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  • New SIM900A Kit Wireless Extension Module GSM GPRS Board Antenna ()
    Features: The onboard two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5--4.5V power supply, optional power on self starting (default) and control start. 
    The onboard SMA (default) and IPXmini antenna interface, SIM900A interface reserved reset. The size of the module is 49*50, all the new and original device. The computer can 
    give early computer debugging USB module power supply, a very large amount of data under the condition of the recommended current more than 1A. Standby dozens of MA data 
    can be set to provide dormancy, dormancy of 10MA low power.
     Support 2, mobile phone 3,4G card. The serial port circuit: support for 3.3V single chip microcomputer. TTL serial port support 3.3 and 5V single chip microcomputer. The SIM card circuit to increase the SMF05C ESD chip. Antenna circuit: guarantee short and straight, so as to ensure the signal strength. PCB display screen printing mark: each interface, convenient development two times, the SIM900/A hardware is completely follow the design when the design manual. Two power supply interface: VCC5, 5V DC above 1A. Computer 5V power supply can be early computer USB. DC long data circuit over larger recommended 5V1A. VCC4, 3.5--4.5V power supply, ibid., suitable for lithium battery. Control pin all leads. 
    A TTL level, compatible with 3.3V and 5V. The two antenna interface, the default SMA straight head, connector for IPXmini antenna. One way of speech interface, the way Mike interface. The control interface of each pin description: GND - GND SIMR SIM900A RXD, TTL level, can not be directly connected to the 232 level SIMT SIM900A TXD, TTL level, can not be directly connected to the 232 level RST - SIM900A reset, active low VCC_MCU when the SIM900A module and 5V TTL level communication, this pin is connected to DC 5V; when the level of communication of SIM900A and 3.3V TTL, this pin is connected to DC 3.3V. VCC5----DC 5V input. VCC4------DC3.5--4.5 input 
    Onboard Resources: 
    Serial port circuit(with protection) Antenna interface circuit(SMA bend female port) SIM card circuit(flip SIM slot) 
    4*3.5 fixture hole 4pcs SIM900A serial port output terminal 
    Specifications: Size:49mm x 47mm 
    Net Weight:28g 
    Weight: 38g Package
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  • DS18B20 Stainless steel package 1 meters waterproof DS18b20 temperature probe temperature sensor ()

      Length of Cable : 100CM

    Size of Stainless steel sheath:6*50mm

    Power supply range: 3.0V to 5.5V

    Operating temperature range:-55°C to +125°C (-67°F to +257°F)

    Storage temperature range:-55°C to +125°C (-67°F to +257°F)

    Accuracy over the range of -10°C to +85°C: ±0.5°C.

    Output leads: Yellow (VCC), Red (DATA), Black (GND)


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  • IRF520 MOS FET Driver Module ( Copy ) ()

    Description: RF520 Mosfet Driver Module


    Here is a simple breakout board for the IRF520 Mosfet. Easy hookup to your Arduino or other 3-5v micro controller. Pulse current through a PWM pin, and use this to control a pump, LED, or other DC device at up to 24v, and ~5A. You can check the specs here.

    Real simple to use: The simplest way of explaining how this little board works is this: You connect the power for the device you want to control to the Vin and GND. You connect your device to the V+ and V- screw terminals. When the SIG line is HIGH, a little LED lights up, and the GND is 'connected' to the V-. When the SIG line is LOW, the LED turns off, and the GND becomes 'disconnected' to the V-. The V+ and Vin are continuously connected.

    You can power this device from your Arduino, VCC goes to the 5V connection, and GND to the GND pin on your Arduino.


    • Voltage: 3.3V, 5V
    • Output load voltage :0-24V
    • Output load current: <5A (1A and above requires a heat sink)
    • Platform: Arduino, MCU, ARM, Raspberry PI.
    • Using original IRF520 Power MOS, you can adjust the output PWM.
    • Drive up to 24V allows the load, such as LED lights, DC motors, miniature pumps, solenoid valves.
    • PWM dimming LED can be used to achieve step less dimming, variable speed motor control.
    • Note: Above 1 A load, you need to install heat sink.
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  • SIM808 Module GSM GPRS GPS Development Board SMA With GPS Antenna For Arduino ()


