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Screen Size: 64x48 pixels (0.66” Across)
Operating Voltage: 3.3V
Driver IC: SSD1306
Interface: IIC(I2C)
IIC Address: 0x3C or 0x3D

35 w mono digital amplifier module
1. The Operating voltage: 10 to 30 VDC
2. It use 24 v 2 a power supply voltage output
3. It speaker impedance: 8 ohms Best (4 ohms 6 ohms also be 2)
Specification:
Color: As the picture shows
Size: Approx. 43 * 31 mm
The Original Box: No

multi-channel transceiver @ 868MHz 
support FSK, GFSK, ASK / OOK and MSK 
  configurable data rate: 1.2k to 500kps 
independent 64-byte RX and TX data FIFOs 
support radio wake 
supports automatic clear channel assessment
efficient SPI Interface
low power supply (1.8V-3.6 V)  

Products:
1, 5V solid state relays 240V 2A, output with resistive fuse 240V 2A.
2. Size: 55 * 33 * 25 (L * W * H) Weight: 21.5g
3, the input power supply: 5V DC (160MA)
4, the input control signal voltage:
 
          (0-2.5V low state relays ON)
(3.3-5V state high relay OFF)
 
5, blue KF301 terminals to the control line is more convenient.
Module Interface:
Input section:
DC : positive power supply (according to the relay voltage supply)
DC-: negative one
CH1: 1 relay module signal triggering end (low to trigger active)
CH2: 2 relay module signal triggering end (low to trigger active)
High and low meanings:
High trigger finger is a signal to the trigger terminal (IN) between the negative power supply and has a forward voltage, usually with a trigger and trigger the positive terminal connected to the power supply, when the trigger end has triggered positive voltage or reach When the voltage, the relay is energized.
Low voltage trigger refers to OV, or trigger voltage lower than the voltage supply terminal positive signal to trigger the end of the negative power between low enough to trigger the voltage, so that relay, usually the A negative trigger and the trigger end of the power connection, the relay is energized.
Electrical parameters:
Voltage version quiescent current working current trigger voltage trigger current
 1 channel 5V 0mA 12.5mA 0-2.5V 2mA
 2-way 5V 0mA 22.5mA 0-2.5V 2mA
Product description:
1. The module power supply: Power must be DC voltage to match the voltage relay

4S 30A 14.8V Li-ion Lithium 18650 Battery BMS Packs PCB Protection Board Balance Integrated Circuits 45x56mm Electronic Board
 
Name:Protection board
Specifications
Over charge detection voltage: 4.28 0.05 V
Over charging voltage: 4.095-4.195V
Over discharge voltage: 2.55±0.08
Over charge detection delay time 0.1s
Temperature range -30-80
Short circuit detection delay time: 100ms
Over current detection delay time: 500 ms
Balanced current: 60mA
Working current: 30A
Over current: 60A
Short circuit protection function: there is, disconnect the load can be self recovery.
Size:45x56mm
Main function:
Over charge protection, over discharge protection function, short circuit protection
function, over current protection function, balance.
Interface definition:
Charging port of the plate and the discharge port is the same, both positive and B- connecting
battery"-", P- charging port and port on the negative electrode;
B-, N-, P- pads are all over the hole, the hole diameter of the pad is 3.5mm;
The battery charging detection interface with DC output in the form of needle. Do the same mouth
when the N- is not wiring.

Warm prompt:
 
Dear buyer, Our cheapst transportation services Econmic 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.
 
For example:
like this

About V1.2.0
New PH2-2.0mm battery connector.
1A resettable fuse
Features
Charging Voltage: max: 10V, recommend: 5V
Charging Current: max: 1A
Lithium Battery voltage: 3.3-4.2V
Boost Power Supply: 5V(max: 1A)

Features:
100% brand new and high quality.
1. Battery type electricity quantity display.
2. Wide application fields: lithium battery.
3. Using Method: connect display board positive and negative port with tested battery positive and negative port, digital tube will display real-time battery electricity quantity.
4. Digital Color: outline red, display block blue (when battery electricity quantity is full, it will be all on).
 
Display Electricity Quantity Parameter: (note:N represents battery quantity) 
1.When battery voltage is over N*3.3V, it will illuminate 1 block electricity quantity. 
2.When battery voltage is over N*3.5V, it will illuminate 2 blocks electricity quantity.
3.When battery voltage is over N*3.7V, it will illuminate 3 blocks electricity quantity.
4.When battery voltage is over N*3.9V, it will illuminate 4 blocks electricity quantity.
5.When battery voltage is less than N*3.3V, 4 blocks display will be off; it represents battery is less than 3.3V, and you can charge the battery.
 
