Kereskedelmi, irodai és ipari

1. All components are selected from new first-class products, and the input and output terminals are selected with high-current terminals, which are very convenient for wiring.
2. The op amp uses NE5532P (OPA2604AP can be upgraded), and the IC seat can be replaced at any time. Feel the effects of different op amps and improve the playability.
3. The LED indicator light is designed to monitor the power status in real time.
4. The PCB of this board is designed for double-sided wiring, which is simple and beautiful, and the wiring is reasonable, which makes the board have a very high signal-to-noise ratio and strong anti-interference ability. Almost no noise can be heard near the speaker when there is no signal input. No noise can be heard.
Power supply voltage: DC10-30V single power supply direct current
Frequency range: 22Hz-300Hz
Audio Input: Mono or Dual
Audio output: Mono
PCB specification: 85x32mm, thickness: 1.6mm
PCB material: super hardness FR-4 glass fiber board
Board fixing hole center spacing: 78x24mm, hole diameter: 3.5mm
Potentiometer shaft center spacing: 32.5mm
Chip-level power amplifier: There is basically no place to debug the pre-stage, post-stage, and front and rear integrated machines. The manufacturer of the internal parameters of the chip has set the normal values. As long as the parameters of the peripheral components are normal and there are no welding errors, the success rate is very high. The effect is also very good.

LauraDeal Big saving Solderless Breadboard Protoboard 4 Bus Test Circuit Board Tie-point 1660 ZY-204 Newly!!
 
 
 
 
Features:                                                                                                                                                                                    
Brand new and high quality.
2 Terminal Strip, Tie-point 1260.
4 Distribution strips, Tie-point 400.
3Binding Posts.
ABS plastic material.
Black aluminum plate.
Completely reusable.
Coloured coordinates for easy component placement.
Phosphor bronze nickel plated spring clips.
Accepts a variety of wire sizes (29-20 AWG).
Close size:21.5cm x 13cm - 8.46inch x 5.12inch.
Package Included:
1 x Solderless Breadboard 1660
NO Retail Box. Packed Safely in Bubble Bag.
Packaging Details
Unit Type:
piece
Package Weight:
0.300kg (0.66lb.)
Package Size:
50cm x 30cm x 20cm (19.69in x 11.81in x 7.87in)
 

The listing cable in the picture is black 1M, the current cable is blue 30CM

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XH-M542 DC 12-26V 100W TPA3116DA Mono Channel Digital Power Audio Amplifier TPA3116D2 Board

Specifications:
Supply Voltage: 1.8 - 5V DC
Interface: I2C (up to 3.4MHz), SPI (up to 10 MHz)
Operational Range:
Temperature: -40 to 85°C
Humidity: 0-100%
Pressure: 300-1100 hPa
Resolution:
Temperature: 0.01°C
Humidity: 0.008%
Pressure: 0.18Pa
Accuracy:
Temperature: -1°C
Humidity: -3%
Pressure: -1Pa
I2C address
SDO LOW : 0x76
SDO HIGH: 0x77

BME280, the precision sensor from , is soldered onto PCB.
Not only the pressure and the temperature, this sensor can measure humidity.
It uses both I2C and SPI (supports 3-, 4-wire SPI) interface
 
Specifications:
Supply Voltage: 1.8 - 5V DC
Interface: I2C (up to 3.4MHz), SPI (up to 10 MHz)
Operational Range:
Temperature: -40 to 85°C
Humidity: 0-100%
Pressure: 300-1100 hPa
Resolution:
Temperature: 0.01°C
Humidity: 0.008%
Pressure: 0.18Pa
Accuracy:
Temperature: -1°C
Humidity: -3%
Pressure: -1Pa
I2C address
SDO LOW : 0x76
SDO HIGH: 0x77

If you need a USB cable, the shop has a link for the USB cable
CH340G Replace FT232RL
Operating Voltagelogic level:5V
8 analog inputs ports:A0 ~ A7
14 Digital input / output ports:TX,RX,D2 ~ D13
6 PWM ports:D3, D5, D6, D9, D10, D11
1 pairs of TTL level serial transceiver ports RX / TX
Using Atmel Atmega328P-AU MCU
There is bootloader installed in it
Support USB download and Power
Support for external 5V ~ 12V DC power supply
Support power supply by 9V battery
Package Included:
1 x USB Nano V3.0 ATmega328 16M 5V Micro-controller CH340G board For Arduino

