{"product_id":"uln-2003-board","title":"ULN 2003 board","description":"\u003cmeta name=\"description\" content=\"Buy ULN 2003 board online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eULN2003 Stepper Motor Driver Board\u003c\/h1\u003e\n\u003cp\u003eDrive stepper motors and high-current loads effortlessly with the ULN2003 driver board from The Tech Depot, Bengaluru. This compact breakout board integrates the popular ULN2003A Darlington transistor array, providing seven high-voltage, high-current open-collector outputs - ideal for controlling 28BYJ-48 stepper motors, relays, solenoids, LED strips, and other inductive loads directly from microcontrollers like Arduino, ESP32, and Raspberry Pi. Onboard LED indicators for each channel give instant visual feedback of output status. Fast shipping across India with a 7-day warranty on manufacturing defects and dedicated technical support.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eIC Chip\u003c\/td\u003e\n\u003ctd\u003eULN2003A (7-channel Darlington transistor array)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e7 (independent high-current outputs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eOpen-collector Darlington pairs with integrated flyback diodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (Logic)\u003c\/td\u003e\n\u003ctd\u003e3.3V - 5V (TTL\/CMOS compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\/Load Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V - 12V DC (up to 50V max per ULN2003A datasheet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current\u003c\/td\u003e\n\u003ctd\u003e500mA per channel (peak), recommended continuous ~300mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal IC Rating\u003c\/td\u003e\n\u003ctd\u003eUp to 2.5A aggregate across all channels (with thermal considerations)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStepper Motor Connector\u003c\/td\u003e\n\u003ctd\u003e5-pin female header (direct plug for 28BYJ-48 stepper motor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Header\u003c\/td\u003e\n\u003ctd\u003e4-pin or 7-pin male header for microcontroller connections (IN1-IN4 \/ IN1-IN7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED Indicators\u003c\/td\u003e\n\u003ctd\u003e4 or 7 onboard LEDs (one per active channel for status monitoring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlyback Protection\u003c\/td\u003e\n\u003ctd\u003eBuilt-in suppression diodes on each output for inductive load protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003eApproximately 30mm x 35mm (compact form factor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eScrew holes \/ standoff compatible for secure project mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20 degreesC to +70 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino UNO\/Nano\/Mega, ESP8266, ESP32, Raspberry Pi, STM32, PIC, and other 3.3V\/5V logic MCUs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003e28BYJ-48 unipolar stepper motor driving, relay control, solenoid driving, LED array switching\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eMotor Driver \/ Darlington Array Breakout Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal \/ Authentic ULN2003A IC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7 Technical Support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e7 Darlington Pair Outputs:\u003c\/strong\u003e Each channel can sink up to 500mA, making it capable of driving stepper motors, relays, solenoids, lamps, and other medium-power loads that microcontroller GPIO pins cannot handle directly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect 28BYJ-48 Compatibility:\u003c\/strong\u003e The onboard 5-pin connector allows plug-and-play connection to the widely used 28BYJ-48 unipolar stepper motor - no additional wiring or adapters needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Flyback Diodes:\u003c\/strong\u003e Integrated suppression diodes on every output channel protect your circuit from voltage spikes generated by inductive loads such as motors, relays, and solenoids during switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.3V \u0026amp; 5V Logic Compatible:\u003c\/strong\u003e Input pins accept both 3.3V and 5V logic levels, ensuring seamless interfacing with Arduino, ESP32, ESP8266, Raspberry Pi GPIO, STM32, and virtually any popular development board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnboard LED Status Indicators:\u003c\/strong\u003e Individual LEDs on each output channel provide real-time visual confirmation of which outputs are active - invaluable for debugging and monitoring during development.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Breadboard-Friendly:\u003c\/strong\u003e The small PCB footprint fits easily on breadboards, perfboards, or inside project enclosures, and mounting holes allow secure installation in permanent builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Wiring:\u003c\/strong\u003e Connect microcontroller digital pins to the input header, attach your motor or load to the output connector, supply power, and you're ready - minimal external components required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Beyond Stepper Motors:\u003c\/strong\u003e While optimized for stepper motor control, each channel works independently for switching relays, LED strips, buzzers, solenoid valves, DC motors (single direction), and other loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose The Tech Depot?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% authentic ULN2003A IC - sourced from trusted, authorized component distributors to guarantee genuine performance and reliability.\u003c\/li\u003e\n\u003cli\u003e1-5 day shipping from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/li\u003e\n\u003cli\u003eExpert technical support included - our engineering team assists with wiring, code, and integration via email and WhatsApp around the clock.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy ULN 2003 board Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eULN 2003 board\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eULN 2003 board\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eULN 2003 board\u003c\/strong\u003e at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48746574708993,"sku":"TTD-18042","price":180.2,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/23085b5637b895d2797d5761ba414de5.jpg?v=1778107897","url":"https:\/\/techdepot.in\/products\/uln-2003-board","provider":"Tech Depot India","version":"1.0","type":"link"}