Specifications:
Material: Plastic and Metal
Shell Color: Black
Digital Color: outline Red, display block Blue
Type: 1#: Without case version;  2#: With case version (Optional)
     Without case version: 1S Single 3.7V Lithium Battery Capacity Indicator Module 4.2V Blue Display Electric Vehicle Battery Power Tester Li-po Li-ion
     With case version: 1S 3.7V Lithium Battery Capacity Indicator Module 4.2V Blue Display Electric Vehicle Battery Power Tester Li-ion With Shell
Size: 
     Without case version: 31×20mm/1.22×0.79in (Approx.)
     With case version: 48×29×21mm/1.89×1.14×0.83in (Approx.)
Quantity: 1 PC (other accessories demo in the picture is not included)
 
Note: 
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Features:
 
    100% Brand New.
    Size: 48mm x 29mm x 21mm.
    Display color: Red & Blue LED (dual display).
    Display: 0.28" LED digital.
    Operating voltage: DC 4.5 ~ 30V.
    Measure voltage: DC 0 ~ 100V.
    Minimum resolution (V): 0.1V.
    Refresh rate: ≥500ms / times.
    Measure accuracy: 1% (± 1 digit).
    Minimum resolution (A): 0.01A.
    Operating Current: <20mA.
    Measure current: 10A (direct measurement, built-in shunt).
    Operating temperature: -10 to 65°c.
    Operating Humidity: 10 to 80% (non-condensing).
    Mounting cutout: 45.5mm x 26.5mm.

Bt201 Dual Mode 5.0 Bluetooth Lossless Audio Power Amplifier Board Module Tf Card U Disk Ble Spp Serial Port Transparent Trans
Function introduction:
1. Support Bluetooth audio, BLE data transmission, U disk playback, TF card playback. Support MP3/WAV/FLAC/APE format decoding
2. Optional: Serial AT command control. Support to modify the baud rate. Modify Bluetooth name, specify device playback, and mobile data passthrough
3. Support BLE and SPP dual-mode data transparent transmission, colleagues can also broadcast Bluetooth audio, no conflict
4. Support Bluetooth call, multi-button control. The last song, the next song. play / Pause. Adjust the volume and other simple functions.
5. Support to get the full file name of the play. Serial port specified path to play, loop or single play
6. Support 128KBS recording function, TF card or U disk. Recording delete playback, etc.
7. Rich usage information, reference PCB, use video tutorial, mobile phone transparent video tutorial. Serial AT video tutorial
8. Easily dock existing apps, or develop WeChat applets to implement mobile phone control
Color: green

nput voltage range: 6V to 32V
Output voltage: The default is 5V. After the fast charge is triggered, it is automatically adjusted between 3 and 12V.
Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.)
Output voltage wired compensation
Conversion efficiency: 90% to 97%
Supports multiple fast charging protocols
Input overvoltage, undervoltage protection
Input over-current protection
Output overcurrent and short circuit protection
Over temperature protection
 
Support fast charging protocol
for BC1.2, iPhone, Samsung agreement
for Qualcomm QC2.O and QC3.O
MTKPEI.1/PE2.O
Fast Charge Protocol FCP
Star Fast Charge Protocol AFC
Spreadtrum Fast Charge Agreement SFCP
 
Applications
Solar panel to mobile phone charging
Car charging retrofit
Driving recorder power supply
Home power conversion
 
 
 

nput voltage range: 6V to 32V
Output voltage: The default is 5V. After the fast charge is triggered, it is automatically adjusted between 3 and 12V.
Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.)
Output voltage wired compensation
Conversion efficiency: 90% to 97%
Supports multiple fast charging protocols
Input overvoltage, undervoltage protection
Input over-current protection
Output overcurrent and short circuit protection
Over temperature protection
 
Support fast charging protocol
for BC1.2, iPhone, Samsung agreement
for Qualcomm QC2.O and QC3.O
MTKPEI.1/PE2.O
Fast Charge Protocol FCP
Star Fast Charge Protocol AFC
Spreadtrum Fast Charge Agreement SFCP
 
Applications
Solar panel to mobile phone charging
Car charging retrofit
Driving recorder power supply
Home power conversion
 
 
 

nput voltage range: 6V to 32V
Output voltage: The default is 5V. After the fast charge is triggered, it is automatically adjusted between 3 and 12V.
Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.)
Output voltage wired compensation
Conversion efficiency: 90% to 97%
Supports multiple fast charging protocols
Input overvoltage, undervoltage protection
Input over-current protection
Output overcurrent and short circuit protection
Over temperature protection
 