    1.Three power input interface: DC044 interface and V_IN and a lithium battery interface.
    Note that: The range of DC044 and the V_IN pin voltage input is 5 - 26V, when use the 5V as the power, be sure that the power supply can provide 2A current. The range of voltage of Lithium battery input power is 3.5 - 4.2V.
    2. Switch: It is used to open / close the input power supply for the module. When in use, please confirm the toggle switched to the OPEN state (near the board inside).
    3. SMA antenna interface: there is a GSM antenna interface, a GPS antenna interface onboard and a BT antenna interface.
    4. Start button: When the board is power on, the LED (PWR) will light up. After a long press (about 2 second) on this button, the other three LEDs will be light. And one of them starts to flash; this suggests that SIM808 is beginning to work now. When the power supply, GSM and GPS antenna and SIM card are connected to the module correctly, the LED will be flash slowly (3Second de 1second light), that indicates that the module is registered to the network, and you can make a call or do something else.
    5. TTL serial interface: a TTL level interface. Notice that: The pin of VMCU is used to control the high level of TTL UART, so as to realize to match between 1.25V/3.3V /5V systems. For example, if you want to use the 51 MCU to control this board, the pin of VMCU should be connected the DC5V. And if use the STM32 MCU, the pin of VMCU should be connected the DC3.3V. The pins of RXD is the RXD of SIM808 and the pins of TXD is the TXD of SIM808. The pin of V_IN can connect the Power, the function of this pin has the same function of DC044.
    6. USB interface: This interface is just use to update the firmware of SIM808 module.
    Operation Description:
    1. Preparation:
    DC9V adapter
    USB-TTL module or other tools.
    PC software
    2. Hardware configurations
    2.1 Connect the USB-TTL to the UART interface
    USB-TTL SIM808
    2.2 Insert the valid SIM card to the SIMCARD holder.
    2.3 Connect the GPS antenna and GSM antenna to the board
    Connect the power adapter to the DC044 Interface
    2.4 Change the switch
    2.6 Press the POWKEY button for 2 second, the SIM808 module will work and the other 3 LEDs will light.
    Package Included:
    1 X SIM808 Moudle
    1 X GSM Antenna
    1 X GPS Antenna
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  • NodeMCU Motor Shield Board L293D for ESP-12E from ESP8266 esp 12E kit diy rc toy wifi rc smart car remote control Node MCU ()
    • ESP12 DEV KIT development board expansion module;
    • lead ESP12 DEV KIT All-function pins: SPI, UART, GPIO, AI and 3.3V power connector;
    • expand two-way motor-driven, two-way direct drive motor;
    • onboard power switch;
    • L293D
    • Motor power range: 4.5V ~ 36V;
    • Control power range: 4.5V ~ 9V;
    • Motor power, control power separation; In the experiment, by short-circuiting block the merger, the VIN and VM short, while power supply to the motor and the control board.
    • Motor Power (VM): 4.5V ~ 36V, can be a separate power supply;
    • Control power (VIN): 4.5V ~ 9V (10VMAX), can be powered separately;
    • Module provides short-circuit sub (short the VM and VIN), you can easily use one power (must 4.5V ~ 9V) simultaneously drive and control the motor;
    • Logic Operating current Iss: ≤60mA (Vi = L), ≤22mA (Vi = H);
    • Drive part of the work current Io: ≤1.2A;
    • Maximum power dissipation: 4W (T = 90 )
    • Control signal input level: High: 2.3V≤VIH≤VIN; Low: -0.3V≤VIL≤1.5V
    • Working temperature: -25 ~ + 125
    • Drive Type: Dual high-power H-bridge driver
    • ESP12E Dev Kit Control Port: D1, D3 (A motor); D2, D4 (B motor)
    • Module Weight: about 20g
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  • SIM900 GPRS/GSM Shield Development Board Quad-Band Module For Arduino Compatible High Quality ()

    The GPRS Shield is based on SIM900 module from SIMCOM and compatible with Arduino and its clones. The GPRS Shield provides you a way to communicate using the GSM cell phone network. The shield allows you to achieve SMS, MMS, GPRS and Audio via UART by sending AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands). The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module(They are all 2V8 logic) present onboard.


    Quad-Band 850 / 900/ 1800 / 1900 MHz - would work on GSM networks in all countries across the world. 
    GPRS multi-slot class 10/8
    GPRS mobile station class B
    Compliant to GSM phase 2/2+
    Class 4 (2 W @ 850 / 900 MHz)
    Class 1 (1 W @ 1800 / 1900MHz)
    Control via AT commands - Standard Commands: GSM 07.07 & 07.05 | Enhanced Commands: SIMCOM AT Commands.
    Short Message Service - so that you can send small amounts of data over the network (ASCII or raw hexadecimal).
    Embedded TCP/UDP stack - allows you to upload data to a web server.
    RTC supported.
    Selectable serial port.
    Speaker and Headphone jacks
    Low power consumption - 1.5mA(sleep mode)
    Industrial Temperature Range - -40°C to +85 °C 

    Package included:

    GPRS/GSM SIM900 Shield Development Board   x  1

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    • Ublox NEO6MV2 GPS Module Aircraft Flight Controller for Arduino
    • Power supply: 3-5V
    • Models: GY - GPS6MV2
    • The LED signal lights
    • The default baud rate: 9600
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  • HC-06 Bluetooth Wireless Module ()
    • HC-06 only supports Slave Mode
    • HC-06 Bluetooth wireless module allows your device to both send or receive the TTL data via Bluetooth technology without connecting a serial cable to your computer. Just Power, Ground, RX, TX and you can send data to/from Arduino.
    • Works with any USB Bluetooth Adapters
    • Default Baud Rate: 9600, 8, 1, n. Default Passcode: 1234
    • Built-in Antenna
    • Coverage up to 30ft
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  • 1/4W Metal Film Resistor ()

    Specifications as follows: 
    10 Ω, 22 Ω, 47 Ω, 100 Ω, 150 Ω, 200 Ω, 220 Ω, 270 Ω, 330 Ω,
    470 Ω, 510 Ω, 680 Ω, 1K Ω, 2K Ω, 2.2K Ω 3.3K Ω 4.7K Ω,,
    5.1K Ω, 6.8K Ω, 10K Ω, 20K Ω, 47K Ω, 51K Ω, 68K Ω 100K Ω,
    220K Ω, 330K Ω, 470K Ω, 680K Ω, 1MΩ 
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