If you need a USB cable, the shop has a link for the USB cable
CH340G Replace FT232RL
Operating Voltagelogic level:5V
8 analog inputs ports:A0 ~ A7
14 Digital input / output ports:TX,RX,D2 ~ D13
6 PWM ports:D3, D5, D6, D9, D10, D11
1 pairs of TTL level serial transceiver ports RX / TX
Using Atmel Atmega328P-AU MCU
There is bootloader installed in it
Support USB download and Power
Support for external 5V ~ 12V DC power supply
Support power supply by 9V battery
Package Included:
1 x USB Nano V3.0 ATmega328 16M 5V Micro-controller CH340G board For Arduino

Purchase instructions:
Wireless charging = transmitter receiver (2 can only be charged together)
1. Wireless charging: if your phone is iphone 8/8 plus /X or samsung s6/57 /S859/Note5/Note8, etc., it already has a built-in "receiver ";Or if you've already bought the receiver, you can just buy the transmitter and charge it.
2. Mobile phone does not have wireless charging function: if your mobile phone does not have "receiving end (patch) ", you need to buy" transmitting end (base) receiving end (patch) "to charge.
 
 
Parameters:
 
1. Input power supply: 5V,2A or 9V，2A;
output power :5W 10W
2. Product specifications: as shown below
3. Product weight: 0.09kg
4. Charging efficiency: > 70%
5. Transmission distance: within 8mm
6. Execution standard: Qi wireless charging standard
7. Product certification: CE/FCC/RoHS

Sensor board: 29.9*15mm
Probe: 88mm
Color: black
Material: ABS, metal
Features:
< Sensor: The probe uses analog resistance to detect the moisture content of the soil.
< Digital value output: This soil moisture detector outputs a low level from the DO port when the detecting humidity reaches the threshold value.
< Analog value output: The AO port on the soil humidity sensor outputs analog value(voltage), and you can acquire the real-time data via the AD port of your single-chip microcomputer(MCU).
< Corrosion resistant  probe: A waterproof sensor probe with high corrosion resistance ensures a long lifetime.
< Application:  Good plant helper to make you know if your plants are thirsty and can be used in the automatic watering system, garden, greenhouse and so on.
Notes:
1. Please allowed 1-3mm differences due to manual measurement, thank you for your understanding!
2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.
Package list:
1 x Soil Moisture Sensor Module
1 x Sensor Probes
 

Download address:http://github.com/espressif/arduino-esp32
Features:
 
-DC 5V-12V 
-1 analog input(3.2V max input)
-a Micro USB connection
-Compatible with For Arduino
-D1 R32=WiFi Bluetooth UNO
 
 
Package included:
 
 
1 x ESP32 WiFi Bluetooth Board 4MB Flash UNO D1 R32

Overview:
USB to RS232 conversion cable for USB and serial devices easily connect serial devices with features such as Plug and play, hot-swappable. Can meet the notebook connected serial device, apply to mini-phones, digital cameras, communication MODEM, ISDN terminal adapters, LED control card
Features:
Single crystal 12M Tablet 340 USB port to serial port communication
USB1.1/2.0 compliant solution
Built-in 128 byte TX/512 byte RX buffer
Supports auto-Handshake Protocol
Support Win95/98/98se/ME/2000/XP/win7 32bit 64bit/Vsita/supports full speed USB data transfer protocol
Design of electro-magnetic interference
Data Exchange application

Pro Mini atmega328 3.3V 8M Replace ATmega128 Compatible FZ0104
The Professional Mini Pro is a microcontroller board. It has 14 digital input/output pins (6 of which can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, and mounting hole pin headers.
Technical Parameters:
1. 14 digital input/output ports RX, TX, D2~D13,
2. 8 analog input ports A0~A7
3. 1 pair of TTL level serial port transceiver port RX/TX
4.6 PWM ports, D3, D5, D6, D9, D10, D11
5. Using Atmel Atmega328P-AU microcontroller
6. Support serial port download
7. Support external 3.3V~12V DC power supply
8. Support 9V battery power supply
9. Clock frequency 8MHz
10. Size: 33.3*18.0 (mm)

