{"title":"New Arrivals","description":"\u003cp\u003eThe latest electronics components added to Mcustore, newest first. Find new Arduino and ESP32 boards, sensors, displays and modules, all priced in PKR with delivery across Pakistan and cash on delivery available.\u003c\/p\u003e","products":[{"product_id":"esp32-s3-devkitc-1-development-board","title":"ESP32-S3-DevKitC-1 Development Board | Buy in Pakistan — Official Espressif IoT \u0026 AI Dev Kit","description":"\u003ch2\u003eESP32-S3-DevKitC-1 Development Board — Official Espressif Dev Kit\u003c\/h2\u003e\n\u003cp\u003eLooking for the best ESP32-S3 development board for your next IoT, AI, or wireless project? 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Outputs CO2 concentration data via UART or analog signal for easy integration into your projects.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMeasures CO2 concentration in the range of 400 – 5000 ppm (varies by model)\u003c\/li\u003e\n\u003cli\u003eHigh accuracy with automatic baseline correction (ABC)\u003c\/li\u003e\n\u003cli\u003eDual output: UART (serial) and analog voltage output\u003c\/li\u003e\n\u003cli\u003eFast warm-up time and stable long-term performance\u003c\/li\u003e\n\u003cli\u003eOn-board status LED indicator\u003c\/li\u003e\n\u003cli\u003eWide operating voltage: 4.5V – 5.5V\u003c\/li\u003e\n\u003cli\u003eCompact form factor with mounting holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIndoor air quality (IAQ) monitoring systems\u003c\/li\u003e\n\u003cli\u003eHVAC automation and ventilation control\u003c\/li\u003e\n\u003cli\u003eSmart home and IoT air quality sensors\u003c\/li\u003e\n\u003cli\u003eGreenhouse and grow room CO2 monitoring\u003c\/li\u003e\n\u003cli\u003eSchool and office air quality displays\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePin Description\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVCC\u003c\/strong\u003e – 4.5V to 5.5V power supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e – Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTX \/ RX\u003c\/strong\u003e – UART serial communication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAOUT\u003c\/strong\u003e – Analog output (0V – 2V proportional to CO2 level)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWorks with Arduino Uno, Nano, Mega, ESP8266, ESP32, STM32, and Raspberry Pi via UART. Ideal for DIY air quality monitors and environmental data loggers.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":47132987654316,"sku":null,"price":8500.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/0214\/4940\/files\/co2sensor.jpg?v=1788594900"},{"product_id":"arduino-rpm-sensor-rotational-speed-detector","title":"Arduino RPM Sensor – Rotational Speed Detector Module","description":"\u003ch2\u003eArduino RPM Sensor – Rotational Speed Detector Module\u003c\/h2\u003e\u003cp\u003eThis Hall Effect \/ IR-based RPM Sensor Module measures the rotational speed of motors, fans, wheels, and other rotating machinery. It outputs a digital pulse signal for every revolution, making it simple to calculate RPM using a microcontroller's interrupt pin. Compatible with Arduino, ESP32, ESP8266, Raspberry Pi, and other development boards.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDetects rotational speed (RPM) via Hall Effect or IR slotted optocoupler (depending on variant)\u003c\/li\u003e\n\u003cli\u003eDigital pulse output — one pulse per revolution (or per slot\/magnet count)\u003c\/li\u003e\n\u003cli\u003eOn-board LM393 comparator for clean, stable digital signal\u003c\/li\u003e\n\u003cli\u003eSensitivity adjustable via on-board potentiometer\u003c\/li\u003e\n\u003cli\u003eSignal indicator LED for visual feedback\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 3.3V – 5V (compatible with 3.3V and 5V MCUs)\u003c\/li\u003e\n\u003cli\u003eCompact PCB with mounting holes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMotor speed monitoring and closed-loop PID control\u003c\/li\u003e\n\u003cli\u003eFan and pump RPM measurement\u003c\/li\u003e\n\u003cli\u003eConveyor belt and wheel speed detection\u003c\/li\u003e\n\u003cli\u003eTachometer \/ speedometer projects\u003c\/li\u003e\n\u003cli\u003eEncoder-based position and velocity feedback\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePin Description\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVCC\u003c\/strong\u003e – 3.3V to 5V power supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e – Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDO\u003c\/strong\u003e – Digital output pulse signal (connect to interrupt pin on MCU)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAO\u003c\/strong\u003e – Analog output (on applicable variants)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow It Works\u003c\/h3\u003e\u003cp\u003eThe sensor detects each passing magnet (Hall Effect) or slotted disc segment (IR optocoupler) and generates a digital LOW pulse. By counting pulses over a fixed time interval using Arduino's \u003ccode\u003eattachInterrupt()\u003c\/code\u003e, RPM is calculated as:\u003c\/p\u003e\u003cp\u003e\u003cem\u003eRPM = (pulse count \/ time in seconds) × 60\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eWorks with Arduino Uno, Nano, Mega, ESP32, ESP8266, STM32, and Raspberry Pi GPIO. No additional components required — plug in and start measuring.