Support fast charging protocol
for BC1.2, iPhone, Samsung agreement
for Qualcomm QC2.O and QC3.O
MTKPEI.1/PE2.O
Fast Charge Protocol FCP
Star Fast Charge Protocol AFC
Spreadtrum Fast Charge Agreement SFCP
 
Applications
Solar panel to mobile phone charging
Car charging retrofit
Driving recorder power supply
Home power conversion
 
 
 

Model: GY - 511
Size: 14.5 mm * 20.5 mm
Name: LSM303DLHC module (three axial magnetic field triaxial acceleration)
Chip built-in 12 bit AD converter, a 16-bit data output
Using high quality heavy gold PCB, machine welding process to ensure quality

Performance:
 1.conventional constant voltage output topology BOOST fully integrated solutions, integrated MOSFET, fewer external components, lower system cost
 2,.wide voltage range input,the input voltage up to 35V
 3. output voltage is adjustable,supports up to 40V
 4.built-in over-temperature protection, overcurrent protection circuit full set of reliability, high reliability
 5.the system conversion efficiency of over 90% , to facilitate thermal design
 6.TO263-5L standard package,suitable for 30W boost applications within.
 
Instructions:
1. Power (3-35V), power indicator light, the module is working properly.
 2. Adjust the blue potentiometer knob (counter-clockwise general boost, buck clockwise rotation) and with a multimeter to monitor the output voltage reaches the required voltage.
 
Note:
Current work long hours is recommended for use in less than 2.5M, while adding bulk Heat sink (10W output above); because it is boosting module, in order to ensure stable output Set, please keep the minimum 1.5V differential.

Brand new
Size: approx.50*30*2mm
Lampshift maximum discharge current: 15A
Instantaneous discharge current: 25A
Charging voltage: 25.5V
Charging current: 15A (MAX)
Overcharge detection voltage: 4.28 ± 0.05V
Overcharge protection delay: 0.1S
Overcharge release voltage: 4.08 ± 0.05V
Over discharge detection voltage: 2.55 ± 0.08V
Overdischarge detection delay: 0.1S
The overdischarge release voltage: 2.9 ± 0.1V
Overcurrent detection voltage: 150mV
Overcurrent detection delay: 9MS
Overcurrent protection current: 30 ± 3A
Overcurrent protection release condition: Disconnect the load
Short circuit detection delay: 250uS
Short circuit protection Release condition: disconnect negative open
Main circuit conduction resistance: ≤20mΩ
Working current: ≤30uA
Sleep current (battery over discharge) ≤10uA
Temperature range: -30 / 80 °

 MEGA2560 WIFI

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.
 The module is a low-power consumption character LCD Module with a built-in controller. 
The module can be easily interfaced with a MCU. 
Description: 
This LCD display module can be widely used in various fields 
Working Voltage: 5V 
Blue backlight, black characters 
Display Format: 8 characters x 2 lines 
Module Size (L x W x H): Approx. 2.28 x 1.26 x 0.4 inch / 5.8 x 3.2 x 1.05 cm 
Viewing Area: Approx. 1.5 x 0.63 inch / 3.8 x 1.6 cm 
Character Size: 2.96 x 5.56mm
 
 

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.
 The module is a low-power consumption character LCD Module with a built-in controller. 
The module can be easily interfaced with a MCU. 
Description: 
This LCD display module can be widely used in various fields 
Working Voltage: 5V 
Blue backlight, black characters 
Display Format: 8 characters x 2 lines 
Module Size (L x W x H): Approx. 2.28 x 1.26 x 0.4 inch / 5.8 x 3.2 x 1.05 cm 
Viewing Area: Approx. 1.5 x 0.63 inch / 3.8 x 1.6 cm 
Character Size: 2.96 x 5.56mm
 
 

 

 
 
The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board.
The USB transceiver inside the 32U4 allows us to add
USB connectivity on-board and do away with bulky external USB interface.
 
This tiny little board does all work for Arduino tricks that you're familiar with:
4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as
hardware serial connections Rx and Tx. Running at 16MHz and 5V,
this board will remind you a lot of your other favorite for Arduino-compatible boards but this little guy can go just about anywhere.
There is a voltage regulator on board so it can accept voltage up to 6V(Blue board)/18V(Black board).
If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.
 
This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled.
We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
 
 
 
Features:
 
 
ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board MINI USB connector for programming
4 x 10-bit ADC pins
12 x Digital I/Os (5 are PWM capable)
Rx and Tx Hardware Serial Connections
Our Smallest for Arduino-Compatible Board Yet!
 
