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MAX9814
The MAX9814 is a low-cost, high-performance microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. Device features a low-noise front-end amplifier, variable gain amplifier (VGA), output amplifier, microphone bias voltage generator and AGC control circuit
 
Specifications:
 
Supply Voltage: 2.7v-5.5v @ 3mA current
Output: 2Vpp on 1.25V bias
Frequency Response: 20Hz - 20 KHz
Programmable Attack and Release Ratio
Automatic gain, selectable max from 40dB, 50dB or 60dB
Low Input-Referred Noise Density of 30nV /
Low THD: 0.04% (typ)
 
Automatic Gain Control (AGC)
3 gain setting (40dB, 50dB, 60dB)
Programmable operation time
Programmable operation and release time than
2.7V to 5.5V supply voltage range
Low input noise density 30nV /
Low THD: 0.04% (typ)
Low-Power Shutdown Mode
Built-2V low-noise microphone bias
Space-saving 14-pin TDFN (3mm x 3mm) Package
 
-40 ° C to 85 ° C extended temperature range
 
 
MAX4466
 
Description: Add an ear to your project with this well-designed electret microphone amplifier. This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, we use the Maxim MAX4466, an op-amp specifically designed for this delicate task!
The amplifier has excellent power supply noise rejection, so this amplifier sounds really good and isn't nearly as noisy or scratchy as other mic amp breakouts we've tried!
This breakout is best used for projects such as voice changers, o recordingmpling, and o-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x.
That's down to be about 200mVpp (for normal speaking volume about 6 inch away) which is good for attaching to something that expects'line level'input without clipping, or up to about 1Vpp, perfect for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp!
Using it is simple:
Connect GND to ground, VCC to 2.4-5VDC.
For the best performance, use the "quietest" supply available (on an for Arduino, this would be the 3.3V supply).
The o waveform will come out of the OUT pin. The output will have a DC bias of VCC/2 so when its
perfectly quiet, the voltage will be a steady VCC/2 volts (it is DC coupled). If the o equipment you're using requires AC coupled o, place a 100uF capacitor between the output pin and the input of your device. If you're connecting to an o amplifier that has differential inputs or includes decoupling capacitors, the 100uF cap is not required.
The output pin is not designed to drive speakers or anything but the smallest in-ear headphones- you'll need an o amplifier (such as 3.7W stereo amp) if you want to connect the amp directly to speakers. If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT pin directly to the microcontroller ADC pin.
For o-reactive projects, we suggest using an FFT driver library which can take the o input and'translate'it into frequencies.
Condition: New
Type: Other
Color: purple
Material: PC Metal

 
MAX9814
The MAX9814 is a low-cost, high-performance microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. Device features a low-noise front-end amplifier, variable gain amplifier (VGA), output amplifier, microphone bias voltage generator and AGC control circuit
 
Specifications:
 
Supply Voltage: 2.7v-5.5v @ 3mA current
Output: 2Vpp on 1.25V bias
Frequency Response: 20Hz - 20 KHz
Programmable Attack and Release Ratio
Automatic gain, selectable max from 40dB, 50dB or 60dB
Low Input-Referred Noise Density of 30nV /
Low THD: 0.04% (typ)
 
Automatic Gain Control (AGC)
3 gain setting (40dB, 50dB, 60dB)
Programmable operation time
Programmable operation and release time than
2.7V to 5.5V supply voltage range
Low input noise density 30nV /
Low THD: 0.04% (typ)
Low-Power Shutdown Mode
Built-2V low-noise microphone bias
Space-saving 14-pin TDFN (3mm x 3mm) Package
 