Product Features:
1. Heating mode 'H':
When the detected temperature is less than or equal to the set temperature - the hysteresis temperature, the relay is turned on, and the heating equipment starts to work;
When the detected temperature ≥ the set temperature, the relay is disconnected and the heating equipment stops working;
2. Cooling mode 'C':
When the detected temperature ≥ set temperature hysteresis temperature, the relay is turned on, and the refrigeration equipment starts to work;
When the detected temperature is less than or equal to the set temperature, the relay is disconnected and the refrigeration equipment stops working;
3. High temperature alarm function ALA:
When the actual temperature is greater than or equal to the alarm temperature, the system will turn on the sound and light alarm, disconnect the relay, and stop the sound and light with any key;
4. Delay start OPH:
When a normal heating or cooling work is completed, the system starts timing T, and only when T≥OPH can the system perform the next round of heating or cooling work;
5. Temperature correction function OFE (-10.0~10.0℃):
When the system works for a long time, there may be deviations, which can be corrected by this function, the actual temperature = measured temperature calibration value;
6. Parameter remote read/set:
Parameters such as start temperature, stop temperature, and temperature correction can be set through UART;
7. Real-time temperature report:
If the temperature reporting function is enabled, the product will transmit the detected temperature to the terminal through UART at 1s intervals, which is convenient for data collection;
8. Relay enable (default on):
If the relay enable is turned off, the relay remains disconnected;
9. Factory reset:
Press the STOP and SET keys at the same time for more than 3S to restore the factory settings;
Working mode/setting temperature/return temperature setting:
1. In the running interface, short press the SET button to enter the quick setting interface;
2. After entering the quick setting interface, short press the SET button to switch the parameters to be set (working mode/set temperature/return temperature);
3. Through the UP DOWN key, modify the parameter value, support short press/long press;
4. Press and hold SET for more than 3S or continue for 6S without any key operation, exit the quick setting interface, and save the parameters;

Colour:green Material:ABS Input voltage: DC10-50V. Output voltage: Load Linear. Input Current: require large than the motor operating current.Colour:green
Material:ABS
Input voltage: DC10-50V.
Output voltage: Load Linear.
Input Current: require large than the motor operating current.
Output Current: determine load size.
Continuous current: 40A within.
Maximum power: 2000W.
Knob hole: 7mm.
Speed type: modulated current.
Speed mode: ON \ OFF linear potentiometer 270 degrees.
Speed range: 0-100% .
Operating frequency: 25KHZ.
Forward Reverse: Support.
Size: 100 * 76 * 28 mm(L*W*H).
Weight: 180g.
Package Contents:1 X Brushed DC motor controller
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is /- 1-3cm.

XY-APWM Full-function PWM Pulse Frequency Duty Cycle Adjustable Module Square Wave Rectangular Wave Signal Generator
Features:
1.The duty cycle, frequency and amplitude can be adjusted, and the upper and lower limits can be set.
2.You can customize the default parameters (duty cycle/frequency/amplitude) when the main interface press the 'increase'or 'decrease' button.
3.Dual mode, fine mode duty cycle step 0.1% .
4.LCD display frequency, duty cycle and amplitude, very clear, with ON/OFF keys, very convenient to use.
5.With locking function to prevent misoperation.
6.This product can be used as a 3W power supply.
7.All parameters are saved after power failure.
Descriptions:
1.This is a XY-APWM full-function PWM pulse frequency duty cycle adjustable module.
Specifications:
Material:Plastic Metal
Color: Black
Power supply voltage: DC3.5~12V
Output voltage OUT (amplitude voltage): DC1.0V~24.0V power 3W (this product can be used as a power 3W CNC power supply)
Frequency range: 1 Hz~150 KHz in general mode, 1 HZ~15 KHZ in fine mode
Frequency accuracy: the accuracy in each range is about 2%
Signal load capacity: the output current can be about 5~30 Ma (Note: This product is the output of PWM signal, can not directly drive high-power load);
Output amplitude: DC1.0V~24.0V adjustable
Ambient temperature: -20~ 70°
Scope of application:
1.Used as a square wave signal generator to generate square wave signals for experimental development and use;
2.Square wave signal used to control motor driver;
3.Generate adjustable pulses for MCU use.
4.Generate adjustable pulses and control related circuits (PWM dimming and speed regulating applications).
Package Informations:
Package Size: 100x50x50mm/3.9x1.95x1.95in
Package Weight: 70g/2.45oz
General Box Package
Package Included:
1 x Signal Generator
 

