pin 16"><span class="default"><span class="phys">10</span> <span class="name">GPIO 15</span> <small>(UART RX)</small></span><span class="pin"></span></a></li>
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<li class="pin12 gpio pcm"><a href="/pinout/pin12_gpio18" title="Wiring Pi pin 1"><span class="default"><span class="phys">12</span> <span class="name">GPIO 18</span> <small>(PCM CLK)</small></span><span class="pin"></span></a></li>
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<li class="pin14 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">14</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin16 gpio"><a href="/pinout/pin16_gpio23" title="Wiring Pi pin 4"><span class="default"><span class="phys">16</span> <span class="name">GPIO 23</span></span><span class="pin"></span></a></li>
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<li class="pin18 gpio overlay-pin"><a href="/pinout/pin18_gpio24" title="Wiring Pi pin 5"><span class="default"><span class="phys">18</span> <span class="name">GPIO 24</span> <small>(Button Y)</small></span><span class="pin"></span></a></li>
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<li class="pin20 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">20</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin22 gpio"><a href="/pinout/pin22_gpio25" title="Wiring Pi pin 6"><span class="default"><span class="phys">22</span> <span class="name">GPIO 25</span></span><span class="pin"></span></a></li>
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<li class="pin24 gpio spi overlay-pin"><a href="/pinout/pin24_gpio8" title="Wiring Pi pin 10"><span class="default"><span class="phys">24</span> <span class="name">GPIO 8</span> <small>(SPI0 CE0)</small></span><span class="pin"></span></a></li>
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<li class="pin26 gpio spi overlay-pin"><a href="/pinout/pin26_gpio7" title="Wiring Pi pin 11"><span class="default"><span class="phys">26</span> <span class="name">GPIO 7</span> <small>(SPI0 CE1)</small></span><span class="pin"></span></a></li>
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<li class="pin28 gpio i2c"><a href="/pinout/pin28_gpio1" title="Wiring Pi pin 31"><span class="default"><span class="phys">28</span> <span class="name">GPIO 1</span> <small>(EEPROM SCL)</small></span><span class="pin"></span></a></li>
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<li class="pin30 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">30</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin32 gpio"><a href="/pinout/pin32_gpio12" title="Wiring Pi pin 26"><span class="default"><span class="phys">32</span> <span class="name">GPIO 12</span> <small>(PWM0)</small></span><span class="pin"></span></a></li>
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<li class="pin34 gnd overlay-ground"><a href="/pinout/ground" title=""><span class="default"><span class="phys">34</span> Ground</span><span class="pin"></span></a></li>
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<li class="pin36 gpio overlay-pin"><a href="/pinout/pin36_gpio16" title="Wiring Pi pin 27"><span class="default"><span class="phys">36</span> <span class="name">GPIO 16</span> <small>(Button X)</small></span><span class="pin"></span></a></li>
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<li class="pin38 gpio pcm"><a href="/pinout/pin38_gpio20" title="Wiring Pi pin 28"><span class="default"><span class="phys">38</span> <span class="name">GPIO 20</span> <small>(PCM DIN)</small></span><span class="pin"></span></a></li>
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<li class="pin40 gpio pcm"><a href="/pinout/pin40_gpio21" title="Wiring Pi pin 29"><span class="default"><span class="phys">40</span> <span class="name">GPIO 21</span> <small>(PCM DOUT)</small></span><span class="pin"></span></a></li>
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</ul>
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</nav>
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<div id="legend">
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<div>
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<h2>Legend</h2>
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<p>Orientate your Pi with the GPIO on the right and the HDMI port(s) on the left.</p>
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<ul>
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<li class="gpio">
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<a href="/pinout/wiringpi" title="GPIO (General Purpose IO)">
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<span class="default"></span>
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<span class="pin"></span> GPIO <small>(General Purpose IO)</small>
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</a>
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</li>
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<li class="spi">
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<a href="/pinout/spi" title="SPI (Serial Peripheral Interface)">
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<span class="default"></span>
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<span class="pin"></span> SPI <small>(Serial Peripheral Interface)</small>
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</a>
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</li>
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<li class="i2c">
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<a href="/pinout/i2c" title="I2C (Inter-integrated Circuit)">
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<span class="default"></span>
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<span class="pin"></span> I<sup>2</sup>C <small>(Inter-integrated Circuit)</small>
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</a>
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</li>
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<li class="uart">
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<a href="/pinout/uart" title="UART (Universal Asynchronous Receiver/Transmitter)">
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<span class="default"></span>
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<span class="pin"></span> UART <small>(Universal Asynchronous Receiver/Transmitter)</small>
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</a>
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</li>
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<li class="pcm">
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<a href="/pinout/pcm" title="PCM (Pulse Code Modulation)">
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<span class="default"></span>
