sensors – Hamtech Electronics Technologies

5V Buzzer

admin — Thu, 20 Nov 2025 19:52:15 +0000

The 5V Buzzer is a compact, low-power sound-emitting device designed for use with microcontrollers, Arduino, ESP32, Raspberry Pi, and other circuits. It can operate on a 5V DC supply and generates a clear, audible beep when voltage is applied. It is ideal for alarms, timers, indicators, and DIY electronics projects requiring audio feedback.

Key Features

Operates on 5V DC
Compact and lightweight design
Produces a loud, clear tone
Easy to connect with Arduino, ESP32, Raspberry Pi, and other circuits
Low current consumption

Variants

Active 5V Buzzer (built-in oscillator, beep on applying voltage)
Passive 5V Buzzer (requires external PWM signal for tone generation)

Specifications

Feature	Details
Operating Voltage	5V DC
Sound Type	Active / Passive
Current Consumption	20–30 mA (typical)
Sound Level	85–95 dB (at 10 cm)
Dimensions	~12mm × 9mm × 5mm
Mount Type	Through-hole / PCB mount

Applications

Alarms and alert systems
Timers and notifications
Arduino and ESP32 projects
Robotics and embedded electronics
Doorbell or sensor feedback

Compatible Boards / Circuits

Arduino Uno, Mega, Nano
ESP32 / ESP8266
Raspberry Pi GPIO pins
Microcontroller circuits requiring audio feedback

MCP3008 ADC

admin — Thu, 20 Nov 2025 19:52:04 +0000

The MCP3008 is a versatile 8-channel 10-bit ADC that communicates via SPI protocol. It enables microcontrollers with limited analog inputs to read multiple analog sensors such as temperature sensors, potentiometers, light sensors, and more. This module is widely used in IoT, robotics, and embedded electronics projects requiring analog data acquisition.

Key Features

8 analog input channels (CH0–CH7)
10-bit resolution (0–1023)
SPI communication interface for easy integration
Operates at 2.7V–5.5V
Low power consumption, suitable for battery-powered projects
Compatible with Arduino, ESP32, ESP8266, Raspberry Pi

Variants

MCP3008 Standard SPI ADC Module
MCP3008 with breadboard-friendly pins

Specifications

Feature	Details
ADC Channels	8
Resolution	10-bit
Interface	SPI (MISO, MOSI, SCK, CS)
Operating Voltage	2.7V – 5.5V
Sample Rate	Up to 200 ksps
Package	DIP-16 (for module)

Applications

Reading multiple analog sensors
IoT sensor data acquisition
Robotics and automation systems
Microcontroller-based measurement systems
Educational and DIY electronics projects

Compatible Boards / Circuits

Arduino Uno, Mega, Nano
ESP32 / ESP8266
Raspberry Pi (via SPI)
Any SPI-compatible microcontroller

YF-S401 Flow Sensor

admin — Thu, 20 Nov 2025 19:51:46 +0000

The YF-S401 Flow Sensor uses a Hall-effect sensor to detect the rotation of a turbine inside the module. Each rotation generates a pulse, which can be counted by a microcontroller to measure water flow rate in liters per minute. It is widely used in IoT water monitoring, water dispensers, irrigation systems, and DIY smart home projects. The sensor operates at low voltages, is easy to interface, and provides real-time flow measurements.

Key Features

Hall-effect sensor-based flow detection
Measures water flow in liters per minute
Pulse output for microcontroller interfacing
Operating voltage: 5–18V DC
Flow range: 1–30 L/min
Compact and lightweight for easy integration
Compatible with Arduino, ESP32, and Raspberry Pi

Variants

YF-S401 Standard Flow Sensor
YF-S401 with 1/2″ or 3/4″ G1/2 threaded connectors

Specifications

Feature	Details
Sensor Type	Hall-effect
Operating Voltage	5–18V DC
Flow Range	1–30 L/min
Output Type	Pulse
Max Pressure	1.75 MPa
Operating Temperature	0–80°C
Thread Size	G1/2 (standard)
Dimensions	72 × 35 × 27 mm

Applications

Water flow monitoring and measurement
Smart water meters and IoT projects
Irrigation and water distribution systems
Water dispensers and filtration systems
DIY liquid flow experiments with microcontrollers

Compatible Boards / Circuits

Arduino Uno, Mega, Nano
ESP32 / ESP8266
Raspberry Pi (via GPIO)
Any microcontroller capable of counting pulses

KY-032 4pin IR Infrared Sensor

admin — Thu, 20 Nov 2025 19:51:43 +0000

The KY-032 Infrared Obstacle Avoidance Sensor Module uses an infrared transmitter and receiver to detect objects in its path. When an obstacle is detected, the module outputs a digital HIGH/LOW signal, which can be read by microcontrollers such as Arduino, ESP32, or STM32. The onboard potentiometer allows adjustment of sensitivity and detection range. The module is widely used in line-following robots, obstacle-avoiding robots, and other automation systems requiring proximity sensing.

Key Features

4-pin module: VCC, GND, DO (Digital Output), AO (Analog Output)
Detection distance: adjustable via onboard potentiometer (~2–30 cm)
Compact, breadboard-friendly design
Digital and analog outputs for flexibility
Low power consumption, easy microcontroller interface

Specifications

Feature	Details
Operating Voltage	3.3–5V
Output	Digital (DO), Analog (AO)
Detection Distance	2–30 cm (adjustable)
Current Consumption	≤20 mA
Dimensions	32 × 20 × 15 mm

Applications

Obstacle-avoiding robots and smart cars
Line-following robotic projects
DIY automation and smart devices
Proximity detection in sensors and alarms

Compatible Boards / Circuits

Arduino (Uno, Mega, Nano)
ESP32 / ESP8266
STM32 / Raspberry Pi
Can interface with LEDs, buzzers, relays, and other output modules

BME280 Sensor

admin — Thu, 20 Nov 2025 19:51:40 +0000

The BME280 Sensor is a compact and highly accurate module capable of measuring temperature, humidity, and atmospheric pressure. It communicates via I²C or SPI interfaces, making it easy to integrate with microcontrollers like Arduino, ESP32, and Raspberry Pi. With high precision and low power consumption, it is perfect for IoT weather stations, smart home systems, altitude measurement, and environmental monitoring applications. Its small footprint allows for easy placement in embedded projects.