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:17 g
Package weight:27 g
Color:As shown in the pictures
 
 
 
Note: It is Domestic Chip HMC5883, the program is not compatible with the original imported chip program,  we can provide Matching routine ！
 

USB to RS485 Converter Adapter
USB connector: to your PC
RS485 connector: to your RS485 device
No need external power, powered by USB port
Fully compliant USB 2.0 standard , backward compatible with USB1.1
Specification:
Support System: Windows XP , Vista, Windows 7 , Linux , MacOS , and WinCE5.0 drive
Supports baud rate range : 75bps - 115200bps , up to 6Mbps
Work temperature range: -40°C ~ 85°C
Communication distance :1200m(max)
Dimension:6.1x1.6x1.3cm
Color: Black
Applications:
All kinds with RS485 port device parameter settings , data communication
Short distance , such as parameter settings of the computer peripheral equipment , the use of common data lines can be .
• LED display of communication data
• Machine PLC data reading and writing
• Monitoring data read and write , and PTZ control
• centralized control of household electrical appliances
• Access Control System ; card
• a variety of industrial automation ; instrumentation
• Parking ; bus fees
• Dining Hall ; staff attendance
• highway toll station; ATM machine
Packing
USB to RS485 Converter x 1PCS

JSN or AJ Sent at random
the module performance and stability, measure the distance accurately. Can and abroadSRF05, SRF02Such as ultrasonic ranging module comparable.Module high-precision, blind (25cm), stable range is the success of this product to the market a strong basis.
OElectrical performance:
Lead length 2.5M
OProduct Features:
1, Small size, easy to use;
2, Low voltage, low power consumption;
3, High measurement accuracy;
4, Strong anti-interference;
5, Integrated closed water with a line probe for wet, harsh measurement occasions.
OApplications:
1, the horizontal range;
2, obstacle avoidance, automatic control;
3, Objects close, there is perceived
4, traffic control;
5, security, industrial control;
6, Artificial intelligence, teaching and research
The basic working principle:
(1)Using IOTRIGTrigger ranging, to at least 10us high-level signal;
(2)The module automatically sends8A 40khz square wave, automatically detect whether there is signal return;
(3) There is a signal return via IOECHOOutput oneAHigh, high duration is the time from the launch of the ultrasound to the return.Test distance = (high time * sound speed (340M / S)) / 2;
The use of this module is simple, a control mouth made a 10US above the high level, you can wait for the reception of high-level output. An output can be opened timer time, when the mouth becomes low when you can read The value of the timer, this time for the distance of time, can calculate the distance. Such a continuous cycle measurement, which can be measured to achieve the value of your move.

specification: Working voltage: 9V-55V ■ Output voltage: linear under load ■Maximum current: 40                        ■Continuous current: 35A ■Speed range: 0% - 100% ■ Wiring method: Barrier terminal block ■PWM frequency: 15KHZ ■Static current: 0.01A (standby state) ■Speed control mode: potentiometer (with switch) ■Speed type: flow adjustment ■ Motherboard size: Length 83MM*56MM*28MM ■Product net weight: 90 grams package 1x PWM DC motor governor 12V24V36V48V high power 40A

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Model Name
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8W high power DC-DCBoost module
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Input voltage
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3V~6V
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The output voltage
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12V (Other voltage values can be customized in batch)
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Output Power
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8W
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size
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24*15*7MM
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product description:
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The onboard LED indicator light adopts imported chips from Taiwan, the low starting voltage is 2.5V, the working voltage is 3-6V, and the high input current is 3A;
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whenMobile power 5V2A input, output is 8W, can drive 12V0.8A equipment, 3.7V lithium battery input, output is 6W, can drive 12V0.5A