 
 
 
 
 
 

 
 
The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board.
The USB transceiver inside the 32U4 allows us to add
USB connectivity on-board and do away with bulky external USB interface.
 
This tiny little board does all work for Arduino tricks that you're familiar with:
4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as
hardware serial connections Rx and Tx. Running at 16MHz and 5V,
this board will remind you a lot of your other favorite for Arduino-compatible boards but this little guy can go just about anywhere.
There is a voltage regulator on board so it can accept voltage up to 6V(Blue board)/18V(Black board).
If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.
 
This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled.
We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
 
 
 
Features:
 
 
ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board MINI USB connector for programming
4 x 10-bit ADC pins
12 x Digital I/Os (5 are PWM capable)
Rx and Tx Hardware Serial Connections
Our Smallest for Arduino-Compatible Board Yet!
 
 
 
 
 
 
 

 
 
The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board.
The USB transceiver inside the 32U4 allows us to add
USB connectivity on-board and do away with bulky external USB interface.
 
This tiny little board does all work for Arduino tricks that you're familiar with:
4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as
hardware serial connections Rx and Tx. Running at 16MHz and 5V,
this board will remind you a lot of your other favorite for Arduino-compatible boards but this little guy can go just about anywhere.
There is a voltage regulator on board so it can accept voltage up to 6V(Blue board)/18V(Black board).
If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.
 
This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled.
We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
 
 
 
Features:
 
 
ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board MINI USB connector for programming
4 x 10-bit ADC pins
12 x Digital I/Os (5 are PWM capable)
Rx and Tx Hardware Serial Connections
Our Smallest for Arduino-Compatible Board Yet!
 
 
 
 
 
 
 

Features:
Tesla coil is a transformer (resonant transformer) that operates on the principle of resonance.
It can produce high-temperature and high-pressure plasma, and can ignite, wirelessly transmit electricity, illuminate fluorescent lamps. It has wonderful arcs and used for many fun and very interesting scientific experiments.
This product is newly developed. The primary coil is already in the PCB board. It does not need to be wound on the outside. It is convenient for fans to install, high efficiency and beautiful. It is a new design.
If you choose DIY Tesla Coil Kit parts, it needs to be soldered and assembled by yourself. Tools needed: soldering iron, glue gun, water pliers, etc.
Specification:
Type: 01#: Parts, 02#: Finished product
Input voltage: 9-12V, can be started with 9V battery, but if there is an arc, the working voltage needs 12V.
PCB board size: 3.1x4cm/1.22x1.57inch
Color: As shown
Quantity: 1 Set
 
Note:
1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package includes:
1 x PCB board
1 x Coil
2 x 3MM LED Blue
1 x DC005 seat
2 x 105 monolithic capacitor
1 x 8x8 self-locking switch
2 x 10K resistor
1 x 15x10x20 small heat sink
1 x 3x6 screw
1 x BD243
1 x Bubble
4 x M2x4 screw
4 x M2x7 double pass copper column

Features:
Tesla coil is a transformer (resonant transformer) that operates on the principle of resonance.
It can produce high-temperature and high-pressure plasma, and can ignite, wirelessly transmit electricity, illuminate fluorescent lamps. It has wonderful arcs and used for many fun and very interesting scientific experiments.
This product is newly developed. The primary coil is already in the PCB board. It does not need to be wound on the outside. It is convenient for fans to install, high efficiency and beautiful. It is a new design.
If you choose DIY Tesla Coil Kit parts, it needs to be soldered and assembled by yourself. Tools needed: soldering iron, glue gun, water pliers, etc.
Specification:
Type: 01#: Parts, 02#: Finished product
Input voltage: 9-12V, can be started with 9V battery, but if there is an arc, the working voltage needs 12V.
PCB board size: 3.1x4cm/1.22x1.57inch
Color: As shown
Quantity: 1 Set
 
Note:
1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package includes:
1 x PCB board
1 x Coil
2 x 3MM LED Blue
1 x DC005 seat
2 x 105 monolithic capacitor
1 x 8x8 self-locking switch
2 x 10K resistor
1 x 15x10x20 small heat sink
1 x 3x6 screw
1 x BD243
1 x Bubble
4 x M2x4 screw
4 x M2x7 double pass copper column

Description:
TP5100 is a double switch buck 8.4V, single cell 4. 2V lithium battery charge management chip. Its ultra-compact QFN16 package and simple external circuit, making TP5100 ideal for portable equipment so large current charging management applications.Meanwhile, TP5100 built-in input overcurrent, undervoltage protection, over temperature protection, short circuit protection, battery temperature monitoring, reverse battery protection. 
  
