Elektronikus összetevők

16pcs/lot Raspberry Pi 3&Raspberry Pi 2 Model B the sensor module package 16 kinds of sensor Free shipping
 
 
 
 

 
 
 
 
 
Package include:
¥PIC minimum system board (including PIC16F877A microcontroller)
¥quality USB power supply line
¥PCB pillar 4
¥a data CD (includes software development, PDF format schematics, example programs, learning materials
 
 
 
 
 
 
 
 
 
 
 
 
 

 
Monster Moto Shield
 
 
Description: This is essentially a ramped up version of our Ardumoto motor driver shield. For this monster shield we\'ve replaced the L298 H-bridge with a pair of VNH2SP30 full-bridge motor drivers. We\'ve also beefed up the support circuitry so this board is capable of driving a pair of high-current motors! The VIN and motor out are pitched for our 5mm screw terminals (not included), making it easy to connect larger gauge wires.
 
Note: When using this board in extreme high-demand applications it may be necessary to improve thermal performance with a heat-sink or fan and to solder the wires directly to the board instead of using a screw terminal (in addition to the myriad other complications present in a high-current system) However, when using the board at currents up to 6A the chips will barely become noticeably warm.cjmcu
 
Features:
 
Voltage max: 16V
Maximum current rating: 30 A
Practical Continuous Current: 14 A
Current sensing available analog pin
MOSFET on-resistance: 19 mΩ (per leg)
Maximum PWM frequency: 20 kHz
Thermal Shutdown
Undervoltage and Overvoltage shutdown
 
 
 
 
 

Water flow sensor flowmeter Hall flow sensor Water control 1-30L/min 2.0MPa YF-S201

Water flow sensor flowmeter Hall flow sensor Water control 1-30L/min 2.0MPa YF-S201

Water flow sensor flowmeter Hall flow sensor Water control 1-30L/min 2.0MPa YF-S201

 
CJMCU-30 SGP30 Multi Pixel Gas Sensor Indoor Air Measurement TVOC/eCO2
 
 
 

This auction is forUSB3300 USB HS Board
USB high-speed PHY device for ULPI interface
 
Overview
TheUSB3300 USB HS Boardis an accessory board which acts as the USB high-speed external PHY device for ULPI interface, features the USB3300, MIC2075-1BM onboard.
Features
USB3300, MIC2075-1BM, ULPI interface
 
Package Contains
USB3300 USB HS Board × 1
 
 

Item specifics
Brand Name:
DC-DC 600W
Model Number:
Power Supply
Power Supply:
12-80V Boost Converter
Place of Origin:
China (Mainland)
Product Description
 
600W high-power booster module, wide voltage input: 12V to 60V, 12V to 80V adjustable the width voltage output;output current can be adjusted; ultra-low dropout voltage.
Detailed parameters:
Input voltage: 12V-60V
Input Current: Maximum input current 15A
Output voltage: 12V-80V continuously adjustable
Output Current: Maximum output current 10A
Output Power: P = effective power input voltage V * 10A
Note: this point to note, our nominal 600W maximum power of the module under certain conditions, in the case ofdifferent input voltage, maximum output power by the input maximum current limit decline. For instance, at
The input voltage is 12V: maximum output power P = 12V * 10A = 120W
The input voltage is 24V: maximum output power P = 24V * 10A = 240W
The input voltage to 60 V: maximum output power P = 60V * 10A = 600W
Conversion efficiency: Up to 95%  (input voltage, current; affect the output voltage, current conversion efficiency)
Short circuit protection: fuse
Installation size: 73 * 51mm
 
 
 
 
 
 
 
 
 
 
 

 
 
 

 
iBeacon  Module Bluetooth 4.0 BLE Support Near-field Positioning Sensor Wireless Acquisition
 
 Description:
Tested with iOS 7.0
Based on TI's CC2541. Range is 30M
Size: 24.8mm x 24.8mm,  thickness 7.5mm
 
You can customize your own iBeacon configuration including UUID etc
Support firmware upgrade 
Support

16pcs/lot Raspberry Pi 3&Raspberry Pi 2 Model B the sensor module package 16 kinds of sensor Free shipping
 
 
 