-40 ° C to 85 ° C extended temperature range
 
 
MAX4466
 
Description: Add an ear to your project with this well-designed electret microphone amplifier. This fully assembled and tested board comes with a 20-20KHz electret microphone soldered on. For the amplification, we use the Maxim MAX4466, an op-amp specifically designed for this delicate task!
The amplifier has excellent power supply noise rejection, so this amplifier sounds really good and isn't nearly as noisy or scratchy as other mic amp breakouts we've tried!
This breakout is best used for projects such as voice changers, o recordingmpling, and o-reactive projects that use FFT. On the back, we include a small trimmer pot to adjust the gain. You can set the gain from 25x to 125x.
That's down to be about 200mVpp (for normal speaking volume about 6 inch away) which is good for attaching to something that expects'line level'input without clipping, or up to about 1Vpp, perfect for reading from a microcontroller ADC. The output is rail-to-rail so if the sounds gets loud, the output can go up to 5Vpp!
Using it is simple:
Connect GND to ground, VCC to 2.4-5VDC.
For the best performance, use the "quietest" supply available (on an for Arduino, this would be the 3.3V supply).
The o waveform will come out of the OUT pin. The output will have a DC bias of VCC/2 so when its
perfectly quiet, the voltage will be a steady VCC/2 volts (it is DC coupled). If the o equipment you're using requires AC coupled o, place a 100uF capacitor between the output pin and the input of your device. If you're connecting to an o amplifier that has differential inputs or includes decoupling capacitors, the 100uF cap is not required.
The output pin is not designed to drive speakers or anything but the smallest in-ear headphones- you'll need an o amplifier (such as 3.7W stereo amp) if you want to connect the amp directly to speakers. If you're connecting to a microcontroller pin, you don't need an amplifier or decoupling capacitor - connect the OUT pin directly to the microcontroller ADC pin.
For o-reactive projects, we suggest using an FFT driver library which can take the o input and'translate'it into frequencies.
Condition: New
Type: Other
Color: purple
Material: PC Metal

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.

Description: Note The item is Enhanced version. Enhanced version: for starting current below 80A, power 135W below the drill.(Not balanced function) 3S 12.6V 40A lithium battery protection board Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery) Product Size: 42 * 55 * 3.4mm (Standard Version / Enhanced Version), 42 * 60 * 3.4mm (Balanced version) Product weight: 8.8g (standard / enhanced version), 9.8g (balanced version) Charging voltage: 12.6V - 13.6V Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use) Continuous charge current (upper limit): 20A Note 1: The successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not start the drill!!). Note 2: strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, do not deliberately short circuit. Note 3: When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. Note 4: 3 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use in series. The The Discharge test, the voltage drop faster battery that group is poor battery. For some of the poor basis of electronic customers to explain: balanced charge is only auxiliary functions, try not to put a good battery and poor battery mixed together! 3 sets of battery capacity / resistance closer to the better! (2 good battery 1 Poor battery use effect = 3 poor battery use effect).

Description: Note The item is Enhanced version. Enhanced version: for starting current below 80A, power 135W below the drill.(Not balanced function) 3S 12.6V 40A lithium battery protection board Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery) Product Size: 42 * 55 * 3.4mm (Standard Version / Enhanced Version), 42 * 60 * 3.4mm (Balanced version) Product weight: 8.8g (standard / enhanced version), 9.8g (balanced version) Charging voltage: 12.6V - 13.6V Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use) Continuous charge current (upper limit): 20A Note 1: The successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not start the drill!!). Note 2: strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, do not deliberately short circuit. Note 3: When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. Note 4: 3 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use in series. The The Discharge test, the voltage drop faster battery that group is poor battery. For some of the poor basis of electronic customers to explain: balanced charge is only auxiliary functions, try not to put a good battery and poor battery mixed together! 3 sets of battery capacity / resistance closer to the better! (2 good battery 1 Poor battery use effect = 3 poor battery use effect).

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

 DC 3V-6V bis 400kV 400000V Boost Step up Power Module High Voltage Generator

Dual USB 5V 1A 2.1A Mobile Power Bank 18650 Battery Charger PCB Power Module Accessories For Phone DIY LED LCD Module Board

 
 
 
 
 
 
 
 
Product Description
 
   CH340G Replace ATMEGA16U2 / CH340G 
   Microcontroller:ATmega2560     
   Operating Voltage:5V     
   Input Voltage (recommended):7-12V     
   Input Voltage (limits):6-20V     
   Digital I/O Pins:54 (of which 15 provide PWM output)     
   Analog Input Pins:16     
   DC Current per I/O Pin:40 mA     
   DC Current for 3.3V Pin:50 mA     
   Flash Memory:256 KB of which 8 KB used by bootloader     
   SRAM:8 KB     
   EEPROM:4 KB     
   Clock Speed:16 MHz

LM2596 LM2596S DC-DC 4.5-40V adjustable step-down power Supply module 
 
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92% ( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ 85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
Features:
1. the range of input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage of 1.5 V above. Can't booster)
2. the range of output voltage: 1.25 V dc to 35 V voltage adjustable, high efficiency (92% ) largest maximum output current is 3A.
 