TP5100 have 5V-18V wide input voltage, dual battery trickle charge into pre-charge, constant current, constant voltage three phase, pre-charge current trickle charge current through an external resistor adjustment, the maximum charge current up to 2A. TP5100 with a frequency of 400kHz switching mode makes it possible to use a smaller outer Suo device and the large current charging still maintain a smaller amount of heat. 
  
TP51OO built-in power PMOSFET, anti-intrusion circuit, so no anti-intrusion protection and other external Schottky diode. 
 
  
Features: 
 
- Double 8.4v / 4.2v lithium rechargeable single 
- Programmable charge current. 0. 1A-2A 
- Programmable steady precharge current 10% -100% . 
- Wide operating voltage, maximum reach I8V 
- Red and green LED charge status indicator 
- Chip temperature protection, overcurrent protection, undervoltage protection 
- Battery temperature protection, reverse battery shutdown, short circuit protection 
- Switching frequency 400Khz, usable inductance 20uH and more 
- PWR_ON Power battery for switching control 
 
  
Maximum Ratings: 
 
- Static input supply voltage (VlN): 20V 
- BAI: -8.4V-20V 
- BAT Short-Circuit Duration: Continuous 
- Operating environment Temperature range: -40 ° -85 ° 
- Storage temperature range: -65 ° - 125 ° 
  
 
Application: 
 
- Portable equipment, various chargers 
- Smartphone, PDA, mobile cellular telephone 
- MP4, MP5 players, tablets 
- HM 
- Power Tools 
- Walkie-talkie 
  
Default shipping settings: 4.2V 2A. The board has with LED, and LED's external reserve position. 
  
Size: 25 * 17 * 5mm ultra-small size 
Input voltage: 5-18V DC power supply 
Charge status: full and unloaded blue lights, charging red.
 

Free Shipping CP2102 Serial Converter USB 2.0 To TTL UART 6PIN Module with Dupont line
 
1.PCB size: 26.5mm * 15.6mm
2.PCB Color: Red
3. Weight: 4g
4. Using the new chip CP2102
5. with resettable fuse. In the event of accidental short-circuit can effectively protect your device and computer USB port to download
6. With three LEDs: power indicator, the indicator data reception, data transmission indicator, work status at a glance
7. 3.3V and 5V with two power output
8. all the useful lead pins
9. with reset signal output can be directly Pro mini and other Arduino board to download!
10. Compatible Operating Systems:
-Windows 98 / Me / 2000 / XP / 7
-MAC OS-9
-MAC OS
-X-Windows CE
-Linux 2.40 or later

Product Description
Solderless breadboard 830
• Wire size: Suitable for 29-20 AWG wires
• Size: 16.5 x 5.5 x 0.85 cm
• Double sided tape on bottom. Can be fixed on a flat surface

About Drv8825
 
Introduction:
 
The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.
 
The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.
 
The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
 
Features:
 
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
 
 
Subdivision:
 About A4988
 
Introduction:
 
This product is a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product. This stepper motor driver lets you to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A.
 
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
 
 
Feature：
 
Simple step and direction control interface;
 
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step;
 
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated;    
 
Voltage to achieve higher step rates;
 
3.3 and 5 V compatible logic supply
 
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay);
 
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection;
 
Short-to-ground and shorted-load protection.
 
 
Subdivision:
 

About Drv8825
 
Introduction:
 
The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.
 
The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.
 
The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
 
Features:
 
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
 
 
Subdivision:
 About A4988
 
Introduction:
 
This product is a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product. This stepper motor driver lets you to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A.
 
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
 
 
Feature：
 
Simple step and direction control interface;
 
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step;
 
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated;    
 
Voltage to achieve higher step rates;
 
3.3 and 5 V compatible logic supply
 
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay);
 
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection;
 
Short-to-ground and shorted-load protection.
 
 
Subdivision:
 

About Drv8825
 
Introduction:
 
The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.
 
The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.
 
The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
 
Features:
 
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
 
 
Subdivision:
 About A4988
 
Introduction:
 
This product is a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product. This stepper motor driver lets you to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A.
 
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
 
 
Feature：
 
Simple step and direction control interface;
 
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step;
 
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated;    
 
Voltage to achieve higher step rates;
 
3.3 and 5 V compatible logic supply
 
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay);
 
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection;
 
Short-to-ground and shorted-load protection.
 
 
Subdivision:
 

 
 
 
 
Introduction
 
1: The new original XLSEMI chip, eliminate fake, disassemble chip.
 