1. The onboard MAX3485 chip is a low-power, slew rate-limited transceiver for RS-485 communication
2. On-board connection to 2.54mm pitch wiring pin header
3. With serial port pins and direction control pins
4. Working voltage: 3.0-3.6V (low power consumption)
5. Board size: 19.3(mm)x13.3(mm)
Plate features:
This module can be used when the serial port is not enough. Combined with this module, multiple single-chip serial ports can be formed into a network, that is, the serial ports can communicate in parallel, and send and receive data according to different addresses. At the same time, the communication distance is greatly improved. In the RS485 protocol, the maximum communication distance can reach 1000 meters according to different wires. Therefore, the use of serial port TTL level to RS485 communication meets most of the application requirements in terms of network and distance.
Shipping list
1. One RS485 module.

Basic parameters:
[Voltage range] DC5V-12V
[rated current] ≤ 800mA
[Power reverse connection protection] yes
[Overcurrent protection] yes
[overheat protection] yes
[1] Normal mode 1: S1 start/stop button, S2 forward/backward button, W2 potentiometer speed control. If limit reversal is required, two limit switches can be connected to the P3 pin, and the motor motion shaft is mounted with contacts, so that the motor will reciprocate within the stroke between the two limit switches.
[2] Normal mode 2: Click S1 button to start forwards, S2 backwards, click any button again to stop. W2 potentiometer speed regulation. If the limit stop is required, two limit switches can be connected to the P3 pin, so that the motor will stop moving when it touches the limit switch, and the motor will reverse after the opposite button is clicked.
[3] Jog mode: S1 presses the forward rotation, releases the stop, S2 presses the reverse rotation, releases the stop, and the W2 potentiometer adjusts the speed. If a limit stop is required, the upper limit switch can be connected to P3.
[4] Automatic round-trip mode: S1 starts and stops, S2 is reversed, W2 potentiometer speeds, and W1 potentiometer adjusts the automatic round-trip steps. After starting, the motor automatically runs back and forth within the number of steps adjusted by W1.

Description:
Pluggable terminal waterproof DS18B20 temperature sensor can be used in many places, such as soil temperature detection, hot water tank temperature control, waterproof DS18B20 temperature sensor must also be connected to a pull-up resistor can be used, for which we designed the converter to send use.
Specifications:
Temperature sensor supply voltage: 3.0V ~ 5.5V
Temperature sensor resolution: 9 to 12 adjustable resolution
Temperature range: -55 ~ 125 ° (lead can only withstand the highest temperature of 85 degrees)
Temperature Sensor Output Lead: Yellow (DATA) Red (VCC) and Black (GND)
Adapter Cables: DATA, VCC, BLK,
Suitable platform: for Arduino and Raspberry Pi

MAX7219  is an integrated serial input/output common cathode display driver,it is connected to a microprocessor and an 8-digit 7-segment LED display.it can also be connected to a bar graph display or 64 independent LEDs.It includes an on-chip B-type BCD encoder, multi-channel scanning loop, segment word driver, and an 8*8 static RAM for storing each data.Only one external register is used to set the segment current of each LED.
A convenient four-wire serial interface can be connected to all general-purpose microprocessors.Each data can be addressed without updating all displays when updating.MAX7219 also allows users to choose to encode or not to encode each data.
The entire device contains a 150μA low-power shutdown mode, analog and digital brightness control,a scan limit register allows the user to display 1-8 bits of data, and a detection mode that allows all LEDs to emit light.
Only 3 IO ports are needed to drive 1 dot matrix!No flashing when dot matrix display! Support cascading!
Module parameters：
1.A single module can drive an 8*8 common negative dot matrix
2.Module working voltage: 5V
3.Module size:length 12.8 cm X width 3.2 cm X height 1.3 cm
4.With 64 fixing screw holes, hole diameter 3mm
5.Module with input and output interface, support multiple modules cascade
Wiring instructions:
1.The left side of the module is the input port, and the right side is the output port.
2.When controlling a single module, only need to connect the input port to the CPU.
3.When multiple modules are cascaded, the input of the first module is connected to the CPU, the output is connected to the input of the second module, the output of the second module is connected to the input of the third module, and so on...
Take 51 microcontroller as an example:
VCC  →  5V
GND  →  GND
DIN  →  P2.2
CS   →  P2.1
CLK  →  P2.0
Shipping list：
1.MAX7219 dot matrix module four in one (finished product, with dot matrix, has been tested)
2.20CM Dupont line 5P