Instructions:
1. Power (3-40V), power indicator light, the module is working properly.
 
2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.
 
Note:
 
  Current work long hours is recommended for use in less than 2.5A, while adding bulkHeat sink (10W output above),because it is the step-down module, in order to ensure stable output Set,please keep the minimum 1.5V differential.

LM2596 LM2596S DC-DC 4.5-40V adjustable step-down power Supply module 
 
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92% ( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ 85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
Features:
1. the range of input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage of 1.5 V above. Can't booster)
2. the range of output voltage: 1.25 V dc to 35 V voltage adjustable, high efficiency (92% ) largest maximum output current is 3A.
 
Instructions:
1. Power (3-40V), power indicator light, the module is working properly.
 
2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.
 
Note:
 
  Current work long hours is recommended for use in less than 2.5A, while adding bulkHeat sink (10W output above),because it is the step-down module, in order to ensure stable output Set,please keep the minimum 1.5V differential.

SX1276 ESP32 LoRa 868MHz/915MHz 0.96 Inch Blue OLED Display Bluetooth WIFI Lora Kit 32 Development Board

SX1276 ESP32 LoRa 868MHz/915MHz 0.96 Inch Blue OLED Display Bluetooth WIFI Lora Kit 32 Development Board

L298N Module Dual H Bridge Stepper Motor Driver Board Modules for Arduino Smart Car  FZ0407
Product description:
The L298N driver module, using ST L298N chip can directly drive two 3-30V DC motor, and provides a 5V output interface, you can chip circuitry to 5V power supply, support 3.3VMCU control, you can easily control the DC motor speed and direction, you can also control the 2-phase stepper motor, smart car essential.
Product parameters:
1 Driver chip: L298N dual H-bridge driver chip
2 Terminal driver part of the supply area VMS: 5 V ~ 35 V
3 Drive part of the peak current Io: 2A / Bridge
4 Logical part of the terminal power supply range Vss :4.5-5 .5 V
5 Logical part of the operating current range: 0 ~ 36mA
6 The control signal input voltage range: 4.5-5.5V low 0V high
7 Maximum power consumption: 20W
8 Storage temperature: -25 ~ 130
9 Driver Board Size: 55mm * 60mm * 30mm
10 Driver board Weight: 33g
11 Other features: control direction indicator, power indicator, current detection, logical part of the plate to take power interface.
Package included:
10 x L298N Module

 
Conversion can use a few chips is 1.8 V, such as winbond w25q64, macro mx25u1635 flourishing, mx25u6435 etc to burn written in 3.3 V programmer for conversion. These chips are normally used for apple computer motherboard.
 
Applicable as main 1.8 V chip:
winbond
W25q10ew w25q20ew, w25q20bw w25q40ew, w25q40bw, w25q80ew, w25q80bw, w25q16dw, w25q16fw, w25q32dw, w25q32fw, w25q64dw, w25q64fw, w25f128fw
In the macro
Mx25u5121e mx25r512f, mx25u1001e mx25r1035f, mx25u2033e, mx25r2035f, mx25u4035,
Mx25u4033e mx25u4032e, mx25r4035f mx25u8035, mx25u8035e, mx25u8033e, mx25u8032e,
Mx25r8035f mx25u1635e, mx25v1635f mx25u1635f, mx25r1635f, mx25u3235e, mx25u3235f,
Mx25r3235f mx25u6473f, mx25u6435f mx25r6435f, mx25u12873f, mx25u12835f,
Mx25u25635f mx25u51245g, mx25um51245g mx66u51235f
Such as...
​
Conversion can use a few chips is 1.8 V, such as winbond w25q64, macro mx25u1635 flourishing, mx25u6435 etc to burn written in 3.3 V programmer for conversion. These chips are normally used for apple computer motherboard.
 
Applicable as main 1.8 V chip:
winbond
W25q10ew w25q20ew, w25q20bw w25q40ew, w25q40bw, w25q80ew, w25q80bw, w25q16dw, w25q16fw, w25q32dw, w25q32fw, w25q64dw, w25q64fw, w25f128fw
In the macro
Mx25u5121e mx25r512f, mx25u1001e mx25r1035f, mx25u2033e, mx25r2035f, mx25u4035,
Mx25u4033e mx25u4032e, mx25r4035f mx25u8035, mx25u8035e, mx25u8033e, mx25u8032e,
Mx25r8035f mx25u1635e, mx25v1635f mx25u1635f, mx25r1635f, mx25u3235e, mx25u3235f,
Mx25r3235f mx25u6473f, mx25u6435f mx25r6435f, mx25u12873f, mx25u12835f,
Mx25u25635f mx25u51245g, mx25um51245g mx66u51235f
Such as...