2: Imported SMD electrolytic capacitors, not accompanied by homemade capacitance.
 
3: Up to 220Khz operating frequency, and LC filter circuit, output ripple is very low.
 
4: Import TDK inductors, the heat and noise to a minimum.
 
6: Input and output three MLCC Multilayer ceramic capacitors, interference enhance stability.
 
7: PCB use kb of A grade sheet material, to prevent cardboard, garbage plate.
 
8: Built-in MOSFET, the LM2577 built-triode say goodbye, can reach 94% efficiency.
 
9: Increased enable the port, you can control whether the boost circuit.
 
10: Dimensions: 49 (L) * 23.4 (W) * 11.4 (H) mm (excluding potentiometer)
 
 
Parameters
 
Module Properties: non-isolated step-up & down module (BOOST & Buck)
 
Input voltage: 5-32V
 
Output voltage: (1) continuously adjustable (1.2-35V)
 
Output Current: 1.5A (MAX)
 
Input Current: 4A (MAX)
 
Output power: natural cooling 20W, plus heat sink 25W (MAX) real power
 
Maximum output power = input voltage conversion efficiency * 4A *conversion efficiency
 
Conversion efficiency: the efficiency of the measured voltage and current commonly used (hereinafter, for reference only)
 

Embed version of Mega 2560 CH340G/ATmega2560 - compatible with Arduino Mega 2560 board. Built on the Atmel ATmega2560 microcontroller and USB-UART interface chip CH340G.
Board have compact size 38x55mm. It is good solution, to make your final project on solder proto-board.
Board for functionality similar to the Arduino Mega 2560. It is embed board, but the same stable, and uses the original chips ATmega2560 (16 MHz).
The board used the chip CH340G as converter UART-USB. When you work in the frequency 12Mhz, giving a stable result of data exchange (need install drivers to computer).
Mega PRO (Embed) 2560 CH340G / ATmega2560 - connects to the computer via microUSB cable (used for almost all Android smartphones).
You can supply power to board through the MicroUSB connector or to power pinheaders. The voltage regulator (LDO) can deal with incoming voltage from 6V to 9V (peack 18V) DC. Output current for 5V - about 800mA, for 3.3V - about 800mA (Please note that the higher the input voltage the lower the outgoing current). That will provide a reliable power most of your initial projects.

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.
 
Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en
 
 
 
1, the original chip CP2102, generate COM port after installing the driver. 
2, then the standard input MICRO MINI-USB cable connected to the computer USB interface, with 3.3V and 5V two power output 
3, with a resettable fuse. In the event of accidental short-circuit can effectively protect your device and computer USB port to download 
4, on-board status indicators, receiving indicator properly installed drive status indicator remains, send and receive indicator flashes when the communication with run LED indicator. 
5, supports baud rates from 300bps ~ 1Mbps between 
6, the communication format support: 1) data bits 5,6,7,8; 2) support 1.5, 2 stop bits; 3) odd, even, mark, space, none parity 
7, supported operating systems: windows 8.1 / 7 / vista / xp / 98, Mac OS-X / OS-9, Linux 
8, USB seat MICRO MINI-USB interface Block 
9, chip components for the regular company of welding, stable quality, beautiful appearance 
10 with DTR trigger signal output can be directly arduino pro mini ATMEGA328P and other Arduino board download traffic. 
11, module size: 16mm * 20mm super small.
 
 
Features: 
 
1. embedded USB transceiver, no external circuit device 
2. containing clock circuit, no external circuit device 
3. contains power-on reset circuit 
The on-chip voltage regulator within the 3.3V output 
5. Meet the USB2.0 specification requirements 
6.SUSPEND pins support USB suspend state 
7. asynchronous serial data bus compatible with all handshakes and modulation controller interface signals 
8. Support data format is 8 data bits, 1 stop bit and the parity bit 
9. connotation 512 byte receive buffer and 512 byte transmit buffer 
10. Supports hardware or X-ON / X-OFF Handshake 
 
 
 
How to install the driver
 
win7 / win8 
1, first open the package, like the way next, remember installation directory 
2, according to the following method to start the service 
3. Locate the driver in Device Manager, select Update Driver, browse my computer for driver,
select the directory just installed, determine waiting like
 
win8.1
 
Right update drivers automatically find the drivers, it will prompt the driving data is invalid, in fact, the problem often encountered in windows8, the drive is no problem, the beginning has been installed on, and later discovered may be a hardware incompatibility. 
If you are using Windows8 or windows 8.1, but is non-genuine ghost or other systems, and uses a variety of optimization tools Streamlining system, then in the process of installing the driver, you may encounter the "Data invalid" wrong 
"Invalid Data" solutions are as follows:
 
1, press Winkey R on the keyboard, the pop-up "Run" dialog, enter "services.msc",
also by under "Computer Management" window, find the "service"; 
2, found in the list of services "Device Install Service" and "Device Setup Manager" two service items,
make sure these two services is turned on, if not open, you can click the left side of the "Start" service.