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":47132991455404,"sku":null,"price":110.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/0214\/4940\/files\/ArduinoRPMSensorRotationalSpeed.jpg?v=1788595239"},{"product_id":"arduino-uno-proto-shield-syb-170-mini-breadboard","title":"Arduino Uno Proto Shield with SYB-170 Mini Breadboard","description":"\u003ch2\u003eArduino Uno Proto Shield with SYB-170 Mini Breadboard\u003c\/h2\u003e\u003cp\u003eThis Arduino Uno Prototype Shield comes bundled with a SYB-170 mini breadboard, making it a perfect combo for rapid prototyping and circuit development. 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Do not confuse the two.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHID mode:\u003c\/strong\u003e When using Keyboard or Mouse libraries, the board may not appear as a serial port until code execution reaches \u003ccode\u003eSerial.begin()\u003c\/code\u003e. Use the reset button if the board becomes unresponsive.\u003c\/li\u003e\n\u003cli\u003eNot pin-for-pin compatible with Arduino Uno for shields using SPI or I2C — check shield compatibility before use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCompatible with the Arduino IDE. Select \u003cem\u003e\"Arduino Leonardo\"\u003c\/em\u003e as the board. 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No USB interface on-board — programming via an external FTDI 3.3V or CP2102 USB-to-Serial adapter.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMicrocontroller: ATmega328P (same core as Arduino Uno)\u003c\/li\u003e\n\u003cli\u003eOperating Voltage: \u003cstrong\u003e3.3V\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eClock Speed: \u003cstrong\u003e8MHz\u003c\/strong\u003e crystal oscillator\u003c\/li\u003e\n\u003cli\u003e14 digital I\/O pins (6 PWM outputs)\u003c\/li\u003e\n\u003cli\u003e8 analog input pins (10-bit ADC)\u003c\/li\u003e\n\u003cli\u003eFlash Memory: 32KB (2KB used by bootloader)\u003c\/li\u003e\n\u003cli\u003eSRAM: 2KB | EEPROM: 1KB\u003c\/li\u003e\n\u003cli\u003eOperating current: ~6mA typical (lower than 5V variant)\u003c\/li\u003e\n\u003cli\u003eInput voltage: 3.3V via VCC pin or 3.35V–9V via RAW pin (on-board regulator)\u003c\/li\u003e\n\u003cli\u003eUltra-compact: 33mm × 18mm PCB\u003c\/li\u003e\n\u003cli\u003eCastellated \/ through-hole edge pads for direct PCB integration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePin Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Pins:\u003c\/strong\u003e D0–D13 (D0\/D1 = UART TX\/RX)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Pins:\u003c\/strong\u003e A0–A7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePWM Pins:\u003c\/strong\u003e D3, D5, D6, D9, D10, D11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPI:\u003c\/strong\u003e D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI2C:\u003c\/strong\u003e A4 (SDA), A5 (SCL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming Header:\u003c\/strong\u003e DTR, RX, TX, VCC, GND, GND (FTDI 3.3V compatible)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBattery-powered sensor nodes and data loggers\u003c\/li\u003e\n\u003cli\u003e3.3V peripheral interfacing (GPS, GSM, NRF24L01, LoRa, SD card) without level shifting\u003c\/li\u003e\n\u003cli\u003eWearable electronics and ultra-compact embedded systems\u003c\/li\u003e\n\u003cli\u003eLow-power IoT edge nodes with sleep modes\u003c\/li\u003e\n\u003cli\u003eDirect PCB integration via castellated pads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e3.3V vs 5V Variant – Which to Choose?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse \u003cstrong\u003e3.3V \/ 8MHz\u003c\/strong\u003e when running on batteries, interfacing with 3.3V-only modules, or minimizing power consumption\u003c\/li\u003e\n\u003cli\u003eUse \u003cstrong\u003e5V \/ 16MHz\u003c\/strong\u003e when maximum processing speed is needed or working with 5V peripherals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProgramming\u003c\/h3\u003e\u003cp\u003eRequires a \u003cstrong\u003e3.3V FTDI or CP2102 USB-to-Serial adapter\u003c\/strong\u003e — do NOT use a 5V adapter as it will damage the board. 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