 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:
 

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

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
 
This DC Motor   Speed Controller allows controlling the direction of a DC motor using a   Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully   adjustable from 0% -100% .
                   
The motor speed controller can easily provide a continuous current of3A to your DC motor or other DC load.
                   
Main technical parameters:
                   
Input supply voltage:6V-28VDC
                     |
The maximum output power: 80W
                   
The maximum continuous output current :3A
                   
Duty Cycle adjustable:5% -100%

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

Item name: HMC5883L module (three-axis magnetic field module)
Model: GY-273
Chips: HMC5883L
Communication: IIC communication protocol
Measuring range: ± 1.3-8 gauss
Specifications:
Power supply :3-5V
Size: 1.8 x 1.3 cm
Net weight:17g
Package weight:27g
Color:As shown in the pictures
Package included:
10PCSx HMC5883L Triple Axis Compass Magnetometer Sensor Module For Arduino 3V-5V

 
Feature: Receiver sensitivity reach -116dBm Operating frequency:433.92 MHz Power supply voltage input range: 3V-5.5V Low power consumption, 3.3V @ 433.92MHz, 6.0mA Power Enable mode power consumption can be done lowest 50nA has an analog RSSI signal strength level output Good selectivity and spurious radiation suppression, and easy through CE / Fcc international certification Good local oscillator radiation suppression, multiple receiver modules to work together (ie, more than single income) and will not interfere with each other, used together does not affect the receiving distance. Temperature range: -40-85 Degrees Celsius can work even in harsh ambient temperature. Application: Car remote door switch (RKE) Remote control door opener Wireless security alarm Remote control curtains The wireless industrial controller A wireless data transmission.

NTC 3950 Thermistors for 3D Printer Reprap Mend For 3D Printer Hot bed MK2a MK2b

ESP-12E motor drive expansion board
 
Description:
 
Based on the first motor-driven expansion board ESP-12E development.
 
Features:
 
l ESP12 DEV KIT development board expansion module;
 
l lead ESP12 DEV KIT All-function pins: SPI, UART, GPIO, AI and 3.3V power connector;
 
l expand two-way motor-driven, two-way direct drive motor;
 
l onboard power switch;
 
l L293D
 
l Motor power range: 4.5V ~ 36V;
 
l Control power range: 4.5V ~ 9V;
 
l 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.

Description:
DIY Kits
1 single module can drive the an 8 * 8 dot matrix common cathode
2 the module Operating voltage: 5 v
The Module 3 dimensions: length 3.2 cm X 3.2 cm wide X 1.3 cm high
4 holes with four screws, the diameter of 3 mm
Five modules with input and output interfaces, support for cascading multiple modules
Wiring instructions:
1 on the left block to an input port, the an output port on the right.
2 the When the control of a single module, simple enter the port received a CPU
The When wining 3 modules cascaded output input termination CPU, the input output termination module of the first two modules of the first one, the first two modules of the termination input terminal of the three modules, and so.
The To 51 single example:
VCC 5 v
GND GND
DIN P2.2
CS P2.1
CLK P2.0

Name: MPU-6050 modules (three-axis gyroscope three-axis accelerometer)
Use the chip: MPU-6050
Power supply :3-5v (internal low dropout regulator)
Communication modes: standard IIC communications protocol
Chip built-in 16bit AD converter, 16-bit data output
Gyroscope range: ± 250 500 1000 2000 ° / s
Acceleration range: ± 2 ± 4 ± 8 ± 16g
Immersion Gold PCB machine welding process to ensure quality
Pin pitch 2.54mm