Using ADI's proprietary iCoupler® technology, the product is the industry's first single-encapsulated USB isolation solution. Compatible with USB 2.0, provide fully isolated 12 Mbps data rate, isolated 2500V voltage, no external power supply, no driver. USB signal timing, amplitude, direction, rate, protocol are extremely complex, so the implementation of USB signal magnetic isolation is also very complex technology, this section basically represents the highest level of isolation in the field.
Technical indicators:
S compatible with USB2.0
■ ADUM3160 isolation voltage: 2500V
■ Isolation voltage of power module: 1500V
■ Support USB full speed 12Mbps does not support pure high speed devices
■ Support USB control transmission, batch transmission, interrupt transmission, synchronous/isochronous transmission
■ Power supply: from the computer host USB port
■ Free drive, more convenient to use
■ Operating environment: -40℃ to 85℃
Why quarantine USB ports?
USB interface has been one of the most commonly used interfaces in the daily work and life of electronic engineers and practitioners. And as the computer industry became more and more competitive, and products became cheaper and cheaper,
Forcing most businesses to computer motherboard interface protection part can be simplified to simplify, can save the province. USB interface is not only often with the human body, external contact, and many times it is also
Power supplied by external equipment. All this has led to an early shutdown of the USB ports on many computers. Even the motherboard was damaged.
This product is suitable for the following users:
1. The working environment with strong electricity and strong interference
Part of the circuit contains strong current, strong interference (such as high voltage, frequency converter, motor drive, etc.) environment,
When it comes to the occasion of connecting with the computer, isolation must be carried out to ensure the computer and personal safety.
2. Noise sensitive area
As we all know, computers are a big source of noise. In the noise sensitive area, we can communicate and isolate the USB interface through this device. Such as high-precision USB data acquisition system, HIFI sound system.
3. USB debugging equipment
Such as a variety of USB interface JTAG/SWD emulator, ISP/ASP/IAP/ICP downloader. When you can not connect frequently in the debugging process, simulation exception, you can use the USB isolator to try to improve.
4. All kinds of industrial USB devices
In industrial environment, USB devices often crash, such as USB mouse, keyboard, USB to serial port and other communication devices. USB isolators can effectively reduce the chance of these devices crashing and damaging in industrial environments.
Sometimes it is necessary to extend the USB cable, and the USB isolator can act as an excellent USB repeater, as well as isolating the ground pressure difference between upstream and downstream devices.
5. Other common USB peripherals, such as mouse, keyboard,USB sound card,USB flash drive, printer, digital camera,USB HUB,USB camera.
Supported equipment after testing:
Full speed equipment:
USB drive, digital camera, card reader, mobile hard disk, U shield, USB hub, AVRJTAG, AVRISP, AVRISPMKII, S-Lab, JET51, J-Link, FET430UIF, Pickit2, XDS100, LPC-Link, ICD2, USB to serial port (F T232, CP2102, PL2303, CH341 chips).
After testing does not support the device USB wireless network card, part of the USB3.0 USB flash drive.
Note:
The on-board output power of this product is Jinshengyang B0505S with 1W power. When the working current of your USB device is >180mA, you can use the USB double-ended cable to supply power.
This product supports full speed devices, but not pure high speed devices (USB2.0). Most USB devices can be used with downward compatibility.

NRF51822 development board ble4.0 Bluetooth module development board 2.4G low power Kit

This is a kind of fine quality welding pen set, suitable for welding 18650/26650/32650 battery. The welding current approx. 90-130A, which is more than enough to welding common 0.1mm-0.12mm nickel plate. Upgraded to automatic triggered design, do not need to press button for long time anymore, completely frees your hands. You can have a try.
Features:
Lightweight and portable, stable and reliable, wear resistant and can provides long service time.
Through the MOS tube output, this energy will be concentrated at the end of the welding pen, and it will be heated by short circuit.
Fuse the nickel sheet firmly with the battery.
And it is precisely controlled by the single-chip microcomputer program without trigger switch.
Suitable for welding 18650/26650/32650 battery.
The welding current approx. 90-130A, which is more than enough to welding common 0.1mm-0.12mm nickel plate.
Upgraded to automatic triggered design, do not need to press button for long time anymore, completely frees your hands.
Battery recommended:
20-45ah leadacid battery with fine performance and small internal resistance.
3.5-5.5ah 3s 45C Li-polymer battery group.
30-35ah 18650 lithium battery group.
Specifications:
Name: Welding Tool Set
Material: metal
System voltage: 12-14.6V
Working current: 90-130A
Item size: 80 * 44 * 13mm / 3.15 * 3.15 * 0.51in
Item  weight: 147g / 5.19ounce
Package size: 154 * 102 * 42mm / 6.06 * 4.02 * 1.65in
Package weight: 185g / 6.53ounce
Packing List:
1 * Circuit Board
2 * 10AWG Input Cable
2 * Welding Pen
1 * Roll of Nickel Sheet
1 * Set of Screws

 
Module description:
The module uses HID technology,don\'t need any drivers, the download contain application program ,plug and play, support Windows 7 and XP 32 bit system(Note that : we have not tested 64 and other systems , so we don\'t know whether it\'s feasible) .We provide application development and C library code twice , no VB code, but are dll files .
 
Applications:
Switch control smart home , hotel intelligent switch , hotel intelligent electrical control , intelligent greenhouses,Shopping smart switch , the company plant intelligent switch , timer management cafes , karaoke OK timing control,Physical networking , industrial control equipment , testing equipment power control , street management, intelligent management, centralized power management.
 
