{"title":"Distance \u0026 Presence","description":"","products":[{"product_id":"hc-sr04-ultrasonic-distance-sensor-non-contact-distance-measurement-module","title":"4 Pack HC‑SR04 Ultrasonic Distance Sensor – Non‑Contact Distance Measurement Module","description":"\u003ch1\u003e4 Pack HC‑SR04 Ultrasonic Distance Sensor – Non‑Contact Distance Measurement Module\u003c\/h1\u003e\n\u003ch2\u003eHC‑SR04 Ultrasonic Distance Sensor – Non‑Contact Distance Measurement Module\u003c\/h2\u003e\n\u003cp\u003eReliable HC‑SR04 ultrasonic distance sensor for non‑contact object detection and distance measurement, ideal for robotics, obstacle avoidance, smart parking, and Arduino\/ESP32 projects.\u003c\/p\u003e\n\u003ch2\u003eHC‑SR04 Ultrasonic Distance Sensor Compatibility \u003c\/h2\u003e\n\u003cp\u003eWorks with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and most microcontroller platforms using standard TRIG and ECHO digital pins. The module is typically powered at 5V, and ESP32\/3.3V systems may require Echo pin level shifting or protection depending on the setup.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features \u003c\/h2\u003e\n\u003cp\u003eNon‑contact ultrasonic distance measurement from approximately 2 cm to 400 cm, making it useful for obstacle sensing and range finding.\u003c\/p\u003e\n\u003cp\u003eGood measurement accuracy, commonly specified up to about 3 mm under suitable conditions.\u003c\/p\u003e\n\u003cp\u003eSimple 4‑pin interface with VCC, TRIG, ECHO, and GND for easy wiring into beginner and advanced projects.\u003c\/p\u003e\n\u003cp\u003eOperates by transmitting an ultrasonic burst at 40 kHz and measuring the echo return time to calculate distance.\u003c\/p\u003e\n\u003cp\u003eWidely used, affordable, and well supported by Arduino and ESP32 tutorials, libraries, and example code.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cp\u003eSensor type: HC‑SR04 ultrasonic ranging module.\u003c\/p\u003e\n\u003cp\u003eOperating voltage: typically 5V DC.\u003c\/p\u003e\n\u003cp\u003eOperating current: typically around 15 mA during measurement, with low standby current.\u003c\/p\u003e\n\u003cp\u003eMeasurement range: approximately 2 cm to 400 cm, with some guides noting best real‑world performance closer to 10 cm to 250 cm depending on surface and environment.\u003c\/p\u003e\n\u003cp\u003eUltrasonic frequency: 40 kHz.\u003c\/p\u003e\n\u003cp\u003eMeasuring angle: typically around 15°.\u003c\/p\u003e\n\u003cp\u003eTrigger input: 10 µs HIGH pulse to start a measurement cycle.\u003c\/p\u003e\n\u003cp\u003eOutput: ECHO pulse width proportional to distance; a common formula is time in microseconds divided by 58 for centimeters.\u003c\/p\u003e\n\u003ch2\u003eIdeal Uses\u003c\/h2\u003e\n\u003cp\u003eObstacle avoidance for robots, rovers, and autonomous vehicles.\u003c\/p\u003e\n\u003cp\u003eDistance measurement in parking, tank level, and object detection projects.\u003c\/p\u003e\n\u003cp\u003eEducational electronics projects for learning timing, sensors, and real‑world measurement with microcontrollers.\u003c\/p\u003e\n\u003cp\u003eInteractive installations and smart devices that need low‑cost proximity sensing.\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp\u003e1 × HC‑SR04 Ultrasonic Distance Sensor Module.\u003c\/p\u003e\n\u003ch2\u003eSafety Note\u003c\/h2\u003e\n\u003cp\u003eThis sensor performs best on solid, flat targets and can give weaker or less accurate readings on soft, angled, narrow, or sound‑absorbing surfaces. When using with 3.3V microcontrollers such as ESP32, protect the ECHO line appropriately if your board is not 5V tolerant.\u003c\/p\u003e","brand":"sugar","offers":[{"title":"Default Title","offer_id":44775946289287,"sku":null,"price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7763\/5719\/files\/HC_SR04UltrasonicDistanceSensor_d6719adf-a678-452a-af6a-3edf78de6b30.png?v=1780481905"},{"product_id":"ds3231-at24c32-high-precision-real-time-clock-module","title":"DS3231 AT24C32 High Precision Real-Time Clock Module","description":"\u003ch1\u003eDS3231 AT24C32 High Precision Real-Time Clock Module\u003c\/h1\u003e\n\u003ch2\u003eDS3231 AT24C32 High Precision Real-Time Clock\u003c\/h2\u003e\n\u003cp\u003eHigh‑precision I²C real‑time clock module based on the DS3231 with onboard AT24C32 EEPROM and battery backup, perfect for timekeeping in Arduino, ESP32, and Raspberry Pi projects.