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<span class="pin"></span> PCM <small>(Pulse Code Modulation)</small>
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</a>
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</li>
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<li class="gnd">
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<a href="/pinout/ground" title="Ground">
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<span class="default"></span>
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<span class="pin"></span> Ground
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</a>
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</li>
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<li class="pow5v">
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<a href="/pinout/5v_power" title="5v (Power)">
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<span class="default"></span>
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<span class="pin"></span> 5v <small>(Power)</small>
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</a>
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</li>
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<li class="pow3v3">
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<a href="/pinout/3v3_power" title="3.3v (Power)">
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<span class="default"></span>
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<span class="pin"></span> 3.3v <small>(Power)</small>
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</a>
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</li>
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</ul>
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</div>
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<img src="/resources/pi-orientation.png" width="196" height="297" />
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</div>
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</div>
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<div id="content">
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<div id="interfaces">
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<ul>
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<li><a href="/pinout/gpclk">GPCLK</a></li><li><a href="/pinout/1_wire">1-WIRE</a></li><li><a href="/pinout/3v3_power">3v3 Power</a></li><li><a href="/pinout/pcm">PCM</a></li><li><a href="/pinout/ground">Ground</a></li><li><a href="/pinout/spi">SPI</a></li><li><a href="/pinout/wiringpi">WiringPi</a></li><li><a href="/pinout/jtag">JTAG</a></li><li><a href="/pinout/5v_power">5v Power</a></li><li><a href="/pinout/sdio">SDIO</a></li><li><a href="/pinout/uart">UART</a></li><li><a href="/pinout/pwm">PWM</a></li><li><a href="/pinout/i2c">I2C</a></li><li><a href="/pinout/dpi">DPI</a></li>
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</ul>
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</div>
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<div id="crumbtrail"><p><a href="/">Home</a> » <a href="/boards">Boards</a> » <a href="/boards#manufacturer=Pimoroni">Pimoroni</a></p></div>
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<div id="featured">
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<ul>
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</ul>
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</div>
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<article class="page_unicorn_hat_mini"><h1>Unicorn HAT Mini</h1>
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<p>Unicorn HAT Mini is a 17x7 matrix of RGB LEDs that can be controlled, both in terms of colour and brightness, to display animations, text, simple images, and more. The four tactile buttons add tonnes of utility to control the colour or brightness of the LEDs, or as controls for simple games, or whatever else you like.</p>
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<h2>Features</h2>
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<ul>
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<li>17x7 matrix of RGB LEDs (119 total)</li>
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<li>Individual colour/brightness control of each LED</li>
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<li>Holtek HT16D35A LED matrix driver chip (x2)</li>
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<li>Four tactile buttons</li>
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<li>Fully-assembled (no soldering required)</li>
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<li>Compatible with all 40-pin header Raspberry Pi models</li>
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<li>Python library</li>
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</ul>
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<table class="details"><tr><td><h2>Details</h2><ul>
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<li>Made by <a href="/boards#manufacturer=Pimoroni">Pimoroni</a></li>
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<li>40 pin header</li>
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<li>Needs 5v and 3v3 power</li>
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<li>Uses 8 GPIO pins</li>
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<li>Communication over SPI</li>
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<li><a href="https://shop.pimoroni.com/products/unicorn-hat-mini">More Information</a></li>
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<li><a href="https://github.com/pimoroni/unicornhatmini-python">GitHub Repository</a></li>
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<li><a href="https://shop.pimoroni.com/products/unicorn-hat-mini">Buy Now</a></li>
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</ul></td><td><img loading="lazy" src="/resources/boards/pimoroni-unicorn-hat-mini.png" alt="Unicorn HAT Mini" /></td></tr></table></article>
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<div id="lang">
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<div class="footer">
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<p>Spotted an error, want to add your board's pinout? <a href="https://github.com/pinout-xyz/Pinout.xyz">Contribute to Pinout.xyz at GitHub</a></p>
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<p>Part of <a href="https://www.gadgetoid.com">gadgetoid.com</a>. Maintained by <a href="https://fosstodon.org/@gadgetoid">@Gadgetoid@fosstodon.org</a>.</p>
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<p>Help make Pinout.xyz better- please sponsor me at <a href="https://ko-fi.com/gadgetoid">Ko-Fi</a>, <a href="https://github.com/sponsors/Gadgetoid">GitHub</a> or <a href="https://www.patreon.com/gadgetoid">Patreon</a></p>
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