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LM393 Sound Detection Sensor Module for controller detects whether the sound has exceeded a threshold value. The sound is detected via a microphone and fed into an LM393 op-amp. The sound level setpoint is set via an onboard potentiometer.
Can be used for Acoustic control light; give sound and light alarm working with Photosensitive sensor

Note: The Maximum induction distance is 0.5M

• Main Chip: LM393, Electret condenser microphone
• Working Voltage: DC 4-6V
• Signal output indication
• Single channel signal output
• The output effective signal is low level
• When there is sound,output low level and the signal lights

• Direct Replacement for the Raspberry Pi Camera Board Cable
• 300mm Overall Length
• 1mm Pitch
• 15 Way Flat Cable
• Conductor: Tin plated copper
• Insulation: White PVC
• Supporting tape: Blue polyester
• UL rating: UL2896
• Temperature rating: 80°C
• Voltage: 30V
• Flame test: VW-1, FT1, FT2
• CSA Standard: CAN/CSA-22.2 No.210.2

What's in the box?

1 x Camera Board Replacement Cable

• Integrated circuit
• Voltage regulator
• 5V
• Non insulated

• DC Voltage 50V
• Value 1uF
• Size 11mm x 5mm
• Pitch 2mm
• pack of 10

• Microcontroller: ATmega2560
  
• Operating voltage: 5V
  
• Input voltage (recommended): 7-12V
  
• Digital I/O pins: 54 (of which 14 provide PWM output)
  
• Analog input pins: 16
  
• DC current per I/O pin: 40 mA
  
• DC current for 3.3V Pin: 50 mA
  
• Flash Memory: 256 KB of which 4 KB is used by the bootloader
  
• SRAM: 8 KB
  
• EEPROM: 4 KB
  
• Clock Speed: 16MHz

It has four digits and a decimal point on each digit, designed for numeric output, so you can use it to add a clock, timer or counter into your next project.

These displays are multiplexed, common-cathode. What that means it that you can use a 74HC595 or just 8 microcontroller pins if you can spare them to control the 8 anodes (7-seg decimal) at about ~15mA each, and then connect NPN transistors or a TPIC6B595 to the cathodes to sink the 8*20mA = ~120mA maximum per digit.

This is an ultra bright RED colour.

Specifications

• 100mcd
• 14.2mm (0.56") digit height
• Color: red (630nm)
• Common cathode display
• Maximum power dissipation per segment: 66mW
• Maximum pulse peak forward current per segment (1/10th duty cycle, 0.1ms pulse width): 100mA
• Maximum forward current per segment: 20mA
• Maximum reverse voltage: 5V
• Maximum reverse current: 20µA
• Typical forward voltage: 2.1V at 20mA
• Maximum forward voltage: 2.5V at 20mA
• Operating temperature range: -30°C - 70°C
• Typical luminous intensity: 20mcd

• https://circuitdigest.com/microcontroller-projects/raspberry-pi-7-segment-display-tutorial
• https://raspi.tv/2015/how-to-drive-a-7-segment-display-directly-on-raspberry-pi-in-python

• This product is mainly used for water metering
  
• High amplitude ≥ 4.6V
  
• Low amplitude ≤ 0.5V
  
• Electric strength 1250V/min
  
• Insulation resistance ≥ 100MΩ
  
• Hydrostatic pressure testing ≤ 2.0Mpa
  
  

• The lowest rated working voltage: DC4.5 5V-24V
  
• Maximum operating current: 15 mA (DC 5V)
  
• Working voltage range: DC 5~18 v
  
• Load capacity: ≤ 10 mA (DC 5V)
  
• Use temperature: ≤ 80°C
  
• Operating humidity range: 35%~90%RH (no frost)
  
• Allowing pressure: pressure 2.0Mpa
  
• Temperature: -25~ 80 °C
  
• External threads: 1/2"
  
• Outer diameter: 20mm
  
• Intake diameter: 9mm
  
• Outlet diameter: 12mm
  
  

• Maximum Load: 50 W
• Max Switching Voltage: 100V DC
• Minimum Voltage: 250V DC
• Maximum Switching Current: 0.5 A
• Max Load Current: 1.0 A
• Max Contact Resistance: 0.4 Ω
• Temp Rating: -20~ 80℃
• Net Weight: 12g
• Material: PP

RC522 chip

MF RC522 is applied to the highly integrated read and write 13.56MHz contactless communication card chip, NXP launched by the company for the "table" application of a low-voltage, low-cost, small size of the non-contact card chip to read and write, smart meters and portable handheld devices developed better choice. The MF RC522 use of advanced modulation and demodulation concept completely integrated in all types of 13.56MHz passive contactless communication methods and protocols. 14443A compatible transponder signals. The digital part of to handle the ISO14443A frames and error detection. In addition, support rapid CRYPTO1 encryption algorithm, terminology validation MIFARE products. MFRC522 support MIFARE series of high-speed non-contact communication, two-way data transmission rate up to 424kbit/s. As new members of the 13.56MHz reader card series of highly integrated chip family, MF RC522 MF RC500 MF RC530 There are a lot of similarities, but also have many of the characteristics and differences. Communication between it and the host SPI mode helps to reduce the connection narrow PCB board volume, reduce costs.