\u003c\/p\u003e\n\u003ch2\u003eLong‑Range IR Obstacle Avoidance Sensor Compatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with Arduino boards (Uno, Nano, Mega and similar) over the I²C bus using the SDA and SCL pins. Fully compatible with ESP32, ESP32‑S3, and ESP32‑C3 boards at 3.3 V I²C logic. Works with Raspberry Pi boards via the I²C interface when powered from 3.3 V.\u003cbr\u003eCan be used with most 3.3 V or 5 V microcontrollers that support I²C, including many STM32 and other MCU families.\u003c\/p\u003e\n\u003ch2\u003eKey Features \u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cp\u003eHigh‑precision DS3231 real‑time clock chip with integrated temperature compensation\u003c\/p\u003e\n\u003cp\u003eAT24C32 32‑Kbit EEPROM for additional non‑volatile storage on the same module\u003c\/p\u003e\n\u003cp\u003eI²C interface (SDA, SCL) compatible with 3.3 V and 5 V microcontrollers\u003c\/p\u003e\n\u003cp\u003eBattery‑backed RTC keeps time during power loss (coin cell holder on board)\u003c\/p\u003e\n\u003cp\u003eProvides seconds, minutes, hours, day, date, month, and year with leap‑year compensation\u003c\/p\u003e\n\u003cp\u003eOnboard pull‑up resistors and header pins for easy breadboard or jumper‑wire connections\u003c\/p\u003e\n\u003cp\u003eIdeal for data logging, clocks, scheduling, and automation projects\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cp\u003eRTC IC: DS3231 (temperature‑compensated RTC)\u003c\/p\u003e\n\u003cp\u003eEEPROM IC: AT24C32 (32‑Kbit I²C EEPROM)\u003c\/p\u003e\n\u003cp\u003eInterface: I²C (SDA, SCL)\u003c\/p\u003e\n\u003cp\u003eOperating Voltage: typically 3.3 V–5 V\u003c\/p\u003e\n\u003cp\u003eTime Format: 24‑hour or 12‑hour with AM\/PM\u003c\/p\u003e\n\u003cp\u003eCalendar: Full calendar with automatic leap‑year correction\u003c\/p\u003e\n\u003cp\u003eBackup Battery: Coin‑cell holder (battery policy can be specified in the listing)\u003c\/p\u003e\n\u003cp\u003eForm Factor: Small PCB with pin headers suitable for breadboards\u003c\/p\u003e\n\u003ch2\u003eIdeal Uses\u003c\/h2\u003e\n\u003cp\u003eData logging projects that need accurate timestamps even when the device is powered off.\u003c\/p\u003e\n\u003cp\u003eDIY clocks, alarms, and time‑based automation (lights, relays, scheduling systems).\u003c\/p\u003e\n\u003cp\u003eIoT devices that spend long periods offline and cannot rely on network time.\u003c\/p\u003e\n\u003cp\u003eEducational projects demonstrating I²C, timekeeping, and non‑volatile memory storage.\u003c\/p\u003e\n\u003cp\u003eAny microcontroller project that needs reliable timekeeping across resets and power cycles.\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:block [\u0026amp;_strong:has(+br)]:pb-2 [\u0026amp;_strong:has(+br)+br]:hidden\"\u003e1 × DS3231 AT24C32 High Precision Clock Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSafety Note\u003c\/h2\u003e\n\u003cp\u003eAlways double‑check your wiring before powering the module, especially when mixing 3.3 V and 5 V systems, to avoid damaging the RTC or your microcontroller.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIf you include a coin cell, do not short‑circuit or expose it to heat, and keep it out of reach of children and pets due to ingestion and burn hazards.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eAvoid connecting the module’s I²C pins directly to higher‑voltage logic than it is rated for; use level shifting or power it from a compatible voltage when in doubt.\u003c\/p\u003e","brand":"sugar","offers":[{"title":"Default Title","offer_id":44818146001031,"sku":null,"price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/7763\/5719\/files\/DS3231AT24C32HighPrecisionClockModuleTop.jpg?v=1780944709"}],"url":"https:\/\/sugarstore.dev\/collections\/sensors-copy.oembed","provider":"sugar","version":"1.0","type":"link"}