Product parameters :
Input voltage : DC 12 V
Input Current : more than 300mA
Connection : NC / COM / NO
Relay parameters:
The maximum you can control AC 250V, 10A DC30V 10A AC load and maximum DC load
 
 
 
English software interface:
1.Green indicates the relay is closed , the red disconnect
2.After opening the device , the software automatically obtain the current working state relays
 
 
 
 
 
 
 
 
 
 

 
Enc28j60 Network Adapter Module for Raspberry Pi Zero
 
 
 
 
 
 
 

 
5A MPPT Solar Panel Controller DC-DC Step-down CC/CV Charging Module Display LED

Product Information: 
Product Name: Turbidity sensor module kit
 
Description:
Turbidity sensors is the use of optics , through the liquid solution and scattering rate of transmittance integrated to determine the turbidity case , since the amount of haze value is gradual , usually detected in a dynamic environment , the turbidity sensor acquisition value , the need for external control for AD conversion , the conversion to obtain the corresponding environment turbidity situation, so that the sensor can also need to produce a peripheral circuit detected in the system , with a waterproof probe , mainly used in washing machines, dishwashers and other equipment turbidity testing can also be used on electronic design, graduate design, electronic competition experiments and other applications.
Technical parameters:
1, Working voltage: DC5V
2 , Operating Current : 30mA (MAX)
3 , Response time : <500ms
4 , Insulation Resistance : 100M [Min];
5, the output way: Analog output 0-4.5V
6, the output way: high / low signal(  High : 5V    Low : 0V)
7 , operating temperature : -30 oC -80 oC;
8 , Storage temperature : -10-80 oC.
9, Weight : 55g
10 , Size : 30mm * 20mm * 12mm
 
Applications:
Washing machines, dishwashers , industrial control , environmental sewage collection and so on turbidity measurement and control needs of the occasion ;
Stay after purchase mailboxes sensor manual, as well as provide technical guidance services , does not provide product development and programming services .

SIM800A Kit Wireless Extension Module GSM GPRS STM32 Board Antenna Tested Worldwide Store more than 900A
 
 

 
Note:
1.Please allow 1-3mm errors due to manual measurement.
2.Due to the difference between different monitors,there are color differences,pls take the real product as the standard! 
 
Description:
High-Power Class D digital amplifier
1.It requires an 8-ohm speaker, input voltage 34V DC output power 80W 80W (dual-channel).
2.Operating voltage: 15 - 34VDC (generally using the recommended voltage 24V).
3.Efficiency: 90%
4.It requires a lot of power to use recommended power supply: 24V voltage output current over 5A (power shortage in power is a major dynamic phenomenon will appear when the staccato).
5.Recommended speaker impedance: 8 ohms Best (4 ohms or 6ohms in Europe also work).
 
Specification:
Color:As the picture shows
Size:Approx.90*64mm
Origina Box:No
 
Attention:
 
Size may be slight inaccuracy due to different batches of the products, or hand measurement;
Color may be little different due to monitors. Please take real product as standard, thanks for your understanding!
 
 

Su microcontrolador integrado de alta velocidad y baja potencia y chip de alto rendimiento SX1278 extendido LoRa espectro. Mediante la adopción de una eficiente codificación de detección de errores rectificadores mixtos, se mejoran enormemente la sensibilidad y la antiinterferencia. Potencia de transmisión de 100 mw, bajo consumo de energía, con funciones de sensei inalámbrico, espectro de extendido LoRa puede generar mayor distancia de comunicación. El módulo proporciona una opción de canal múltiple, puede modificar la tasa de baudios del puerto serial, enviar y recibir frecuencia en línea, potencia de transmisión, frecuencia de radio (rf) y otros parámetros.

Wholesale 1.54 inch 7PIN White OLED Screen Module SSD1309 Drive IC Compatible for SSD1306 IIC / SPI Interface 128*64
 
 

Charge mode IN
By setting the upper limit voltage UP and lower limit voltage DN; When the battery voltage is less than or equal to the lower limit voltage DN, the relay conducts and the charger starts to charge the battery. When the battery voltage is greater than or equal to the upper limit voltage UP, the relay is disconnected and an automatic charging is completed; The relay is on and IN blinks, indicating that it is charging.
 
Discharge mode OUT
By setting the upper limit voltage UP and lower limit voltage DN; When the battery voltage is greater than or equal to the upper limit voltage UP, the relay conducts and begins to discharge; When the battery voltage is less than or equal to the lower limit voltage DN, the relay is disconnected and an automatic discharge function is completed. If the relay is on and OUT blinks, it indicates that it is discharging.
 
Note: this product is a simple voltage controller, through the relay to open and shut off the output, only play the role of switching, not voltage change.
Function description:
1. Voltage percentage calculation: battery voltage/(upper voltage - lower voltage)
2. Key functions:
UP button: short press to switch display % and time, long press for 5 seconds to switch mode, charge mode: IN, discharge mode: OUT
SET key: Press to view the currently SET parameters. Hold down the SET button to enter the parameter setting interface. SET UP: upper voltage limit, DN: lower voltage limit, OP: on-time, dOP: delayed on-time (0-999 seconds), and FOP: strong guidance on-time (0-10 seconds) in discharge mode.
DOWN button: press the button to close/open the relay to enable (emergency stop function). After the relay is closed, the LCD displays OFF and the relay is disconnected
Long press DOWN button to set the state of LCD backlight L-P:OFF backlight is ON, ON: backlight will automatically go out after 5-10 minutes; After off any key to wake up.
3. Set parameters
A. Hold down SET to enter the parameter setting screen.
B. On the parameter setting screen, press SET to switch the SET parameters.
C. After parameters are selected, you can use the UP/DOWN key to set parameters. You can press and hold DOWN the key.
D. Repeat steps b) and c) to set other parameters.
E. After setting all parameters, hold down the SET key to exit and save the Settings.
 