Key Features

Measures temperature, humidity, and barometric pressure
High precision and low drift
Supports I²C and SPI communication
Low power consumption, suitable for battery-powered applications
Compact and breadboard-friendly design

Specifications

Feature	Details
Operating Voltage	1.8–3.6V DC
Pressure Range	300–1100 hPa
Temperature Range	-40°C to 85°C
Humidity Range	0–100% RH
Accuracy	±1 hPa (pressure), ±1°C (temperature), ±3% RH (humidity)
Interface	I²C, SPI
Current Consumption	≤0.1 mA (typical)
Dimensions	16 × 12 × 1 mm

Applications

Weather stations and environmental monitoring
Smart home and HVAC systems
Altitude measurement for drones and RC aircraft
IoT environmental sensing projects
Educational and DIY electronics projects

Compatible Boards / Circuits

Arduino (Uno, Nano, Mega)
ESP32 / ESP8266
Raspberry Pi (via I²C/SPI)
Can interface with displays, data loggers, and IoT platforms

ZMPT101B AC Voltage Sensor

admin — Mon, 17 Nov 2025 16:38:41 +0000

The ZMPT101B AC Voltage Sensor Module is a compact, high-accuracy voltage measurement board designed for single-phase AC voltage sensing up to 250V. It features the ZMPT101B precision voltage transformer and a high-accuracy operational amplifier circuit, enabling clean and stable signal sampling for microcontrollers.

This module outputs a sine-wave signal centered around a DC bias, making it easy to interface with analog-to-digital converters (ADC). The onboard potentiometer allows you to adjust the output amplitude without affecting the signal’s center value, giving flexible calibration for your application.

It is widely used in energy meters, power monitoring, smart home systems, voltage protection circuits, IoT data logging, and custom AC measurement projects.

Key Features:

Voltage Measurement Range: AC 0–250V
Voltage Transformer: Precision ZMPT101B
Output Signal: Sine wave (biased around mid-point DC level)
Sampling Circuit: High-precision op-amp with compensation
Supply Voltage: 5V–30V
Adjustable Sensitivity: Onboard multiturn potentiometer
Output waveform amplitude adjustable without shifting center value
Filtering Option: Add a capacitor (~105pF) at OUT to remove DC bias
PCB Dimensions: 49.5 × 19.4 mm

Applications:

AC mains voltage monitoring
Smart energy meters
IoT home automation systems
Over/under-voltage protection circuits
Real-time energy monitoring
Power quality analysis
Industrial automation

HC-SR04 Ultrasonic Distance Sensor

admin — Mon, 17 Nov 2025 04:07:14 +0000

The HC-SR04 Ultrasonic Sensor is one of the most widely used distance measurement modules in robotics and embedded systems. It uses ultrasonic waves to detect objects and returns precise distance readings with a typical accuracy of ±3mm.

The module operates using a simple Trigger and Echo interface, making it easy to integrate with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers. It’s commonly used in applications such as smart parking systems, obstacle avoidance robots, liquid level detection, and automated measurement tools.

The sensor transmits an ultrasonic burst at 40kHz, waits for the echo, and calculates the distance based on the time of flight. It is lightweight, stable, and designed for both beginners and advanced developers.

Key Features:

Operating Voltage: 5V DC
Operating Current: 15mA
Measurement Range: 2cm – 400cm
Accuracy: ±3mm
Frequency: 40kHz
Output: Digital pulse width (Echo)
Interface: 4-pin (VCC, Trig, Echo, GND)
Measuring Angle: 15°
PCB Size: 45mm × 20mm × 15mm

Applications:

Robotics and obstacle detection
Smart parking systems
Distance measurement tools
Water tank level monitoring
IoT automation and security systems
Autonomous vehicles and drones

DS18B20

admin — Mon, 17 Nov 2025 04:00:22 +0000

The DS18B20 is a reliable and easy-to-use digital temperature sensor with ±0.5°C accuracy over the -10°C to +85°C range. Using the 1-Wire protocol, multiple sensors can be connected to a single microcontroller pin, simplifying wiring and reducing hardware complexity.

This sensor is perfect for IoT devices, smart home monitoring, environmental sensing, aquariums, water tanks, and industrial temperature measurement. It comes in several variants: bare sensor (TO-92 package), with waterproof probe, and with protective stainless steel casing for harsh environments.

It supports both parasitic power mode and external power mode, giving flexibility for different applications.

Key Features:

Temperature Range: -55°C to +125°C (-67°F to +257°F)
Accuracy: ±0.5°C from -10°C to +85°C
Communication: 1-Wire interface
Multiple sensors can share a single microcontroller pin
Waterproof / Stainless steel probe options available
Power Supply: 3.0V – 5.5V DC
Operating Current: 750µA (active), 1µA (standby)
Packaging Options: TO-92 / Waterproof probe / Protective stainless steel case

HC-SR501 PIR Motion Sensor

admin — Mon, 03 Nov 2025 20:25:10 +0000

This PIR sensor detects human motion through infrared radiation. Commonly used in alarms, automatic lighting, intruder detection, and smart IoT systems. It features adjustable sensitivity and delay time, making it suitable for both indoor and outdoor applications.