NE5532 adjustment  Amplifier Board Preamplifier AC 12V-15V Power 4 Way Adjustment
Description:
The general transformer has dual 12V front power supply and dual 24V post power supply at least 2 groups of output. The double 12V for tone board. The main winding with double 24V or more after the stage.
①With Texas NE5532 operational amplifier.
②For the amplifier board preamplifier to amplify the pre-level volume and can do high and low bass adjustment, to optimize the sound quality.
③ Sealed dustproof potentiometer.
④Wide voltage supply.
Specifications:
Supply voltage: dual AC 12V±2V
Power consumption: 5W
Dimensions: 100*60mm (not including knob protruding part)
Mounting hole distance: K=M3    J=53X93
Pre-chip: NE5532
Input interface: standard lotus socket
Output interface: 2.54-3P
Number of channels: two channels
Adjustment type: 4 channels (treble middle bass total volume)
Package Included:
1 pcboard

XH-M604 18650 Lithium Battery Charging Control Board DC 6-60V Li-ion Lead Acid Battery Charge Protection 12V Digital Voltmeter
Description
Input Voltage:DC 6-60V
Display Accuracy:0.1V
Control Accuracy:0.1V
Output Type:direct output
Voltage Tolerance:±0.1V
Apply For:6-60V MAX 80V battery
Dimension:81*54*18mm
Use: In the setting voltage value, start button play button raised, about stop button role to down key
1. Set the start voltage:
Normal display voltage state, press to a starting voltage button ,to display the start charging voltage. long Press the start button, digital flashes, by start and stop button, set the start charging voltage value.
2. Set Stop voltage:
Normal Voltage normal display mode, press to a Stop voltage button ,to display the Stop charging voltage. long Press the Stop button, digital flashes, by start and stop button, set the Stop charging voltage value.
3. Setting Error:
Energized state while holding down the start / stop button, digital display 888, which is the factory setting.
Package Included:
1 x  Digital display Lead acid Battery Charge Control Module

Description:
The SSM2167 is a low-voltage, low-noise mono microphone preamplifier, ideal for low-power audio signal chains. This preamplifier includes a built-in compression and noise gate. For this function, it is better than using an op amp in the preamplifier circuit. The dynamic range of the compressed microphone signal reduces the peak signal level and adds additional gain to the low level signal. The noise gate attenuates the signal level below a certain threshold,in order to amplify only the desired signal, such as speech, and reduce the noise in the output signal. These features will help improve the clarity of the voice signal received by the microphone.
Working Voltage:DC 3V-5V
Size:2.2x1.5cm/0.87x0.59inch
Package included:
1x SSM2167 Microphone Preamplifier Board

CJMCU - 226 - support alarm function of the 36 v, bidirectional, high precision, low side and high side power monitor, I2C output current
The highest INA226 disturbance voltage of 10 microvolts (uV), the largest gain error is 0.1% , precision is 10 times higher than the industry leading competitive products. This device is a complete 16-bit single chip solutions, to number the I2C interface of current, voltage and power to provide comprehensive programmable measurement. INA226 for servers, computers, telecommunications equipment, power management equipment and test equipment design staff with great advantages, can fully meet the requirements for the precise power measurement.
The main features and advantages
, with the I2C interface of single chip solutions to support current, voltage and power measurement, to simplify the need for external multiplexer or ADC circuit board design, to layout the limitations;
Industry the highest accuracy, with a modest 0.1% uV maximum offset voltage and maximum gain error, not only can implement higher precision in low power flow, but also can use smaller shunt resistor, which can reduce the loss of the I * R;
independent programmable conversion time and sample average technique not only can simplify the speed requirement of each system customization, but also can reduce the demand for software and storage;
, uA 420 largest static current and uA the mark 2 break current support efficient work, even if INA226 integrated ADC and power multiplexer, power consumption and the discrete solution of 3.5% lower than the similar competitive products;
140 dB, common mode rejection ratio (CMRR) and 36 V common-mode voltage (CMV) within the scope of work to ensure minimal or no changes of offset voltage, which can simplify the error analysis.

