Fibre glass reinforced, 1 1/4" cut off wheels/disc for dremel/rotary tools 10pcs for 250php

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MQ-2 MQ2 Smoke Gas LPG Butane Hydrogen Gas Sensor Detector Module

Module Applications:
Gas may be used in homes and factories leakage monitoring device suitable for the detection of gas, butane , propane , methane , smoke , etc. ;

Module Features :
1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions ;
2. The switching signal having a DO (TTL) output and analog output AO ;
3. TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
4. Analog output voltage with the higher concentration of higher voltage.
5. A gas, natural gas, city gas , smoke better sensitivity.
6. There are four screw holes for easy positioning ;
7. Product dimensions : 32 (L) * 20 (W) * 22 (H)
8. Has a long life and reliable stability
9. Rapid response and recovery characteristics

Electrical properties:
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .

Wiring:
1. VCC: positive power supply (5V)
2. GND: power supply is negative
3. DO: TTL switching signal output
4. AO: analog signal output

Datasheet:

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FT232RL FTDI Serial adapter Module USB to TTL 3.3V 5V Mini USB TTL

Description：
1. Original FT232RL chip;

Never blue screen , Never lost data, Support WIN8

2. Draw out all signal port of FT232RL chip;
3. RXD/TXD transceiver communication indicator;
4. USB power supply, can choose 5V or 3.3V ,set by jumper.

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SIM800L V2.0 5V Wireless GSM GPRS MODULE Quad-Band W/ Antenna Cable Cap

Sim800L is a GSM/GPRS module. You can send a message, make a call, transfer data though the GPRS or something else.


Overview
This SIM800l module has a set of TTL level serial interface, a set of power supply interface. Besides, there are a set of antenna interface on this module.
The chip of SIM800L basic features
SIM800H is a complete Quad-band GSM/GPRS solution in a LGA type which can be embedded in the customer
Applications:
SIM800H support Quad-band 850/900/1800/1900MHz, it can transmit Voice, SMS and data information with low power

Consumption:
With tiny size of 15.8*17.8*2.4 mm, it can fit into slim and compact demands of customer design. Featuring
Bluetooth, FM and Embedded AT, it allows total cost savings and fast time-to-market for customer applications.
General features
•Quad-band 850/900/1800/1900MHz
•GPRS multi-slot class 12/10
•GPRS mobile station class B
•Compliant to GSM phase 2/2+
– Class 4 (2 W @ 850/900MHz)
– Class 1 (1 W @ 1800/1900MHz)
•Bluetooth: Compliant with 3.0+EDR
•FM: 76~109MHz worldwide bands with 50 KHz tuning step
•Dimensions: 15.8*17.8*2.4mm
•Weight: 1.35g
•Control via AT commands (3GPP TS 27.007, 27.005 And SIMCOM enhanced AT Commands)
•Supply voltage range 3.4 ~ 4.4V
•Low power consumption
•Operation temperature:-40℃ ~85℃
Specifications for GPRS Data
•GPRS class 12: Max. 85.6 kbps (downlink/uplink)
•PBCCH support
•Coding schemes CS 1, 2, 3, 4
•PPP-stack
•CSD up to 14.4 kbps
•USSD
•Non transparent mode
Specifications for SMS via GSM/GPRS
•Point to point MO and MT
•SMS cell broadcast
•Text and PDU mode
Software features
•0710 MUX protocol
•Embedded TCP/UDP protocol
•FTP/HTTP
•MMS
•E-MAIL
•DTMF
•Jamming Detection
•Audio Record
•TTS
•Embedded AT (optional)
Specifications for voice
•Triode
– Half rate (HR)
– Full rate (FR)
– Enhanced Full rate (EFR)
•AMR
– Half rate (HR)
– Full rate (FR)
•Hands-free operation
（Echo suppression）
Interfaces
88 LGA pads including:
•Analog audio interface
•RTC backup
•Serial interface
•Interface to external SIM 3V/1.8V
•GSM Antenna pad
•FM Antenna pad
•Bluetooth Antenna pad
Compatibility
•AT cellular command interface Certifications (Plan):
•CE
•GCF
•FCC
•ROHS
•REACH
The module Basic features
 Arduino 51 STM32 AVR MCU compatible
 Prototype expand
 The frequency is 850/900/ 1800/1900 MHz
 Power supply range: voltage is 4.6-5.2v; current is 1A or more (the current is very important).
 Operating temperature range: -40 degrees C to +85 C
 Communication interface: The TTL level serial interface compatible 2.85/3.3/5v MCU
 LED: Two led, the Net led and the RING led.
 Size:27*39mm
 SIMCARD: micro SIMCARD holder


