Features :
Dual output mode, analog output more accurate
A fixed bolt hole for easy installation
With power indicator (red) and digital switching output indicator (green)
Having LM393 comparator chip, stable.
Specifications:
Working voltage: 5V
Working Current: <20ma
Interface: Analog
Depth of detection: 37mm
Working Temperature: 10℃~30℃
PCB Dimension : Approx.3cm x 1.5cm
Soil Probe Dimension : Approx. 6cm x 2cm
Arduino compatible interface
Low power consumption
High sensitivity
Output voltage signal: 0~4.2V

Features:
Practical power supply for your devices.

Constant and stable voltage output provides stable power to your devices.

Built-in over voltage, over current, and short circuit protection.

PWM design ensures the stability and high efficiency of power supply.

LED indicator light shows the charging status clearly.

Specifications:

Input voltage: AC100-240V || 50/60Hz

Output voltage: DC 12.6V

Output current: 2A

Plug: EU

Cable length: about 0.9 meters

DC plug: 5.5×2.5mm, compatible with 5.5×2.1mm

Polarity: positive inside and negative outside

When charging, the red light is on, the green light is on when fully charging, and the charging stops automatically.

Features:
Type: USB Cable, Metal Case USB cable, Elbow Data Cable
Use it to connect Arduino Uno, Arduino Mega 2560, Arduino 101, or any board with the USB female A port of your computer.
USB Data Sync Cable: for Arduino UNO / Arduino Mega 2560 Rev 3 R3
Length (Approx.): 30cm
Connector: USB 2.0 Connector, Nickel Plated
Type A male to B male plugs (connects device to computer)
Shielding: Braid

Features:
1. TDA2030A amplifier chip
2. 18-watt mono amplifier circuit design
3. Headphone wire blocks on the board
4. Adjustable resistance 10 K on board, you can adjust the amplification volume
5. A power indicator on the board
6. The chip is the main pin thread, you can directly enter the audio signal
7. Working voltage: 6 ~ 12 V
8. Output peak current 3A
Specification
Power: 6 V to 12 V
Power output: 18
Built-in potentiometer 10 kω
Dimensions: 32 x 24 x 23 mm
Weight: 11 g

Features:
Input voltage:3-40V
Output voltage:1.5-35V(Adjustable)
Output current: Rated current is 2A, maximum 3A(Additional heatsink is required)
Module Properties: non-isolated constant voltage module
Rectification: non-synchronous rectification
Short circuit protection: current limiting, since the recovery

Parameters:
Supply voltage: 3 V to 5.5 V
Average current consumption: 0.2 mA
It does not require additional external components
Temperature
Measuring range: 0 – 50 °C
Resolution: 8-bit (1 °C)
Accuracy: 1 °C
Response time: 6 – 15 seconds (usually 10 seconds)
Humidity:
Measuring range: 20 – 90% RH
Resolution: 8-bit (±1 % RH*)
Accuracy ±4 RH* (at 25 °C)
Measuring range: 6 – 30 sec
Dimensions: 32x15x10mm

Parameters:
Supply voltage: 3 V to 5.5 V
Average current consumption: 0.2 mA
It does not require additional external components
Temperature
Measuring range: 0 – 50 °C
Resolution: 8-bit (1 °C)
Accuracy: 1 °C
Response time: 6 – 15 seconds (usually 10 seconds)
Humidity:
Measuring range: 20 – 90% RH
Resolution: 8-bit (±1 % RH*)
Accuracy ±4 RH* (at 25 °C)
Measuring range: 6 – 30 sec
Dimensions: 32x15x10mm

Specifications:
Supply voltage: 5 V
Volume 85 dB
Current consumption: 30 mA max.
Frequency: 2.3 kHz ± 500 Hz
Diameter: 12 mm
Height: 9.5 mm
Case: THT

Specifications:
Alarm Diameter: 29mm
Alarm Height: 15mm
2 Mounting Holes Distance: 40mm
2 Wires length: 100mm
Diameter of mounting hole: 3.5 mm
Rated Voltage: 12V
Operating Voltage: 3-24V
Rated Current(MAX): 20mA
Min Sound Output at 10 cm: 95 DB
Resonant frequency: 3.3 kHz ± 0.5 kHz
Operating Temperature: -20～+80℃
Signal type: continuous sound

Module Features:
1. Working voltage: Wide voltage any voltage between 5-30V, Micro USB power connector and two solder terminals
2. Operating mode: feed the module power, output of the module state: normally open (NO) and the common terminal (COM) disconnected, normally closed (NC) and the common terminal (COM) is turned on.
Originating outside the contact (TRIG) to a low pulse signal, or touch trigger button and instantly, the relay and, working lights, this time, the status of the relay output: normally open (NO) and the common terminal (COM) is turned on, Normally Closed (NC) and the common terminal (COM) is disconnected after 0-24 seconds (this time can be adjusted according to your needs) relay opens after the bell, then relay back to the state before the trigger.
3. The time can be adjusted via a potentiometer, default 0-24 seconds. If you need more time, more replaceable capacitor (C2) or potentiometer. Delay time formula: T = 1.1RC. For example: 1M resistor capacitor 22uf then T = 1.1 * 0.000022 * 1000000 = 24.2 seconds.
4. With a relay indicator.
5. The module can be controlled: 10A 250VAC (AC), 10A 30VDC (direct current) following loads.
6. Has freewheeling protection relay.
7. signal terminal block is designed with a pull and a filter circuit, anti-jamming capability, suitable for industrial control. Many manufacturers have added optocoupler isolation, but with the trigger signal to the module and not isolation, would not achieve the interference effect. After the test was found to trigger or enhance the stability of end to interference, regardless of this module is the electromagnetic interference environment, or instantly through power module, the relay will not malfunction.
8. Size: 5.4 x 1.9 x 1.8cm (L x W x H)

Specification of the temperature sensor NTC-MF52
Supply voltage: 5 V
Type: analog/digital
Thermistor: NTC MF52 3950
Measurement range: from -55 °C to 125 °C
Accuracy: +/- 0.5 °C
PCB Dimensions: 35 x 15 mm

Technical Specifications
Microcontroller ATmega328P
Serial to USB Converter CH340
Operating Voltage 5V
Input Voltage 7-12V
Digital I/O Pins 14
PWM I/O Pins (Shared with Digital I/O) 6
Analog Input Pins 6
DC Current per I/O Pin 20mA
DC Current which can be drawn from 3.3V Pin 50mA
Flash Memory 32 KBytes
SRAM 2 KBytes
EEPROM 1 KBytes
Clock Speed 16MHz
Built-in LED Attached to digital I/O Pin 13
USB Connector Style B-Type Female
Board Dimensions (PCB) 68.8 x 53.4mm (2.7 x 2.1″)
Board Dimensions (with connector overhang) 77 x 53.4mm (3 x 2.1″)
Mfr China

Features
I2C Digital output of 6 or 9-axis MotionFusion data in rotation matrix, quaternion, Euler Angle, or raw data format
Input Voltage: 2.3 – 3.4V.
Tri-axis angular rate sensor (gyro) with a sensitivity of up to 131 LSBs/dps and a full-scale range of ±250, ±500, ±1000, and ±2000dps.
Tri-Axis accelerometer with a programmable full-scale range of ±2g, ±4g, ±8g and ±16g
Digital Motion Processing™ (DMP™) engine offloads complex MotionFusion, sensor timing synchronization, and gesture detection.
Digital-output temperature sensor.

Small Float Level Control Switch Plastic Float Switch