This cheap and small Wifi transciever is the perfect solution for home Automation and IoT applications. It can be the replacement for your NRF24L01, it can talk to your Wifi router directly through the UART MCU's (Rx, Tx).
The ESP-12 module is one of the most complete of the ESP family as it allows you to use biggest amount of pins. You can program this module to work stand alone with the For Arduino IDE or NodeMCU.
It has an LDR and a WS2812 LED already on board for your projects. The board comes with a CH40 micro USB module to program it.
The ESP8266 is a highly integrated chip, including antenna and power management converter. The system is equipped with ESP8266 and it's features are: energy saving VoIP quickly switch between the sleep / wake patterns, with low-power operation adaptive radio bias, front-end signal processing functions.
This version, the ESP8266-03 is one of the smallest versions of this module. It includes a buil-in ceramic antenna.
Specifications:
LDR Lignt Sensor on board
WS2812 Led on board
3x tactile buttons (1x in the Witty board and 2x in theCH340 board)
Supports 3 modes: AP,STA,AP STA
Dimensions: 24mm x 16mm
Micro USB connection for power and/or programming
Package Included:
1x CH340 Micro-USB interface motherboard.
1x ESP-12F WIFI Wireless Transceiver Module Breakout Pre-soldered

UNO R3 ESP8266 Web Sever serial WiFi expansion board shiled ESP-12E for arduino
 
1. Standard pin interface to achieve full compatibility with the pitch Arduino Uno, Mega and so on. (Unless the standard size arduino, such as Nano, Mini)
2. 3.3V power supply using advanced chip (with the official expansion board power chip CC3000 same), so 3.3V Arduino board provided more accurate, so ESP8266 as official cc3000 chip work as normal, there is no gap.
3. It leads to a WiFi module power supply / service interface to facilitate developers to extend the power supply and maintenance.
4. Onboard ESP8266-12 stable industrial grade serial WiFi module, using an enhanced PCB antenna, signal better.
5. You can quickly switch DIP switch ESP8266-12 industrial grade WiFi stable operation mode (such as operating mode and upgrade mode) module, integrated serial chip, quickly flashing the firmware.
6. Built-in 5V to 3.3V TTL level converter to prevent high-pressure Arduino TTL level of the WiFi module damage.
7. Onboard ESP8266-12 stable industrial grade WiFi module with a metal shield, immunity to interference.
8. Onboard ESP8266-12 standard pitch leads to a stable industrial grade WiFi module all interfaces, enabling developers to easily develop deep.
9. Use stackable design, it can continue to accumulate above the other modules, easy to use.
10. Onboard four LED displays the status of ESP8266, namely PWR, DFU, AP, STA
 
Package Included:
1PCS*ESP-12E ESP8266 UART WIFI Wireless Shield TTL Converter for Arduino UNO R3 Mega
 

Product Name: GP2Y1010AU0F dust sensor module
Technical parameters:
Power supply voltage: DC5 2V
Operating Current: 20mA (peak)
Sensitivity: 0.5V / (0.1mg / m3)
The minimum detection level of particles: 0.8 m
Clean air voltage: 0.9V typ.
Working temperature: -10 ~ 65
Storage temperature: -20 ~ 80
Size: 46mm × 30mm × 17.6mm
Size Weight: 15g
Uses: mainly used for dust removal equipment alarm equipment, air purification equipment, dust robots, fire alarm, etc. industry equipment can detect smoke particles, pollen spores and other particles;
ShP GP2Y1010AU0F Dust Sensor *1
Cable *1
150ohm resistor *1
16v220uF capacitor *1

Wifi Bluetooth Development Board Antenna ESP32 ESP-32 REV1 CH340 CH340G MicroPython Micro USB Lithium Battery Interface
Feature
wireless online
Bluetooth
4MB flash
Lithium battery interface, 500mA maximum charging current