3.1 Charge/discharge time control function
When the time parameter OP is set to non-zero, the charge/discharge time control is started. When the relay conducts to open a charge/discharge, start timing; When the timing is complete, the relay is automatically disconnected to complete a charge/discharge process; If the timing is complete, the detection voltage < the lower limit voltage DN in charging mode or the detection voltage > the upper limit voltage UP in discharge mode will automatically turn off the charge time control function, and the blinking display H:ER will remind the user that the time parameter is not set properly. Press any key to stop blinking;
In the case of no charge/discharge time control, the product will record a complete time, when entering the time display interface, flashing display charging time; Clear it when you exit the time display interface or the next charging start (relay conduction);
3.2 Automatic parameter detection:
When the parameters are set and exit, if the lower voltage dn is greater than or equal to the upper voltage UP, the system will blink "ERR" to remind.
3.3 Delay conduction function dOP(0~999 seconds):
The interval between completing a charge/discharge and opening again;
3.4 Forced start time of discharge conductance FOP(0~10S):
After the relay conduction condition is satisfied, the relay strong guidance pass (0~10S), and the battery voltage is tested again; This function is mainly for the discharge function. Some test loads will momentarily pull down to the lower limit voltage at the conduction moment, and the relay will be mistakenly triggered to disconnect and the normal discharge process cannot be carried out.
 
Common fault analysis
Q: What V level is suitable for use? What V voltage is suitable for this product?
Answer: this model is suitable for the use of the lowest 6V, the highest 60V voltage range, the maximum expenditure level 48V, because 48V battery is full of 60V, the higher it will burn, if your battery is higher than 48V, please choose other models.
Q: The relay snaps after power-on!
A: This is due to your charging current is too big or the battery capacity is too small to cause a immediately reaches the upper limit of voltage, electric relay disconnect, disconnect, voltage lower limit, voltage and quickly fell to start charging and cycle cycle, at this point you have to reduce the charging current and charging current is usually battery capacity of one over ten to 1.5, Such as 20AH battery charging current is generally about 2-3A! Note that high current charging will cause battery heating, accelerated aging, swelling and even explosion!
Q: What controls? Can automatic cycle charge? Can you charge it while using it? Can you limit the current?
Answer: This is voltage control. For example, set the lower voltage limit of 12.0V and the upper voltage limit of 14.5V. When the voltage reaches the value of 14.5V, the power will be off. Can be used while charging, voltage control mode only to turn off and open, can not limit the current, charging current completely depends on your charger!
Q: can I charge a 24V battery with 12V input, or can I charge a 12V battery with 48V input?
Answer: this is a simple voltage controller, only play a switch role, can not change the voltage to charge the battery, so you want to charge the battery to prepare what kind of charger! A must!

Warm prompt: Dear buyer, Our cheapest transportation services Economic category logistics (SunYou Economic Air Mail ,China Post Ordinary Small Packet Plus ) can be traced only befor it arrive your country,please choose Standard category logistics if you want a full tracking info.
MAG3110 3-Axis Digital Magnetometer I2C Interface Development Board TOP
 
 

Description:
Input voltage:6-24V and 5V
Switch electrical parameters: 10A
Static Current:20A
Size:61*66mm
Andoid app: https://www.adrive.com/public/ykRFCw/ZL-RC02D_en.apk
Apple app: please search TwoSwitchBle in app store
 
Document link: https://www.adrive.com/public/kbQRuH/2% 20Channel% 20Relay% 20Module% 20Bluetooth% 204.pdf
Note: For android phone, it must support bluetooth 4.0 LE, and the Android System must above 4.3 .
 
Package Included:
1 X 2 Channel Relay Module
 
 

Liquid Level Sensor Water level Switch sensor High Control Accuracy
 
Product description:
 
This is mainly level signal output, you need to set the alarm level first, the probe placed in the installation position, the liquid level to reach that location will have a signal output.
This can only be used as a level switch, and there is a signal when it touches the liquid.
Parameters:
working voltage: DC5V(special requirements can be modified by 12V/24V)
working current: <10MA
the output mode one : analog output 0-4.5V
the output mode two: high / low level signal output
the response time: <500ms
insulation resistance: 100M.
the working temperature: -30-80 centigrade
working humidity: 0-100% RH
waterproof properties: fully sealed waterproof design
installation: M15*12 round hole
lead length: 0.5 meters (default)
size: 30mm*20mm*11mm
weight:30g

Description:
 
Onboard EL817 optocouplers, optical isolation with strong anti-jamming capability
Onboard 5V, 10A/250VAC, 10A/30VDC relay, relay life long continuous pull 100,000 times
Modules can be directly and microcontroller I / O link, an output signal indicating
Freewheeling diode modules with protection, short response time
PCB Dimensions: 79.5 (mm) x71 (mm)
 
Package Included:
5 X relay modu
 
 
 
 
 
 
  

 
CJMCU-470 The new version is being built with a surface mount headphone jack. This page is for reference only.
 