Product Description Hardware Specifications Chipset ESPRESSIF-ESP32 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor FLASH QSPI flash 4MB / PSRAM 8MB SRAM 520 kB SRAM Button Reset USB to TTL CP2104 Modular interface UART.SPI.SDIO.I2C.LED PWM.TV PWM.I2S.IRGPIO.capacitor touch sensor.ADC.DACLNA pre-amplifier On-board clock 40MHz crystal oscillator Working voltage 2.7V-3.6V Working current About 70mA Sleep current About 300uA SIM card Only supports Nano SIM card Working temperature range -40° ~ 85° Size&Weight 78.83mm*28.92mm*8.06mm(11.77g) Power Supply Specifications Power Supply USB 5V/1A Charging current 500mA Battery 3.7V lithium battery JST Connector 2Pin 1.25mm USB Type-C Wi-Fi Standard FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC(esp32 chip) Protocol 802.11 b/g/n(802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4μS Protection interval Frequency range 2.4GHz~2.5GHz(2400M~2483.5M) Transmit Power 22dBm Communication distance 300m Bluetooth Protocol meet bluetooth v4.2BR/EDR and BLE standard Radio frequency with -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH Audio frequency CVSD&SBC audio frequency Software specification Wi-Fi Mode Station/SoftAP/SoftAP Station/P2P Security mechanism WPA/WPA2/WPA2-Enterprise/WPS Encryption Type AES/RSA/ECC/SHA Firmware upgrade UART download/OTA(Through network/host to download and write firmware) Software Development Support cloud server development /SDK for user firmware development Networking protocol IPv4.IPv6.SSL.TCP/UDP/HTTP/FTP/MQTT User Configuration AT Instruction set, cloud server, android/iOSapp OS FreeRTOS More Information:https://github.com/Xinyuan-LilyGO/TTGO-T-Call

This is a super mini Solar Lipo charger based on the CN3065 - a single lithium battery charge management chip.
This Solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is easy as well, just plug your solar panel into one side of the Solar charger and your battery into the other and you are good to start charging!
The output of the Solar Charger is intended to charge a single polymer lithium ion cell. The load should be connected in parallel with the battery. By default, the Solar charge comes set to a maximum charge current of 500mA with a maximum recommended input of 6V (minimum 4.4V). It’s recommended that batteries not be charged at greater than their capacity rating.
Features:
Solar panel input: 4.4-6V
Max charge current: 500mA
Interface: 2-pin JST connectors(or PH2.0)
Short circuit protection
Continuous Charge Current Up to 500mA
Battery status indication ( Red : Charging , Green: Charged )
Support USB Charge (Micro-USB Connector)
Size:2cm x 4cm
 

Introduction
 
Features
 
Beam Angle: 120˚
 
Precondition : JEDEC Level 2a
 
Dimension : 5.6 x 3.0 x 0.8 mm
 
ESD withstand Voltage : up to ± 5KV [HBM]
 
MODEL   NAME : SPBWH1532S1ZVCBIB
 
 Manufacturer  :   SAMSANG
 
 Package  Model:Loaded Quantity  10000PCS  Per  Reel
 
  Forward Current      (IF ): 180mA
 
  Pulse Forward  Curren t1     (IFp): 300mA
 
  Reverse  Current    (IR):uA
 
  Reverse Voltage   (VR):0.7-1.2V  (5mA)
 
  Power Dissipation  (PD): W
 
  Operatin  Tgemperature   (Topr):      - 40   85C °
 
Storage Temperature   (Tstg):  -40  -   120 C °
 
   Soldering Temperature     (Tsld):  Reflow Soldering:260 C °
for 10secs
 
Hand Soldering:350C °
 
for 3secs
 
  Junctio  Tnemperature   (Tj ):  C °
 
  Forward  Voltage   (VF):   2.7-3.2V  (65mA)
 
  Luminous Flux    (LM):     28.5-30.5LM  (65mA)  
 
  Wavelength    (nm) :  nm      (65 mA)
 Emissions-farbe Color of  Emission :  
 
  Color Correlated Temperature    (CCT):  K
 
  CRI  :   80°
 
  Viewing angle :  120°

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
 
 
 

2 channel relay module 
 
1 Dimensions: 50.5mm (length) * 38.5mm (W) * 18.5 (H) 
 
2 Weight:. 31g 
 
3.PCB Color: Black 
 
4 board four weeks with four screws holes, hole diameter 3.1mm, easy to install and fixed 
 
5 relay of high quality loose music relays SPDT. A common terminal, a normally open, one normally closed terminal 
 
6 optocoupler isolation, good anti-jamming 
 
 
7 low pull, high release. Energisation status indicator light, release status LED is off 
 
