{"product_id":"go-24v-mkr-shield-discontinued","title":"GO-24V MKR Shield [Discontinued]","description":"\u003cp\u003eThe GO-24 is an Arduino MKR shield with 4 digital inputs, 4 digital outputs and 2 analogue inputs - all rated 24V!\u003c\/p\u003e\n\u003cp\u003eNowadays, most common microcontrollers operate with 3.3V logic, while the older classic Arduino UNO uses 5V logic, but sometimes you want to connect your project to 12V or 24V gadgets, which are common in automation and home systems.\u003c\/p\u003e\n\u003cp\u003eOmzlo created the GO-24V MKR shield with 24V tolerant inputs and outputs exactly for this purpose. Full documentation and example code is provided.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: This board requires soldering of the pin headers and terminal blocks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eThe Omzlo GO-24V MKR shield is designed to fit on top of\u003cspan\u003e \u003c\/span\u003eArduino MKR\u003cspan\u003e \u003c\/span\u003ecompatible boards, such as the Arduino MKR Zero. But it really shines as part of an\u003cspan\u003e \u003c\/span\u003eIoT project\u003cspan\u003e \u003c\/span\u003eon top of an Omzlo CANZERO\u003cspan\u003e \u003c\/span\u003enode.\u003c\/p\u003e\n\u003cp\u003eIt features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 digital inputs (0-24V).\u003c\/li\u003e\n\u003cli\u003e4 digital open-drain outputs (0-24V), sinking up to 2A.\u003c\/li\u003e\n\u003cli\u003e2 analogue inputs (0-24V).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe shield also breaks out the GND and VIN pins of the MKR board.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePin mapping\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe following table provides details of the shield input\/output capabilities:\u003c\/p\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eShield connector\u003c\/th\u003e\n\u003cth\u003eArduino MKR Pin\u003c\/th\u003e\n\u003cth\u003eCharacteristics\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 1\u003c\/td\u003e\n\u003ctd\u003eD0\u003c\/td\u003e\n\u003ctd\u003e0-24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 2\u003c\/td\u003e\n\u003ctd\u003eD1\u003c\/td\u003e\n\u003ctd\u003e0-24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 3\u003c\/td\u003e\n\u003ctd\u003eD2\u003c\/td\u003e\n\u003ctd\u003e0-24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput 4\u003c\/td\u003e\n\u003ctd\u003eD3\u003c\/td\u003e\n\u003ctd\u003e0-24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSink 1 (Output)\u003c\/td\u003e\n\u003ctd\u003eD4\u003c\/td\u003e\n\u003ctd\u003e0-24V (max 60V, 3.1A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSink 2 (Output)\u003c\/td\u003e\n\u003ctd\u003eD5\u003c\/td\u003e\n\u003ctd\u003e0-24V (max 60V, 3.1A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSink 3 (Output)\u003c\/td\u003e\n\u003ctd\u003eD6\u003c\/td\u003e\n\u003ctd\u003e0-24V (max 60V, 3.1A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSink 4 (Output)\u003c\/td\u003e\n\u003ctd\u003eD7\u003c\/td\u003e\n\u003ctd\u003e0-24V (max 60V, 3.1A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog in 1\u003c\/td\u003e\n\u003ctd\u003eA0\u003c\/td\u003e\n\u003ctd\u003e0-24V mapped to 0-3.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog in 2\u003c\/td\u003e\n\u003ctd\u003eA1\u003c\/td\u003e\n\u003ctd\u003e0-24V mapped to 0-3.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVIN\u003c\/td\u003e\n\u003ctd\u003eVIN\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e this shield does not feature isolated inputs\/outputs (e.g. using optocouplers) or galvanic isolation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital inputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe digital inputs have the same shifting characteristic as the GPIO of the MCUs they are connected to. For a SAMD21 board like the Arduino MKR Zero or the Omzlo CANZERO, this means that any input below 1V will be considered LOW (0), and any input above 1.8V will be considered as HIGH (1).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe digital outputs are sinking outputs, which means that they are used to switch loads on the low side.\u003c\/p\u003e\n\u003cp\u003eThe sinking outputs are controlled by MOSFETs, which have a comfortable maximum 3.1A current rating. In practice, it's best to keep safely away from those limits. We tested currents up to 1.5A without any issue, for low-side switching power LEDs. Lower currents should also be considered when switching these MOSFETs very rapidly (e.g. through fast PWM).\u003c\/p\u003e\n\u003cp\u003eIf in doubt, please consult the safe operating area of the MOSFET in the datasheet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnalogue inputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnalogue inputs are managed by feeding input voltage in a voltage divider and a buffering op-amp, resulting in a scaled voltage range where 24V corresponds to 3.2V on the analogue input of the Arduino-compatible board (and 24.75V corresponds to 3.3V).\u003c\/p\u003e\n\u003cp\u003eIn terms of accuracy, the voltage divider uses 1% resistors, but the greatest source of inaccuracy can come from the ADC of the MCU itself. It is possible to apply calibration to each board to substantially increase accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePackage contents\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGO-24V Shield\u003c\/li\u003e\n\u003cli\u003eBreakable male 2.54mm pin headers (0.1\")\u003c\/li\u003e\n\u003cli\u003eThree 4-pin 3.5mm terminal blocks (colours may vary)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eResources\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDocumentation and example code\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omzlo","offers":[{"title":"Default Title","offer_id":52217454788896,"sku":"rgx1787258021998","price":9.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0946\/3231\/3120\/files\/go-24v-mkr-shield-discontinued_1.jpg?v=1787258026","url":"https:\/\/www.elmwoodbasket.shop\/products\/go-24v-mkr-shield-discontinued","provider":"My Store","version":"1.0","type":"link"}