This is an evaluation board for the Silicon Laboratories Si4703 FM tuner chip includes an amp and a headphone jack, and that's everything you need to get up and running! Beyond being a simple FM radio, the Si4703 is also capable of detecting and processing both Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. The Si4703 even does a very good job of filtering and carrier detection. It also enables data such as the station ID and song name to be displayed to the user.
 
Using this board we are able to pick up multiple stations just as well as with a standard FM radio. The board breaks out all major pins and makes it easy to incorporate this great chip into your next radio project. Also, by plugging headphones into the 3.5mm audio jack, you effectively use the cable in your headphones as an antenna! Therefore, this board does not require an external antenna if using headphones or a 3.5mm audio cable longer than 3 feet.
 

 
CJMCU-470 The new version is being built with a surface mount headphone jack. This page is for reference only.
 
This is an evaluation board for the Silicon Laboratories Si4703 FM tuner chip includes an amp and a headphone jack, and that's everything you need to get up and running! Beyond being a simple FM radio, the Si4703 is also capable of detecting and processing both Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. The Si4703 even does a very good job of filtering and carrier detection. It also enables data such as the station ID and song name to be displayed to the user.
 
Using this board we are able to pick up multiple stations just as well as with a standard FM radio. The board breaks out all major pins and makes it easy to incorporate this great chip into your next radio project. Also, by plugging headphones into the 3.5mm audio jack, you effectively use the cable in your headphones as an antenna! Therefore, this board does not require an external antenna if using headphones or a 3.5mm audio cable longer than 3 feet.
 

12V 16 Channel Relay Module Interface Board For PIC ARM DSP PLC With Optocoupler Protection LM2576 Power
Description:
Brand new and high quality.
· 12V 16-Channel Relay interface board, and each one needs 15-25mA Driver Current.
· Equiped with high-current relay, AC250V 10A;DC30V 10A.
· Standard interface that can be controlled directly by microcontroller (for , 8051, AVR, PIC, PLC,DSP, ARM, ARM, MSP430, TTL logic).
· Indication LED\\\\\\\'s for Relay output status.
· Size:18cm x 9cm x 1.8cm (5.47inch x 2.04inch x 0.67inch).
 
Package Included:
1 x 16 Channel 12V Relay Module
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Product Description
 
 
I. Overview 
The 5V ESP8266 four-way WIFI relay module uses the ESP-01 as a WIFI module, with a mature and stable 8-bit MCU chip. It can realize the wireless control of the 4-way relay using the mobile phone APP within the LAN in a simple configuration process. 
Second, functional characteristics 
1, Onboard high performance microprocessor and ESP-01 WIFI module; 
2, the module has 2 working modes: 
Mode 1: The mobile phone is directly mounted on the WIFI module; 
Mode 2: The mobile phone and WIFI module are loaded on the router at the same time; 
Additional features: It can also be used as a USB relay when the ESP-01 is unplugged.
 
3, transmission distance:
(1) In the open environment, the maximum stable transmission distance when the mobile phone is mounted on the WIFI module is 100m;
(2) When the WIFI module and the mobile phone are mounted on the router at the same time, the transmission distance is strong according to the signal of the router.
Weak and certain.
4. Use Smartconfig technology to complete the configuration of the ESP-01 WIFI module account and password on the mobile phone APP. The configured account and password have the power-off memory function.
5, On-board 12V, 10A/250V AC 10A/30V DC relay, can continuously suck 100,000 times, with diode escaping protection, short response time;
6, onboard mode selection and real-time working status indicator;
7, with 4 optocoupler isolation, strong anti-interference ability;
8, reserved UART debug interface and MCU program download interface.
Third, hardware introduction and explanation
Board size: 60*63mm
Board function description:
1, onboard resources:
IN , IN-: 12V power input;
5V, GND, TX, RX:UART serial port pin;
SWIM, PIN8, NRST: Reserved MCU program download port.
Button S1: Mode switch, default is mode 1
Press key S2: restore factory settings
LED D1/D2/D3/D4 (red light): Relay operation indicator lighted when turned on
LED D7 (red): Mode 1 indicator
LED D5 (blue light): Mode 2 indicator
LED D6 (green light): Operating status indicator, described as follows:
(1) When it goes out, it means that it is self-configuring or losing connection with the router;
(2) When 0.5S is flashing, it means waiting for the mobile phone APP to configure the WIFI account and password for the ESP-01 module;
(3) When the 2S flashes slowly, it means that the configuration is completed, waiting for a TCP connection with the handset;
(4) When it is always on, it means that it establishes a TCP connection with the handset.
Reserved 2 jumper caps: Please plug in the bottom end when using normally (ie RX connects RX1, TX connects TX1). If yo
 
 
 
 

 
 
 
 
 
 
Package Included:
1X HM-11 Bluetooth Module
 
 

 
 
