A device that detects a specified measured quantity and converts it into a usable output signal according to a certain rule.

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TTP224 Sensor
TTP224 Touch Sensor
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4-Channel TTP224 Touch Sensor Module Capacitive

$1.321pcs
4-key all-in-one design cuts wiring. 2.4-5.5V wide voltage supports mainstream MCUs. Independent sensitivity tuning fights interference, multi-mode switchable, on-board LEDs show real-time status !
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4-Pin Photoresistor 1
4-Pin Photoresistor 2
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4-Pin Photoresistor Sensor Module

$0.991pcs
The 4-pin photoresistor sensor module is widely used in light detection and automatic control systems.
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HY-SRF05 product
Bottom view of the module
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5 Pin HY-SRF05 Ultrasonic Module

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$2.621pcs
HY-SRF05 5-pin ultrasonic sensor, 5V-powered 2-450cm ranging with 3mm precision, anti-light/smoke interference, multi-trigger flexible control for robots/smart home/parking systems！
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ACS712 Current Sensor 20A

$2.001pcs
The ACS712 current sensor measures electrical current based on the Hall effect. A magnetic field generated by the flowing current is detected by an internal Hall element and converted into a corresponding analog voltage signal. This signal enables current calculation and is useful for monitoring system operating status.
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ACS712 Current Sensor 30A

$2.001pcs
Equipped with circuit-based detection and conversion, the ACS712 current sensor delivers accurate current readings and boasts an extended measuring range.
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ACS712 Current Sensor 5A

$2.001pcs
The ACS712 current sensor can measure and calculate the current value through the circuit, and it features a relatively wide measurement range.
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Active Buzzer Module -- High Level Trigger
Active Buzzer Module -- High Level Trigger 2
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Active Buzzer Module High Level Trigger

$0.991pcs
Buzzer sounds when MCU outputs HIGH. Simple logic, 3.3V-5V compatible. No complex coding needed, just set pin HIGH. Built-in oscillator for fixed tones. Easy install with mounting holes.
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Active Buzzer Module -- Low Level Trigger
Active Buzzer Module -- Low Level Trigger Size
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Active Buzzer Module Low Level Trigger

$0.991pcs
Buzzer activates on LOW signal. S8050-driven, 3.3V-5V ready. Fixed tones for alarms. No PWM needed, plug and play. Mounting holes for easy installation.
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AGS10 (1)
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AGS10 Air Quality Gas Detection Sensor Module

$5.001 pcs
High-precision real-time TVOC concentration detection, I2C interface for easy integration, compact surface-mount size, low power consumption, and high compatibility.
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AHT10 Temperature and Humidity Sensor Module
AHT10 Temperature Sensor
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AHT10 Temperature and Humidity Sensor Module

$2.461pcs
AHT10 compact yet powerful. Grab exact temp and humidity fast. Easy I2C, low drain, ideal for makers and smart tools. Bring live sense to your ideas.
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AHT20 Temperature and Humidity Sensor
AHT20 Module
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AHT20 Temperature and Humidity Sensor Module

$2.511pcs
AHT20 gives ultra precise, low power temperature and humidity sensing via I2C. Quick, steady results, simple linkup. Ideal for IoT, wearables, smart devices.
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AHT21B product cover
AHT21B product one
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AHT21B Digital Temperature and Humidity Sensor Module

$2.201pcs
AHT21B: I2C digital temperature/humidity sensor with high accuracy, fast response, and wide operating range for environmental monitoring.
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