MAX7219 led module 8 digit 7 segment display
- Power: 5V
- Colour: Red/Blue (This colour means the colour of the board, not the LED)
- Material: PCB + Electronic Components
- MAX7219 digital display control module
- This module is compatible with 5V and 3.3V microcontrollers.
- You can use it for Arduino
- Only three IO ports are used to drive the eight-digit display. MAX7219 supports flicker-free displays as well as cascading displays.
WeMos D1 Lithium Battery Charger Board with Mini USB
- Charging Voltage: max: 10V, recommend: 5V
- Charging Current: max: 1A
- Lithium Battery voltage: 3.3-4.2V
- Boost Power Supply: 5V(max: 1A)
- Can use  D1 mini without a USB cable, it's really wireless
- Can use D1 mini anywhere, using this battery shield and a lithium Battery.
- High reliability
- Charging, when the battery run out, you do not need to unplug the battery, just use the USB port to charge.
ISD1760 MODULE (75 sec)
- On-board ISD1760 chip
- Operating voltage: 5v
- 75 sec of audio playback
- Onboard microphone for direct recording
- Frequency: 6KHz or 8KHz
- Recording time: 6K/75 sec, 8K/60 sec
- Output all pin for chip control
- Easy interface with microcontrollers using 2.54mm spaced male pin headers
- High-quality natural voice reduction
- LED status indication
- Long recording time and multiple messages
- Simple operation and better voice quality
- Control not only by buttons but also by SPI from a microcontroller
- Recording, erase, play, FT, fast forward, reset volume buttons
- Dimension: 49*41.5mm
- Weight: 22gm
RELAY SHEILD
- Every channel maximum convert voltage: AC 125V / DC 24V
- Every channel maximum converts current: 3A
- Interface via digital I/O pins 4,5,6, and 7
- Relay screw terminals
- Standardized shield shape and design
- LED working status indicators for each relay
- High quality relays
- COM, NO (Normally Open), and NC (Normally Closed) relay pins for each relay
- Update pin SCL, SDA, IOREF, NC.
- Arduino,Crowduino,Seeeduino,Arduino Mega compatible
- Automatic control and manual control
- 4 mechanical relays with photo-coupled circuit
- 3-M3 screw hole easy to install
- Driven by 5V / 3.3V normally open contact close
SHARP Air detection sensor dust sensor GP2Y1010AU0F KG017
- Operating Voltage: 4.5V to 5.5V
- Low Current Consumption: 20mA max
- Sensitivity: 0.5V/(0.1mg/m3)
- Clean-air voltage: 0.9V typical
- Storage temperature:-20 ~80 degrees Celsius
- Minimum Detectable Dust Size: 0.5µm
- Smallest particles detected value: 0.8 micron
- Dust Density Sensing Range: Up to 580 µg/m3
- Sensing Time: Less than 1 Second
- Service life: 5 years
- The presence of dust can be detected by the photometry of only one pulse
- Enable to distinguish smoke from house dust
- Lead-free and RoHS directive compliant
- Operating temperature:-10 -65 degrees Celsius
- Dimensions: 46.0 x 30.0 x 17.6 mm
- Weight: 15gm
Screw Shield Expansion board for Arduino
- Arduino terminal to provide the IO, port connection.
- 81 posts quality, reliable, convenient, durable.
- Combined with the Proto Shield, the middle can be used as a prototype expansion board.
- Double-sided PCB Prototyping extended area vias connecting the front sides can be welded components.
- The middle section can be placed small bread plate, convenient test extend
SI4432 WIRELESS MODULE
- Power supply: 1.8-3.6 V
- Maximum output power: 20dBm
- Data transfer rate:0.123-256kbps
- Frequency range: 433.92MHz
- Sensitivity up to 20dBm
- FSK, GFSK, and OOK modulation
- Ultra-low-consumption shutdown mode
- Digital received signal strength indication (RSSI)
- Waketime
- Automatic matching and two-way antenna switch control
- Configurable packet structure
- Preamble detection
- 64-byte send and receive data register (FIFO)
- Low power detection
- 8-bit ADC and temperature sensor
- Integrated voltage regulator
- Frequency hopping
- Operating Temperature:-20 degree +60 degrees Celsius
- Transmission Distance (Maximum):1000 meters
- Power-on reset function
- Built-in lens adjustment
- Dimension :19*19*1 mm
- Weight :0.9 g
Force Sensor 5.08mm
- Two pins extend from the bottom of the sensor with 0.1″ pitch making it bread friendly.
- Device Rise Time: <3 microseconds
- Easily customizable to a wide range of sizes
- Actuation Force: 0.1 Newtons
- Cost-effective
- Ultra-thin; 0.45 mm
- Robust; up to 10 million actuation
- Force Sensitivity Range: 0.1 - 10.02 Newtons
- Simple and easy to Integrate.
- Non-Actuated Resistance: 10M W
- Temp Operating Range: 30 - +70 ºC
- 16MHz Clock Speed
- 32 KB Flash Memory
YF-S401 PVC Water Flow sensor
- Model: YF-S402
- Voltage Range: 5~12 V
- Operating Current: 15 mA (DC 5V)
- Insulation Resistance: >100 MΩ
- Inner Diameter: 4 mm
- Outside diameter: 7 mm
- Proof Water Pressure: <0.8 MPa
- Water Flow Range: 0.3-6 L/min
- Accuracy: ±5% (0.3-3L/min)
- Output Pulse High Level: >4.5 VDC (DC input voltage 5 V)
- Output Pulse Low Level: <0.5 VDC (DC input voltage 5 V)
- Output Pulse Duty Ratio: 50% ± 10%
- Water-flow Formula: 1L = 5880 square waves
- Working Humidity Range: 35% ~ 90% RH (no frost)
- 6 mm hose is recommended
- Avoid unit contact with corrosive chemicals
- The unit must be installed vertically, tilted no more than 5 degrees
- The liquid temperature should be less than 120 C to avoid damage to the unit
- With stainless steel axis in the wheel, abrasion-resistant
- Dimension: 58*35*26 mm
- Weight: 30g