 
Features:
-This product with wide frequency range, high gain, low noise figure
-This product can be applied to various rf receive front-end and increases communication distance
-Used for Short wave, FM radio, remote control receiver, such as cable TV signal amplifier need low noise rf signal amplification
 
Specification:
Size: 25 X 52mm
Diameter of end: 5mm 
Operating frequency: 0.1-2000MHz
 
Amplifier gain:
F=0.1MHz, gain=32dB
F=500Mhz, gain=31dB     
F=1000MHz, gain=29dB
F=1500Mhz, gain=25dB
F=2000MHz, gain=20dB
Maximum power output: 10dBm (10mW)
Power supply voltage: 6-12 VDC
System impedance: 50
 
Tips: 
1. When working frequency is less than 500 MHZ, it get well gain flatness, can make it less than 1dB after careful adjustment. The lower frequency the higher gain consistency.
2. Amplifier working frequency of the lower limit is subject to input and output capacitor, the default value is 0.1 uF, working to 0.1 MHz. Increase the input and output capacitance appropriately, can extend the cut-off frequency, such as 10uF capacitance can work to 5KHz.
3. When the power supply voltage changes in 5-8 v, it can be used as a variable gain amplifier, gain increases with the increase of the power supply voltage, which suitable for radio frequency receive front-end circuit, using DA control power supply voltage, to control the gain of the amplifier, automatic gain control
4. When the power supply voltage in the 8-10 v, the low frequency end gain up to 30 db, at this time the amplifier has a low noise coefficient and good stability.
5. When the voltage is 12 v, reach maximum gain, the low frequency end gain of 32.5 dB.
 
 
 
 

 
Product Introduction
Model:XY-160D
Double H bridge,which could drive two DC motors at the same time,single 7A current, high power;
Wide vlotage input:6.5V-27V
Signal optocoupler isolation input,With isolation and undervoltage protection and suit for EMC specifications for electromagnetic compatibility
It is electrostatic discharge circuit and stable and reliable, industrial grade.
 
Product Parameter
Dual motor interface, each rated output current 7A, peak current 50A, the motor interface must not short-circuit, the proposed series 10A fuse.
Power supply voltage 6.5V-27V, power supply must not be connected to or over 27V, otherwise it may burn out the module, it is recommended that the power input in series 15A fuse.
Working temperature -25 ° -80 °.
Enable signal terminal (ENA) input PWM adjustable speed, PWM frequency range 0-10KHZ, PWM minimum pulse width 10us.
Product size: 55 * 55 * 16mm (length and width).
Control signal voltage 3-6.5V, respectively, is the enable signal and the positive inversion control signal.
Installation hole diameter: 3mm, attention should be paid to prevent short circuit on the back of the circuit, you can add insulation pad or copper column to raise the circuit board.

Warm prompt: Dear buyer, Our cheapest transportation services Economic category logistics (SunYou Economic Air Mail ,China Post Ordinary Small Packet Plus ) can be traced only befor it arrive your country,please choose Standard category logistics if you want a full tracking info.
 
 
 
 
ATmega32U4 Board LilyPad
 
Description:The LilyPad Simple just got a whole lot... simpler. We\\\'ve updated the Simple board to create the LilyPad USB by replacing the classic ATMega328 with the new ATMega32U4. Not only does that mean that it\\\'s running a variation of the latest and greatest bootloader, but it also means no more FTDI Basic! The only extra piece of hardware you need to program the LilyPad USB is a micro-USB cable, since the new IC has built-in USB support. The LilyPad USB is also officially supported in the IDE as of version 1.0.2!
 
Just like the LilyPad Simple, this board features a JST socket so you can directly connect a Li-Po battery for power and an on-board power switch so you can turn it off when you\\\'re not feeling particularly blinky. These boards were designed to streamline your next sewable project by keeping things simple and giving you more room to work while eliminating the need to sew a power supply. The LiPo battery is even rechargeable through the board, no more special external LiPo chargers required!
 
LilyPad is a wearable e-textile technology developed by Leah Buechley and cooperatively designed by Leah and SparkFun. Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They\\\'re even washable!
 
 
 
Note:A portion of this sale is given back to Dr. Leah Buechley for continued development and education of e-textiles and also to LLC to help fund continued development of new tools and new IDE features.

This digital power amplifier board with high fidelity and two-channel stereo sound quality; input voltage is DC~24V, audio input supports Bluetooth, AUX, USB Input, can be directly connected to mobile phone, MP3, etc.
Product Name: Dual channel Bluetooth 5.0 power amplifier board
Input voltage: DC5-24V
Bluetooth Version: 5.0
Output impedance: 4~16ohm Speaker
For Speakers: 10W~200W
Output power: 50W*2
Audio input: Bluetooth, AUX, USB
Number of channels: two channels
Package:
1X power amplifier
\

 
CJMCU-470 The new version is being built with a surface mount headphone jack. This page is for reference only.
 
This is an evaluation board for the Silicon Laboratories Si4703 FM tuner chip includes an amp and a headphone jack, and that's everything you need to get up and running! Beyond being a simple FM radio, the Si4703 is also capable of detecting and processing both Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. The Si4703 even does a very good job of filtering and carrier detection. It also enables data such as the station ID and song name to be displayed to the user.
 