The description of pins:
The name of pins Description
5v Power interface Power the module
CONNECT TO DC5v
GND
VDD TTL UART interface The TTL UART serial interface, you can connect the MCU like 51MCU or ARM or MSP430 directly. The pin of VDD is used to match voltage of the TTL.
SIM_TXD
SIM_RXD
GND if this pin is unused, keep open
RST RST the module, if this pin is unused, keep open
The name of pins Description
5v Power interface Power the module
CONNECT TO DC5v
GND
VDD TTL UART interface The TTL UART serial interface, you can connect the MCU like 51MCU or ARM or MSP430 directly. The pin of VDD is used to match voltage of the TTL.
SIM_TXD
SIM_RXD
GND if this pin is unused, keep open
RST RST the module, if this pin is unused, keep open

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MQ-3 Alcohol Ethanol Sensor Breath Gas Detector Ethanol Detection

Module Applications:
Other places ethanol vapor detection of alcohol ( ethanol ) testing, field testing for motor vehicle drivers and other non- drinking and operating personnel

Module Features :
1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions ;
2. The switching signal having a DO (TTL) output and analog output AO ;
3. TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
4. Analog output voltage with the higher concentration of higher voltage.
5. A gas, natural gas, city gas , smoke better sensitivity.
6. There are four screw holes for easy positioning ;
7. Product dimensions : 32 (L) * 20 (W) * 22 (H)
8. Has a long life and reliable stability
9. Rapid response and recovery characteristics

Electrical properties:
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .

Wiring:
1. VCC: positive power supply (5V)
2. GND: power supply is negative
3. DO: TTL switching signal output
4. AO: analog signal output

Datasheet:
https://www.dropbox.com/s/dvz8qpoilg...sheet.pdf?dl=0

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PAM8610 2x15W Dual channel Stereo Class Digital Amplifier Board 12V

Features:
Working mode: Class D (PWM modulation type)
Chip type: PAM8610
Power Range: DC 6V-15V (self-protection)
Recommended voltage: DC 12V(2A)
Output Power: 10W x 2(8Ω) 15Wx2(4Ω)
Frequency Response: 20HZ-15KHZ
Static Current:20MA (DC12V)
SNR:90% Recommended
Speakers:10-100W
Input impedance: 15K
Output impedance: 4-8Ω
Harmonic distortion: <0.1%
Size:28x22x2.5mm

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EM4100 125K RFID Card Reader Module RDM6300 ID RF UART Output Arduino

Description:
Features:
Frequency: 125kHz
Baud rate:: 9600bps (TTL RS232 format)
Working voltage: DC 5V (±5%)
Relative humidity: 0-95%
Working temperature: -10℃ to +70℃
Storage temperature：-20℃ to +80℃
Wiring size:46mm x 32mm x 3mm
Module size:38.5mm x 19mm x 9mm
Supported card: EM/TK 4100, EM/TK4102, EM4200 or compatible
Receiving range：20-50mm (It depends on the antenna, card and the surroundings)

Sample Code:

String comdata = "";
Void setup ()
{
PinMode (2, the OUTPUT);
PinMode (3, the OUTPUT);
DigitalWrite (2, HIGH);
DigitalWrite (3, HIGH);
Serial. The begin (9600);
}

Void loop ()
{

DigitalWrite (2, HIGH);
DigitalWrite (3, HIGH);
While (Serial. The available () > 0)
{
Comdata + = char (Serial. The read ());
Delay (2);
}
If (comdata. Length () > 0 && comdata = = "0500 addf1443")
{
While (comdata. Length () > 0)
{
DigitalWrite (3, LOW);
Delay (100);
While (Serial. The available () > 0)
{
Comdata + = char (Serial. The read ());
Delay (2);
}
Comdata = "";
}
}
Else if (comdata length () > 0)
{
While (comdata. Length () > 0)
{
DigitalWrite (2, LOW);
Delay (100);
While (Serial. The available () > 0)
{
Comdata + = char (Serial. The read ());
Delay (2);
}

Comdata = "";
}
}
}

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ICL7107CPLZ ICL7107 Intersil DIP-40 3 1/2 Digit LCD/LED Display, A/D Converters

Description:
The Intersil ICL7106 and ICL7107 are high performance, low power, 3 1/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light emitting diode (LED) display.

