USB to RS485 USB to 485 Max485 Converter

Characteristic: -Conductor: solid wire, tinned copper
-Insulation: PVC
-Low voltage electrical cables - Nominal voltage 300V / 80C -Standard: UL 1007
-Number of conductors: 22AWG, 1x0.35mm2
-Outer diameter: 1.6mm

- It has an Atmega328P chip running at 16Mhz with a factory loaded bootloader - The Uno R3 module has all the connectors than the Arduino Uno R3 and is compatible with all Arduino shields Arduino compatible UNO R3 board features:
- Includes USB Cable - ATmega328P 16MHz chip with external quartz crystal
- Microprocessor: ATmega328
- Operating voltage: 5V
- Input voltage (recommended): 7-12V
- Input voltage (limits): 6-20V
- Clock speed: 16 MHz
- Digital I / O Pins: 14
- Analog input pins: 6
- DC current per I / O Pin: 40 mA
- DC Current per Pin 3.3V: 50 mA
- Flash32 KB of which 0.5 KB are used by the bootloader - Atmega328
- SRAM 2 KB - Atmega328

High sensitivity to Ammonia (NH3), Nitrogen oxides (NOx), Alcohol, Sulphides, Benzene (C6H6), CO2, smoke and other harmful gases.  The MQ-135 sensor is to sensible for other gasses in the air so that is not possible to get good values for CO2 from it.
MQ-135 Air Quality Sensor features:
- Main chip: MQ-135 natural gas sensor and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Quick response features:
- Detection concentration:
   10ppm - 300ppm NH3
   10ppm - 1000ppm Benzene
   10ppm - 300ppm Alcohol
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

Ideal for projects with ARDUINO you can use it with PIC, AVR, STM32.
Provides seconds, minutes, time and date, calendar up to the year 2100.
DS1302 Real Time Clock RTC Module AVR ARM PIC features:
- Chip: DS1302
- Power supply: 2V-5V
- Operating current: <2mA
- Dimensions: 44 x23 x 8mm
- Battery not included in this sale
- Connect the RTC to your Arduino
VCC -> Arduino + 3.3V
GND -> Arduino Gnd
CLK -> (SCLK_PIN)
DAT -> (IO_PIN)
RST -> (CE_PIN)

Isopropyl alcohol is used for cleaning: - of electronic devices such as contact tips (such as those of ROM cartridges)
- tapes magnetic and disk heads (such as those for audio and video recorders and floppy drives)
- laser lenses on optical disc drives (eg CD, DVD) and removal of thermal paste of heat sinks and integrated circuit packages (for example: CPU)
-of the keyboard and LCD screen
-Usefully used to clean photographic lens lenses and contacts of electronic devices as it leaves no marks and is quick to evaporate.

The optical module sensor (reflective) with comparator LM393, which detects obstacles with high precision.
The ideal obstacle detection detector for the installation of smart robots.
TCRT5000 - reflective optical sensor that has a compact construction where the light emitter and receiver are placed in the same direction to detect the presence of a object using infrared reflection on the object.
The working wavelength is 950nm.
The transmitter is infrared LED and the phototransistor receiver.
By using LM393 comparator the module has a binary output (D0) that is at level 1 (object is detected).
The sensor allows the detection of an object at a distance of up to 12 mm.

Double Side Prototype PCB Board 5x7cm features:
-Thickness of PCB: 1.6mm
-Material: high quality FR-4 glass fiber PCB
-Presented and numbered on both sides
-Top and bottom are identical copper layers
-Pads grid (pitch) 2.54mm/0.1", hole diameter 0.9mm

The piezoelectric buzzer has a simple structure in which a ceramic piezoelectric disk is affixed to a vibrating plate. An alternative voltage applied to this element will cause a contraction or diametrical expansion of the element. This feature is used to fold a vibrating plate, which generates sounds. 2x Passive Buzzer 5V features:

- Input voltage: 3V to 12V
- Diameter: 12mm
- Height: 7.5mm
- Pin spacing: 6.5mm
- Impedance: 16 Ohm
- Working frequency: 2 to 5 KHz
- Quantity: 1 unit