Using this board we are able to pick up multiple stations just as well as with a standard FM radio. The board breaks out all major pins and makes it easy to incorporate this great chip into your next radio project. Also, by plugging headphones into the 3.5mm audio jack, you effectively use the cable in your headphones as an antenna! Therefore, this board does not require an external antenna if using headphones or a 3.5mm audio cable longer than 3 feet.
 

Warm prompt: Dear buyer, Our cheapest transportation services Economic category logistics (SunYou Economic Air Mail ,China Post Ordinary Small Packet Plus ) can be traced only befor it arrive your country,please choose Standard category logistics if you want a full tracking info.

1. Industrial design, stable and reliable, with anti-static circuit, transient suppression protection, undervoltage protection, interface ESD and overvoltage protection;
2. Support a wide range of voltage 9-36V, maximum continuous load current 12A(without heat dissipation), 15A(simple heat dissipation), 20A(thick radiator);
3. Similar to L298 drive logic, can be three-wire (PWM,IN1, IN2) control speed, positive and negative rotation and braking;
4. Support full PWM, can directly use the key control forward and reverse, PWM effective range of 0.1% ~100.0% ;
5. Can provide 5V power supply for MCU and other controllers, and has 5V output overcurrent protection, and access signal overvoltage protection.
Control signal logic
Note: Where 0 is low level, 1 is high level, × is any level, and it is low level when hanging.
COM is the signal ground, 5VO is 5V output, can provide 5V power supply for MCU and other controllers; PWM pin can be connected with EXTERNAL PWM, if the use of key control mode, PWM pin should be connected with 5VO; IN1 and IN2 are two motor positive and negative rotation, braking (or brake) control signals.
IN1
IN2
PWM
OUT1 and OUT2 outputs
0 0 x The brake
1 1 x dangling
1 0 1 Forward at full speed
0 1 1 To reverse at full speed
1 0 PWM Forward speed
0 1 PWM Inversion of control
 Product parameters
1. The power supply voltage is 6V-36V (the voltage is too low and the load current is too high to damage the module, so the circuit board is marked 9-36V). The power supply must not be connected in reverse or over 37V; otherwise, the module may be burned out.
The rated current is 12 a. the rated current ranges from 12A to 15A for simple heat dissipation. The rated current ranges from 15A to 20A for thick heat dissipation. (Simple heat dissipation -- for example, put 1mm thermal conductive silica gel pad under the module and then use 5mm copper column to fix the module to the equipment wall)
3. The control signal interface (orange) can provide users with 5V. The SCM does not need additional power supply, and the maximum power supply current is 0.5A.
4. High level voltage of control signal: 2.0V ~ 5.5V, compatible with TTL level of 3.3V and 5V;
Low level voltage of control signal: 0V ~ 0.8V, 0V when suspended;
When the control signal voltage is 5V, the control signal current is 50uA.
5.PWM effective range: 0.1% ~ 100.0% ;
PWM signal frequency range: 0~100KHz (recommended 20KHz);
Minimum effective pulse width for PWM: 200ns
6. Operating temperature -25℃-80℃.
7. Product size: 55*55*25mm (length, width and height)
8. Mounting hole diameter: 3mm.
9. Weight: 38g

Still use Bluetooth 2.1?
IF you are in need of such a 4.0 BLE Bluetooth module, MCU can be set up,also can controlled by a remote Bluetooth device for setting,can transfer data, and can remotely control 10 PIO pins,so,the best choice is HM-10/11 bluetooth module.
HM-11 size is only have 2.4cm X 1.5cm .
HM-11 can work with IOS, PC, Android 4.3 now.
Product features:
Brand new and high quality.
Send and receive no bytes limit.
The power can be adjusted -23dbm, -6dbm, 0dbm, 6dbm, can modify through AT Command AT POWE.
Long range, Open space have 100 Meters with iphone4s.
Low Power: Only 0.5 mA for standby, Active 8.5 mA, support auto sleep.
Central & Peripheral in one.
UUID FFE0, FFE1.
Support serial port update firmware (add in V508).
 
 
Package Included:
1 x  HM-10 CC2541 CC2540 4.0 Bluetooth UART Transceiver Module Transparent Serial Port
 

Indoor Air SGP30 Measurement Gas Sensor Multi-pixel Gas Sensor TVOC/eCO2 Air Quality Formaldehyde Carbon Dioxide Detector Tester

Product name: 18650 lithium battery capacity tester
Product model: XH- M239
Display accuracy: 0.1
Measurement accuracy: 1mAH
Power supply voltage: DC5- 12V/18650 battery standby current: 5mA
Discharge current: about 500mA
Load power: 10W 8Q
Middle
Appearance size: 111*97*25mm
T104mm-60mm
Installation size: 3mm in the figure on the right
Product weight: 93g
Set the discharge stop voltage and press the display 888 to restore the factory setting at the same time.
Short press: start / pause switching
Short press: mAh/mWh toggles display\
Long press: data zero
* * automatic save without operation 5 seconds after the value setting is complete
 
The minimum discharge stop voltage of 18650 battery is 2.75V. In general, when the voltage is reduced to 0.875 times of the rated voltage (3.24V), it should be charged, and if it continues to be used, the voltage will drop rapidly, and it may be damaged by overdischarge, which will affect the life span. (recommended discharge termination voltage set to 3.5V)
The charging voltage is generally 4.20V-4.3V/4.35V.
Measurement time calculation
Assuming that the battery capacity is 2000mAH, the discharge current of this detector is about 500mAH. the measuring time is about 4 hours.