 
Description:
Voltage:DC4-7V
Communication interface:Single-wire communication
LED Chip:WS2812B
Conncetion:
5V to 5V
pin 6 to DI
GND to GND
Package Included:
10 X 16 X WS2812 5050 RGB LED

Product description: Parameter: Chip: TPA3110 Condition:XH-A232 Application:Computer Supply Voltage:DC8V-26V Dissipation Power:30W 30W Size:53*45*14mm Channels:2 (2.0) Output impedance:4-8ohm Current: more than 3A Signal to noise ratio: 100db Weight:21g Package Included: 1PC TPA3110 Digital Power Audio Amplifier Board

​Standard: USB2.0 standard, backward compatible, in line with RS485 standard
 
Direction control: automatic data flow control technology, automatic identification and control data transfer direction
 
Baud Rate :300-9216000bps, automatically detect the serial data rate signal
 
Load capacity: supports multipoint, each converter allows connecting 32 RS485 interface device
 
Interface protection: TVS tube protection, USB self-recovery protection
 
Support Windows98/ME/2000/XP/WIN7/Vista, Linux, Mac
 
Supports devices with RS485 interface: surveillance cameras, video capture device, fingerprint attendance machine, PBX, CNC machine, SCM, etc.
 
 
New products, industrial grade USB to 485 modules, 485 chips to facilitate the replacement for the 485 chip hardware debug easy to burn out the case easier to use.
 
USB to 485 programs on the market to analyze the
 
Option One: CH341 485; shortcomings unstable and prone to cause your computer to black;
 
Option Two: PL2303 RS232 RS485; This program is first converted into the serial port using the PL2303, then turn into a serial port 485; advantage of low cost, there may be unstable shortcomings industrial applications, high speed does not fit.
 
Option Three: FT232 485; advantages: industrial-grade applications, speed, anti-jamming capabilities are very good, very suitable for industrial areas, the individual's application. Disadvantages: high cost.

5V Electronic Hourglass DIY Kit

Highlights:
Two independent PWM generators can set the frequency, duty cycle;
The wide frequency range, high accuracy;
Can serial communication.
First, the module description:
Frequency is divided into three ranges:
XXX (no decimal point): the smallest unit is 1Hz, the range 1Hz ~ 999Hz;
XX.X (decimal point in ten): The minimum unit is 0.1Khz; the range of 0.1KHz ~ 99.9KHz
X.X.X. (there are three decimal point): the smallest unit is 1Khz; the range 1KHz ~ 150KHz
Frequency display example:
"100" indicates that the PWM output pulse of 100Hz;
"54.1" indicates that the PWM output pulse of 54.1KHz;
"1.2.4." Indicates that the PWM pulse output 124KHz
Duty Cycle in the range: 0 to 100;
Three frequencies duty cycle is the same, all the parameters non-volatile.
Second, the module parameters:
Working voltage: 5--30V, support micro USB 5.0V power supply;
Frequency range: 1Hz ~ 150KHz;
The frequency accuracy: ± 2% ;
Output Current: <30mA;
Output amplitude: Default 5Vp-p (settable);
Operating temperature range: -30 ~ 70 °.
Third, the parameter settings:
Module has three buttons [Set], [Up], [Down];
Press [Set] key to switch the display four parameters (FR1: PWM1 frequency; dU1: PWM1 duty cycle; FR2: frequency of PWM2; dU2: PWM2 duty cycle), before the handover parameters, there will be corresponding parameter name flash.
Press [Up], [Down] keys to modify the current parameter value (long press can quickly add or subtract fast).
Two PWM each have three preset frequency, the frequency display interface, long press [SET] key to switch between three types of frequencies, three kinds of frequency duty cycle is the same value. (XXX: range 1Hz ~ 999Hz; XX.X: range 0.1Khz ~ 99.9Khz; X.X.X .: range 1Khz ~ 150Khz,).
Fourth, the scope:
As square wave signal generator which generates a square wave signal;
to provide a signal to the stepping motor driver;
Adjustable pulse generation for chip use;
produce variable pulse signal, the control-related circuit (PWM dimming, speed).
Fifth, the serial control
Baud rate: 9600 bps
Data bits: 8
Stop bits: 1
Parity bit: none
Flow control: none
1, set the PWM frequency
"S1FXXXT": setting PWM1 frequency of XXX HZ (001 ~ 999)
"S1FXX.XT": set the frequency of PWM1 XX.X KHZ (00.1 ~ 99.9)
"S1F: X.X.X.T": setting PWM1 frequency of XXX KHZ (0.0.1 ~ 1.5.0..)
'S1': PWM1
'S2': PWM2
'F': Frequency
'D': Duty Cycle
'T' is the end flag
Set the PWM duty cycle
"S1DXXXT": setting PWM1 duty cycle XXX; (001 ~ 100)
"S2DXXXT": set PWM2 duty cycle XXX; (001 ~ 100)
Setting successful return: DOWN;