8.VCC of system power, JD_VCC relay power. You can plug in jumpers 
 
Electrical parameters: 
Supply voltage: 5VDC, 12VDC 
Current: more than 100mA 
Load: 250V 10A AC or 30V 10A DC 
 
 
Wiring: 
 
VCC: positive power supply system 
 
GND: System power negative 
 
IN1 - IN2: relay control ports

Probe DS18B20 temperature sensor chip using original
High quality stainless steel pipe anti- rust waterproof package
Stainless steel housing (6 * 50mm), lead length 100cm
After rigorous testing each probe individually wrapped
3.0V ~ 5.5V power supply
9 to 12 adjustable resolution
Temperature range -55 ° ~ 125 °
No external components , the unique single- bus interface
Output leads : Red (VCC), yellow (DATA), black (GND)

Probe DS18B20 temperature sensor chip using original
High quality stainless steel pipe anti- rust waterproof package
Stainless steel housing (6 * 50mm), lead length 100cm
After rigorous testing each probe individually wrapped
3.0V ~ 5.5V power supply
9 to 12 adjustable resolution
Temperature range -55 ° ~ 125 °
No external components , the unique single- bus interface
Output leads : Red (VCC), yellow (DATA), black (GND)

Probe DS18B20 temperature sensor chip using original
High quality stainless steel pipe anti- rust waterproof package
Stainless steel housing (6 * 50mm), lead length 100cm
After rigorous testing each probe individually wrapped
3.0V ~ 5.5V power supply
9 to 12 adjustable resolution
Temperature range -55 ° ~ 125 °
No external components , the unique single- bus interface
Output leads : Red (VCC), yellow (DATA), black (GND)

The power amplifier circuit board designed using the official standard, the chip uses a selection of US imports original Longding micro Class D amplifier chip. Good product chip is necessary and the majority of music lovers to share, this is our consistent philosophy! The amplifier with ultra-high efficiency, large power, in the case of 12V power supply can output 10W 10W of power, the chip without fins, but also with overheating, over-current protection function, the function can be said to be very powerful.
 
The amplifier board is still difficult to drive two 15W speakers, high efficiency Class D amplifier board pure is not blown out, the most suitable for small rooms listening to music use.
You need to use a large heat sink when using Spike TDA2030 amplifier chip board, TDA2030 (15W 15W) This traditional 15W amplifier board to drive two speakers, and high-efficiency Class D PAM8410 pure amplifier board need only drive two 15W speakers Use a small heat sink, high efficiency super power, the sound quality is great.
 
Modification:
 
1. Analog Microelectronics America's original PAM8610 chip as amplifier chip, power can reach 10W 10W.
 
2. As pure class D amplifier board power requirements is relatively high, the exclusive use of the power amplifier board enthusiast 2200UF capacitor filter, the elimination of exchange voice, without interference, pure sound quality.
 
3. Using automatic placement machine production, the board is more beautiful.
 
4. Strip 5.5X2.5 standard power outlet, power input is very convenient. (Positive outside and negative inside)
 
Recently found to have bad business to buy this product to copy, workmanship, PCB design, and capacitor materials are not as ours, we have absolute import original IC, coupled with excellent PCB design and machine placement soldering, stable and reliable performance.
Pure Class D chip without fins can open detonation music, and now we have to chip plus a heat sink, you do not have to worry about overheating. !
 
Overview:
When the power supply voltage of DC 8V-12V, PAM8610 be able to 4Ω load 10W 10W output power, high-quality sound.
 
 
Technical Parameters:
Power: typically 10W
Voltage: DC DC8V-12V
Can drive speakers: 10W-15W, 4 -8 Euro Euro
 
Built-in power-impact sound canceling circuit, no power on impact sound
 
 
Physical picture:
 
 
 
 Compact board, 3.5MM stereo audio input interface, audio input with a standard easy. With fully enclosed volume control potentiometer, can be arbitrary adjust the volume, use and installation are very flexible and convenient
 
 
 
Use American Power Analog Microelectronics original PAM8610 pure Class D amplifier chip as the power amplifier IC, the maximum it can provide to 10W 10W of power, incredible sound.
 
PCB component placement tidy line with US FCC standards, all using genuine components using devices capable of long-term stability.
 
 
Heart-highlight fine arts star Electronic Manufacturing insist that only new element was the market mature products, please rest assured purchase.
 
