Water Flow Sensor (Sea) YFDN50 Flowmeter G2 10- 200L/min 5-24V

The HC-SR501 PIR Motion Detector Sensor Module is a pyroelectric device that detects motion by measuring changes in the infrared levels emitted by surrounding objects. This motion can be detected by checking for a high signal on a single I/O pin.

The module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens. It has a delay time adjustment Potentiometer and sensitivity adjustment Potentiometer.

It is used to sense the movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically-activated lighting systems. Compatible with ARDUINO, RASPBERRY PI, AVR, PIC, 8051, etc.

Features:

• Compact size
• Infrared sensor: dual-element, low noise, high sensitivity
• Blockade time: 2.5s (Default)
• Infrared Sensor with Control Circuit Board
• The Sensitivity and Holding Time Can be Adjusted
• Sensitive Setting: Turn to Right, Distance Increases (About 7M); Turn to Left, Distance Reduce (About 3M)
• Time Setting: Turn to Right, Time Increases (About 200S); Turn to Left, Time Reduce (About 5S).

HC-05 is a Bluetooth Transceiver Module and has TTL Output. HC-05 6 Pin Wireless Serial Bluetooth Module is a Bluetooth module for use with any microcontroller.  It uses the UART protocol to make it easy to send and receive data wirelessly. This Bluetooth module is a completely qualified Bluetooth V2+Enhanced Data Rate (EDR). It is 3Mbps Module with 2.4GHz radio transceiver and baseband. It has CSR Bluecore 04, an external single-chip Bluetooth system with CMOS technology and AFH, Adaptive Frequency Hopping, feature.

The HC-06 module is a slave only device.  This means that it can connect to most phones and computers with Bluetooth but it cannot connect to another slave-only device such as keyboards and other HC-06 modules.  To connect with other slave devices a master module would be necessary such as the HC-05 version which can do both master and slave.

Specification and Features:

• Voltage supply: 3.5v to 5v
• Working current: matching for 30 mA, matching the communication for 8 mA.
• Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps.
• With the integrated antenna and edge connector
• Sensitively: -80dBm
• RF Transmit Power: up to +4dBm
• Supported baud rate: 9600, 19200, 38400, 57600, 115200, 230400 and 460800
• Slave default baud rate: 9600
• Data bits: 8
• Stop bit: 1
• Parity: no parity
• A programmable input-output control
• Supported device: laptop, desktop, mobile, tablet
• Protocol: IEEE802.15.1
• Dormancy current: no dormancy.
• Bluetooth module HC-05 Master and slave Two in one module.
• Use the CSR mainstream Bluetooth chip, Bluetooth V2.0 protocol standards.
• Bluetooth protocol: Bluetooth Specification v2.0+EDR
• Security: Authentication and encryption.