BBS:   http://forum.mhetlive.com/topic/47/mh-et-live-tiny8-16-0mhz 
 
The MH-ET LIVE Tiny88(16.0Mhz) based microcontroller development board similar  to the Arduino line, only cheaper, smaller, and a bit less powerful. With the ability to use the familiar  Arduino IDE the MH-ET LIVE Tiny88(16.0Mhz) is a great board to jump into electronics, or perfect for when an other board is too big or too much.The MH-ET LIVE Tiny88(16.0Mhz) is shipped fully assembled except for the headersincluded and easy to solder them by yourself.
Specs:
 
Support for the Arduino IDE 1.0 (OSX/Win/Linux)
1. Power via USB or External Source - 5v or 7-35v (12v or less recommended,
automatic selection)
2. On-board 500ma 5V Regulator
3. Built-in USB
4.  26 I/O Pins (2 are used for USB only if your program actively communicates over  USB, otherwise you can use all 6 even if you are programming via USB)
5. 8k Flash Memory (about 6k after bootloader)
6. I2C and SPI
7. 26-PWM (26 pins with Software PWM,only two(D9,D10) with hardware PWM )
8.  ADC on 8 pins
9.  Power LED and Test/Status LED
10. Size(mm):44.5x18.3x3

 
Free Shipping 10x DHT11 DHT-11 Digital Temperature and Humidity Temperature sensor for Arduino Hot
Item Description:
1.DHT series numeric humiture sensor.
2.Humidity measuring range: 20% ~90% RH(0~50degree (temperature compensation).
3.Temperature measuring range: 0~ 50degree.
4.Humidity measurement accuracy: ±5.0% RH.
5.Temperature measurement accuracy: ±2.0degree.
6.response time: <5s.
7.low power consumption.
8.Size:23X12X5.5mm

Description: This is the  RGB and Gesture Sensor, a small breakout board with a built in APDS-9960 sensor that offers ambient light and color measuring, proximity detection, and touchless gesture sensing. With this RGB and Gesture Sensor you will be able to control a computer, microcontroller, robot, and more with a simple swipe of your hand! This is, in fact, the same sensor that the Samsung Galaxy S5 uses and is probably one of the best gesture sensors on the market for the price.
The APDS-9960 is a serious little piece of hardware with built in UV and IR blocking filters, four separate diodes sensitive to different directions, and an I2C compatible interface. For your convenience we have broken out the following pins: VL (optional power to IR LED), GND (Ground), VCC (power to APDS-9960 sensor), SDA (I2C data), SCL (I2C clock), and INT (interrupt). Each APDS-9960 also has a detection range of 4 to 8 inches (10 to 20 cm).

1.This is a breadboard for the LOLIN NodeMCU Development Board ESP8266-12E for Arduino IDE see other listing
2.Please note this has a pin spacing of 28MM between the rows unlike the unit made by DOIT witch is 23 MM
3.This is compatible with the LOLIN NodeMCU not the DOIT device

Product Description:
 
100% brand new and high quality.
Module Properties: Non-isolated step-down module (BUCK)
Rectification: Synchronous rectification
Input voltage: DC 4.75V-23V
Output voltage: DC 1.0V-17V (Adjustable, Output < Input)
Output current: Rated current 1.8A (3A MAX, can not be prolonged)
Conversion efficiency:96% (highest)
Switching Frequency: 340KHz.
Output ripple:30mV(no-load)
Load regulation:±0.5%
Voltage regulation:±2.5%
Operating Temperature: Industrial (-40 ~ 85)
Short circuit protection: No(Please do not short-circuit)
Input Reverse protection: No(Can not be reversed)
22mm*17mm*4mm(L*W*H)/0.87'' * 0.67'' * 0.16'' approx Supper mini board