RFID module

The MF522-AN module uses the the original Philips MFRC522 chip design circuit card reader, easy to use, low cost, and applies to the user equipment development, the reader and the development of advanced applications, the need for the user RF card terminal design/production. This module can be directly loaded into the various reader molds. Utilizes a voltage of 3.3V, through the SPI interface simple few lines directly with any user CPU motherboard connected communication can ensure that the module is stable and reliable work, distance card reader

Specifications

Electrical parameters

• Operating current :13-26mA/DC 3.3V
• Idle current :10-13mA/DC 3.3V
• Sleep current: <80uA
• Peak current: <30mA
• Operating Frequency: 13.56MHz
• Supported card types: mifare1 S50, mifare1 S70 MIFARE Ultralight, mifare
• Pro, MIFARE DESFire
• Product physical characteristics: size: 40mm×60mm
• Environmental Operating temperature: -20 to 80°C
• Environmental Storage Temperature: -40 to 85°C
• Relative humidity: relative humidity 5%-95%

Module interfaces SPI Parameter:

Data transfer rate: maximum 10Mbit/s

What's in the box?

1 x RFID-RC522 module
1 x Standard S50 blank card (Non-contact IC card)
1 x S50 special-shaped card (key ring shape)
1 x Straight and 1 x angled male to male header(Soldering required)

Resources

Setup guide

• Model Number: blank card
• Material: PV
• Colour: blank white
• Size: 85.6mm X 54mm
• Thickness: 0.8mm
• Printing: offset printing
• Chip: 1k S50
• Certification: CE,FCC
• Frequency: 13.56MHz
• Protocol standard: 14443a
• Memory: 8kbits

• Small and durable
• Waterproof, shockproof, anti-corrosive.
• Keyring for easy carrying.
• Not re-programmable

• Main Chip : Fudan F08 compatible S50
• Colour : Blue,Yellow, Black, Green, Red
• Size : Approx. 40.5×32×4.2mm
• Operating Frequency : 13.56 MHz
• Communication speed : 106K Boud
• Read distance : 2.5 ~ 10cm
• Read time : 1 ~ 2ms
• Operating Temperature : -20 ℃ ~ 85 ℃
• Endurance :> 100,000 times
• Storage capacity : 8Kbit, 16 partitions, each partition with 2 group passwords

• Joystick Size: Approx. 95x60x100mm
• Encoder Board Size: Approx. 85x35mm
• USB Cable Length: Approx. 1.8m
• Colour: Red

Please note: Pic is for illustration purposes only
 
The 1N400x (or 1N4001 or 1N4000) series is a family of popular one-ampere general-purpose silicon rectifier diodes commonly used in AC adapters for common household appliances. Its blocking voltage varies from 50 volts (1N4001) to 1000 volts (1N4007). 

Specifications

• Average forward current is 1A.
• Non-repetitive peak current is 30A.
• Reverse current is 5uA.
• RMS reverse voltage is 35V.
• Peak repetitive Reverse voltage is 50V.
• DO-41 Package.

What's in the box?

10 x diodes

Resources

Intoduction
Basics, Types, Characteristics, Applications & Packages

• Grid : 0.1" (2.54mm)
• Thickness : 1.6mm(5pcs)
• Hole diameter : about 1mm
• Material : FR-4 (glass fiber)
• All holes are plated through
• Both sides are identical

2 pin through hole rectifier diodes used for electronic projects, hobbies and repairs. Used in radios, power supplies and other devices.

This handy Ethernet extension cable will make it easy for you to enclose a device that has an Ethernet port. It's extra short (15cm), so perfect for mounting your Raspberry Pi, Beagle Bone, Arduino etc. into a box!

The jack half has two mounting 'ears' with M3 screws installed, 8mm apart. The ears are flexible so the holes don't have to be drilled very precisely.

Features

• Length between connectors: 15cm
• Colour: Black
• RJ45 Male to Panel Mount RJ45 Female
• Patch Cable
• M3 Mounting Ears (Two M3 x 6mm Screws Included)

What's in the box?

1 x panel mount ethernet adapter