 
 
 
 
Use enthusiast 2200UF capacitor, ensure pure sound quality.
 
Board size: Long 40mmX (excluding protruding parts of the volume potentiometer, etc.) wide by 19 40mmX
 
 
 
 
 
 
 
 Subjective sound experience:
 
     PAM8610 (10W) power to the PAM8406 (6W) bigger, more powerful speaker can drive, found this amplifier board can drive two 25W speakers.
Listen really surprised, it is hard to believe that such a small piece of the chip can be issued so great volume, stereo effect is very good, indicating a high degree of chip channel separation. Case of playing music, the performance was better than expected, chip minimal heat, the sound was amazing, more transparent treble, bass, or a certain amount, quality count in a small amplifier board in the upper level, listen to music from a very comfortable .

The power amplifier circuit board designed using the official standard, the chip uses a selection of US imports original Longding micro Class D amplifier chip. Good product chip is necessary and the majority of music lovers to share, this is our consistent philosophy! The amplifier with ultra-high efficiency, large power, in the case of 12V power supply can output 10W 10W of power, the chip without fins, but also with overheating, over-current protection function, the function can be said to be very powerful.
 
The amplifier board is still difficult to drive two 15W speakers, high efficiency Class D amplifier board pure is not blown out, the most suitable for small rooms listening to music use.
You need to use a large heat sink when using Spike TDA2030 amplifier chip board, TDA2030 (15W 15W) This traditional 15W amplifier board to drive two speakers, and high-efficiency Class D PAM8410 pure amplifier board need only drive two 15W speakers Use a small heat sink, high efficiency super power, the sound quality is great.
 
Modification:
 
1. Analog Microelectronics America's original PAM8610 chip as amplifier chip, power can reach 10W 10W.
 
2. As pure class D amplifier board power requirements is relatively high, the exclusive use of the power amplifier board enthusiast 2200UF capacitor filter, the elimination of exchange voice, without interference, pure sound quality.
 
3. Using automatic placement machine production, the board is more beautiful.
 
4. Strip 5.5X2.5 standard power outlet, power input is very convenient. (Positive outside and negative inside)
 
Recently found to have bad business to buy this product to copy, workmanship, PCB design, and capacitor materials are not as ours, we have absolute import original IC, coupled with excellent PCB design and machine placement soldering, stable and reliable performance.
Pure Class D chip without fins can open detonation music, and now we have to chip plus a heat sink, you do not have to worry about overheating. !
 
Overview:
When the power supply voltage of DC 8V-12V, PAM8610 be able to 4Ω load 10W 10W output power, high-quality sound.
 
 
Technical Parameters:
Power: typically 10W
Voltage: DC DC8V-12V
Can drive speakers: 10W-15W, 4 -8 Euro Euro
 
Built-in power-impact sound canceling circuit, no power on impact sound
 
 
Physical picture:
 
 
 
 Compact board, 3.5MM stereo audio input interface, audio input with a standard easy. With fully enclosed volume control potentiometer, can be arbitrary adjust the volume, use and installation are very flexible and convenient
 
 
 
Use American Power Analog Microelectronics original PAM8610 pure Class D amplifier chip as the power amplifier IC, the maximum it can provide to 10W 10W of power, incredible sound.
 
PCB component placement tidy line with US FCC standards, all using genuine components using devices capable of long-term stability.
 
 
Heart-highlight fine arts star Electronic Manufacturing insist that only new element was the market mature products, please rest assured purchase.
 
 
 
 
 
Use enthusiast 2200UF capacitor, ensure pure sound quality.
 
Board size: Long 40mmX (excluding protruding parts of the volume potentiometer, etc.) wide by 19 40mmX
 
 
 
 
 
 
 
 Subjective sound experience:
 
     PAM8610 (10W) power to the PAM8406 (6W) bigger, more powerful speaker can drive, found this amplifier board can drive two 25W speakers.
Listen really surprised, it is hard to believe that such a small piece of the chip can be issued so great volume, stereo effect is very good, indicating a high degree of chip channel separation. Case of playing music, the performance was better than expected, chip minimal heat, the sound was amazing, more transparent treble, bass, or a certain amount, quality count in a small amplifier board in the upper level, listen to music from a very comfortable .

MQ-135 Air quality and hazardous gas detection sensor alarm module MQ135 module

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.