{"product_id":"really-large-size-7-segment-display-with-spi-interface-8-channel-spi-relay-board","title":"Really Large Size 7 Segment Display with SPI Interface – 8 Channel SPI Relay Board","description":"\u003cp\u003eThis is an SPI Interface multichannel relay board for high voltage AC or low voltage DC loads. It is ideal for controlling LEDs lights, coffee machines, fans, pumps, or other high-voltage electrical appliances. The board also breaks out the SPI header, so controlling other boards is still possible. Each relay can handle current up to 7A @ 250V AC\/30V DC. This 8 x channel board is mainly designed for AC loads, but it can also drive DC loads, screw terminals on each channel enable the easy interface of the AC load, and each point is marked as AC-Live and AC Neutral. Refer to the connection diagram for the interface. The project consists of 8 x 12V relays with load capacity 7A @ 250V AC,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eULN2803\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e8 channel relay driver,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e74HC595\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSPI to 8 output, 5V regulator\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e7805,\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003epower LED, screw terminals for loads and AC input, header connector for SPI input and output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPI Interface:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e6-pin header CN11 is provided for data input and CN10 connector is the SPI output that can be interfaced with multiple boards.\u003c\/p\u003e\n\u003ch3\u003eControlling Large Size 7 Segment Display (Display size Approx. 8 Feet x 4 Feet)\u003c\/h3\u003e\n\u003cp\u003eWe have created and tested a large-size 7-segment display with this board and an Arduino. Arduino example code is available as a download. Wiring between Arduino vs SPI 8 channel board as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1:5V DC Output (200mA Maximum) \u0026gt;\u0026gt;\u003cstrong\u003eArduino 5V DC\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePin 2:SR\/SRCLK\/SH-CP (74HC595 Pin 11) \u0026gt;\u0026gt;\u003cstrong\u003eArduino Digital Pin D13\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePin 3: RCLK\/ST-CP (74HC595 Pin 12) \u0026gt;\u0026gt;\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eArduino Digital Pin D12\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePin 4: SDI\/DS\/SER (74HC595 Pin 14) \u0026gt;\u0026gt;\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eArduino Digital Pin D11\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePin 5: GND \u0026gt;\u0026gt;\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eArduino GND\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePin 6: GND \u0026gt;\u0026gt;\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNot Connected\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eArduino Code Credits\u003c\/strong\u003e:\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.learnerswings.com\/\"\u003ehttp:\/\/www.learnerswings.com\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEach segment is made using 20W LED Batten (LED Tube Light) with Dimensions 113.5 x 2.8 x 6.8 cm, which works with 230V AC supply, user may use a smaller batten.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe project is tested with a single 7-segment display, but the user may use multiple displays with multiple boards, and use SPI outputs for other boards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnections for 7 Segments + DP\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCN2 Load 1 = Segment a\u003c\/li\u003e\n\u003cli\u003eCN3 Load 2 = Segment b\u003c\/li\u003e\n\u003cli\u003eCN4 Load 3 = Segment c\u003c\/li\u003e\n\u003cli\u003eCN5 Load 4 = Segment d\u003c\/li\u003e\n\u003cli\u003eCN6 Load 5 = Segment e\u003c\/li\u003e\n\u003cli\u003eCN7 Load 6 = Segment f\u003c\/li\u003e\n\u003cli\u003eCN8 Load 7 = Segment g\u003c\/li\u003e\n\u003cli\u003eCN9 Load 8 = Segment DP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSPI In CN11 Connections\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1:5V DC Output (200mA Maximum)\u003c\/li\u003e\n\u003cli\u003ePin 2:SR\/SRCLK\/SH-CP (74HC595 Pin 11)\u003c\/li\u003e\n\u003cli\u003ePin 3: RCLK\/ST-CP (74HC595 Pin 12)\u003c\/li\u003e\n\u003cli\u003ePin 4: SDI\/DS\/SER (74HC595 Pin 14)\u003c\/li\u003e\n\u003cli\u003ePin 5: GND\u003c\/li\u003e\n\u003cli\u003ePin 6: GND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSPI Output CN10 Connections\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1:5V DC Output (200mA Maximum)\u003c\/li\u003e\n\u003cli\u003ePin 2:SR\/SRCLK\/SH-CP (74HC595 Pin 11)\u003c\/li\u003e\n\u003cli\u003ePin 3: RCLK\/ST-CP (74HC595 Pin 12)\u003c\/li\u003e\n\u003cli\u003ePin 4: SDO (74HC595 Pin 9)\u003c\/li\u003e\n\u003cli\u003ePin 5: GND\u003c\/li\u003e\n\u003cli\u003ePin 6: GND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAC 230V Input CN1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1 AC Live In\u003c\/li\u003e\n\u003cli\u003ePin 2 AC Neutral In\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAC Loads – 8 Channel (CN2, CN3, CN4, CN5, CN6, CN7, CN8, CN9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1 AC Live Output\u003c\/li\u003e\n\u003cli\u003ePin 2 AC Neutral Output\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnector CN13\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin 1 5V DC Output Maximum Load 200mA\u003c\/li\u003e\n\u003cli\u003ePin 2 GND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply Input – CN12\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePin1 VCC 12V DC (CN12)\u003c\/li\u003e\n\u003cli\u003ePin2 GND (CN12)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnector CN12 (Optional Connector, do not Install read Note 1 for more info)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Supply 12V DC\u003c\/li\u003e\n\u003cli\u003eCurrent Consumption 400mA Approx. when All Relays are ON (Each Relay 50mA)\u003c\/li\u003e\n\u003cli\u003eEasy SPI Interface using Header Connector\u003c\/li\u003e\n\u003cli\u003eSPI Output for Multiple board interface\u003c\/li\u003e\n\u003cli\u003ePower LED\u003c\/li\u003e\n\u003cli\u003e8 Channel\u003c\/li\u003e\n\u003cli\u003eScrew Terminals for Loads and AC input\u003c\/li\u003e\n\u003cli\u003e4 x 4.2mm Mounting Holes\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 137.16 x 47.94mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47222897705132,"sku":"B134","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/C113.jpg?v=1789559805","url":"https:\/\/dotfry.com\/products\/really-large-size-7-segment-display-with-spi-interface-8-channel-spi-relay-board","provider":"dotfry","version":"1.0","type":"link"}