 
CJMCU-200 FT200XD USB to I2C module Full Speed USB to I2C Bridge
 
 
 
 

Description information (copy to browser) :
http://www.st.com/content/st_com/zh/products/development-tools/hardware-development-tools/development-tool-hardware-for- mcus/debug-hardware-for-mcus/debug-hardware-for-stm32-mcus/st-link-v2.html
 
 
Product introduction
St-link /V2 is an online simulation and download of STM8 and STM32 development tool!
 
Basic attributes
 
St-link /V2 is an online simulation and download development tool designed by ST Semiconductor for the evaluation and development of STM8 and STM32 series MCU.
STM8 series is connected with ST-link /V2 through SWIM interface;
The STM32 series is connected to ST-Link /V2 through the JTAG/SWD interface.
St-link /V2 connects to the PC through high-speed USB2.0.
 
 
Supported Software
 
Direct support for ST official IDE (integrated development environment software) ST Visual Develop (STVD) and burning software ST Visual Program (STVP).
15.0.7 Support for ATOLLIC, IAR and Keil, TASKING and other STM32 integrated development environments.
Supported devices
 
Support all STM8 series MCU with SWIM interface
Supports all STM32 microcontroller with JTAG/SWD interface
New devices are increasing in......
 
Microcontrollers supported by STVP release 3.2.5
 
 
 
 
 
Product lineMicrocontroller
 
STM32 STM32F100xx, STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx, STM32F107xx, STM32F2xxx, STM32F4xxx,
 
STM32L15xx6, STM32L15xx8,STM32L15xxB, STM32L151xC, STM32L151xD, STM32L152xC, STM32L152xD, STM32L162xD,
 
STM32TS60,
 
STM32W108C8, STM32W108xB, STM32W108xC, STM32W108xZ
STM8 STM8AF51x, STM8AF52x, STM8AF61x, STM8AF62x,STM8AH51x, STM8AH61x,
 
STM8S003K3, STM8S003F3, STM8S005C6, STM8S005K6, STM8S007C8, STM8S103xx, STM8S105xx, STM8S207xx, STM8S208xx, STM8S903F3,  STM8S903K3,
 
STM8L101xx, STM8L15x, STM8L16x,
 
STM8T141, STM8T142, STM8T143_Rev1,STM8T143_Rev2,STM8TL53x4
 
 
Function and performance
 
Programming function: can burn FLASH ROM, EEPROM, AFR and so on.
Simulation function: support full speed running, single step debugging, breakpoint debugging and other debugging methods, you can view THE IO state, variable data and so on.
Simulation performance: USB2.0 interface for simulation debugging, single step debugging, breakpoint debugging, fast response!
Programming performance: USB2.0 interface, SWIM/JTAG/SWD download, download fast!
Connection interface with target board
 
St-link /V2 provides SWIM and JTAG/SWD interfaces.
Firmware upgradeability
 
Firmware is updatable. More STM8 and STM32 models will be released, and new device models will be added to the device support list of STVD. When you need to use a new model in future development, upgrade STVD and upgrade firmware programs to support the new model.
The upgrade mode is automatic.
 
 
 
 
Packing list
 
St-link /V2 Host x one
USB data cable *1
20 cores ash row line *1 piece
SWIM connection line *2
 
 
 
 
 
 
 

 
Product Features
 
 
 
A long size : 28mm X 12mm X height 10mm width
Second, the main name : UV detection sensor
Three characteristics:
 
Operating voltage : DC 3-5V
Output voltage : DC 0-1V
Test accuracy : ± 1UV INDEX
Operating Current: 0.06mA max 0.1mA typ
Response Wavelength : 200nm-370nm
job stability : -20 ° -85 °
 
 
designed for applications requiring high reliability and precision measuring UV Index (UVI) designed for the occasion ;
suitable for measuring the amount of UV intensity of sunlight ;
control World Health Organization classification standard UV Index
UV detection wavelength :200-370nm;
fast response , full interchangeability ;
Using a patented solid polymer structure , waterproof and dustproof easy to clean ;
linear voltage signal output ;
small size , suitable for mobile phones and other portable products .
 
 
 
 

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 Included:
1 x SIM900A V4.0 kit
1x Power Cable
1x Antenna
Before you use the RS232 level interface,please connect the four pins as the shown below.
 
You can connect the sim900 moule with the PC using a USB—RS232moudule as shown below.
You can connect the sim900 module with the PC using a USB—TTL moudule as shown below.
Plese notice that the power supply voltage should be 3.7-4.2V and it can provide 2A or more