Datasheet:
http://www.intersil.com/content/dam/...106-07-07s.pdf

Package Includes:
1 x ICL7107CPLZ

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MQ135 MQ-135 Air Quality Sensor Hazardous Gas Detection Module Arduino

Features
1. Size: 32mm X22mm X30mm length * width * height
2. The main chip: LM393, MQ135 gas sensing probe
3. Operating voltage: DC 5V

Features:
1. Signal output indicator instructions;
2. Dual signal output (analog output, and TTL level output);
3. TTL output valid signal is low; (output low signal light, which can be accessed microcontroller IO port)
4. Analog output with increasing concentration, the higher the concentration, the higher the voltage;
5. Sulfide, benzene Department of steam, smoke and other harmful gases with high sensitivity;
6. Has a long life and reliable stability;
7. Rapid response recovery characteristics;

Applications:
A hazardous gas detection apparatus for the family, the environment, suitable for ammonia, aromatic compounds, sulfur, benzene vapor, smoke and other gases harmful gas detection, gas-sensitive element test concentration range: 10 to 1000ppm

Datasheet:
http://www.china-total.com/Product/m...nsor/MQ135.pdf

Package Includes:
1 x MQ-135 module

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16CH Analog Digital MUX Breakout Board CD74HC4067 Precise module Arduino

Description:
This is a breakout board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067.
This chip is like a rotary switch - it internally routes the common pin
(COM in the schematic, SIG on the board)to one of 16 channel pins (CHANxx).
It works with both digital and analog signals (the voltage can’t be higher than VCC),
and the connections function in either direction.
To control it, connect 4 digital outputs to the chip’s address select pins (S0-S3),
and send it the binary address of the channel you want (see the datasheet for details).
This allows you to connect up to 16 sensors to your system using only 5 pins!

Since the mux/demux also works with digital signals,
you can use it to pipe TTL-level serial data to or from multiple devices.
For example, you could use it to connect the TX pins of 16 devices to one RX pin on your microcontroller.
You can then select any one of those 16 devices to listen to.
If you want two-way communications, you can add a second board to route
your microcontroller’s TX line to 16 device’s RX lines.
By using multiple boards, you can create similar arrangements for I2C, SPI, etc.
The internal switches are bidirectional, support voltages between ground and VCC,
have low “on” resistance and low “off” leakage, and to prevent crosstalk, perform “break-before-make” switching.
The board also breaks out the chip’s “enable” pin, which when driven high,
will completely disconnect the common pin (all switches “off”).

Features:
1.2V to 6V operation
2.“On” resistance: 70 Ohms @ 4.5V
3.6ns break-before-make @ 4.5V
4.Wide operating temperature range: -55C to 125C


Package Included:
1 x 16CH Analog Digital MUX Breakout Board CD74HC4067 Precise Compatible Arduino

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Four channel Relay Shield 5V 4 Channel Relay Shield Module for Arduino

Specification:
Relay Shield (ie 5V Quad Relay Module) is a small current signal control power equipment commonly used electronic module, enabling high-power single-chip control devices are widely used in SCM system to make smart home project; and can be directly plugged into the Arduino compatible the use of various types of motherboards, eliminating the patch cable troubles.

Module features are as follows:
1. Standard Arduino Shield interfaces and shape
2. Can continue to stack other Arduino expansion boards
3. 3 M3 screw positioning holes for easy installation
4. High Drive (5V or 3.3V) normally open contact closure
5. Onboard relay indicator (red)
Special Note: When using the Arduino UNO board connected to it, because UNO USB interface is extremely high, should avoid green terminals are shorted its shell.

Relay Shield Interface:
Relay: sky- 5V DC relay , model HJR-4102-L-5V, which Relay1 behalf of the 1st relay , the other and so on.
Power Interface : 5V DC power interface
Indicator: four lights are red when the relay is driven high , the corresponding indicator will light up .
Relay Terminals: Terminal high-power , high-current high voltage can be connected to the device . The 1st foot ( i.e. NOx) is a normally open pin , NCx pin is normally closed , COMx is common, i.e., when the relay is not driven , NOx and COMx open between two pins , NCx and COMx connection ; When the relay (x) control signal pin is high drive relays , NOx and COMx connection open between NCx and COMx.

Package Included:
1 x Four channel Relay Shield 5V 4 Channel Relay Shield Module for Arduino

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