Features:
Small and lightweight, convenient for use.
Designed specifically for power generation. 
Sealed for moisture protection and contain thermal elements formulated for optimum Seebeck power generation. 
High temperature 150℃, with NM static protection.

Features:
High quality.
Control the speed of a DC motor with this controller.
High efficiency, high torque, low heat generating.
With reverse polarity protection, high current protection.

This adjustable regulator module with AC or DC voltage input, the output voltage is 1.25V-28V DC continuously adjustable, versatile for DC board. 

Features:
Adjustable regulator module with LED display.
2A or less can be loaded,  AC or DC voltage input.
The output voltage is 1.25V-28V DC continuously adjustable, versatile for DC board. 
Using double adjustment potentiometer to ensure good contact, effectively protect the load. 

Notice:
The minimum differential between input and output is 3V; the input must be higher than the output voltage above 3V to be regulated.
Buck, not boost, when input 5V output 1.25-2V, not 6V.

The amplifier board adopts high quality TPA3116 digital amplifier chip as the core. Output power: 50W+50W+100W subwoofer, making it features high efficiency and high power.

Features:
Adopts high quality TPA3116 digital amplifier chip.
Sound quality is very good, high efficiency and amplifying power.
50W*2+100W 2.1 channels(left/right channel and subwoofer channel), high efficiency and low-heat.
Powered by DC 12-26V, wide input voltage.
User can adjust the volume by themselves easily.
Applicable speaker impedance: 4-8 ohm.
Just connect the power supply and loudspeaker box, enjoy the pure digital music!

This constant voltage and constant current programmable control power supply module makes analog integration and digital control functions combined in one. This module has power-down stored function that it can store 10 groups of preset values and extract 2 groups of stored values. With LCD display, user can view the preset voltage/current, output voltage/current, output power, input voltage, etc. This product, with small size, advanced functions, good visual effect, high operability, and high precision, can not only be used independently, but also inset into the device for wide application range.

Features:
Fast operation for voltage and current settings.
Make analog integration and digital control functions combined in one.
Adjustable output voltage range from 0V-32V/50.00V(optional), adjustable output current range from 0-3.000A/5.000A(optional).
Set default boot open or close the output.
The module can storage 10 groups of preset values and it can quickly extract 2 groups of preset values.
LCD display and voltage/current meter function, you can view the preset voltage/current, input voltage, output voltage/current, output power, etc.
In the output state display area, it is convenient for you to know whether the output works, constant voltage/current output state, current data group extracted, etc.
With advanced functions, high accuracy, wide application, the item is really practical for use.

Note:
It is better to make the input voltage lower than the Max. value, otherwise the item maybe be damaged.

This is a relay module with high performance, which is convenient and practical for users.

Features:
The module voltage: 5V, 12V, 24V are available.
Output capacity: within DC 30V 30A or AC 250V 30A.
Using optocoupler isolation, strong anti-jamming capability and stable performance.
The module can be set high or low trigger.
With power indicator and working indicator.
To ensure stability, uses industrial grade PCB board and 9.5mm barrier terminals.
All interfaces can be connected directly via terminal wiring leads, very convenient.

Module Interface Description:
1. DC +: DC power supply positive;
2. DC -: DC power supply module negative;
3. IN: Signal input terminal(support High/Low Level switch freely);
4. Normally open (NO): Relay normally open;
5. Common terminal (COM): Relay common;
6. Normally closed terminal (NC): relay normally closed terminal;

This is a relay module with high performance, which is convenient and practical for users.

Features:
4-channel, DC 12V 30A relay module.
Output capacity: within DC 30V 30A or AC 250V 30A.
Using optocoupler isolation, strong anti-jamming capability and stable performance.
The module can be set high or low trigger.
To ensure stability, uses industrial grade PCB board and 9.5mm barrier terminals.
All interfaces can be connected directly via terminal wiring leads, very convenient.

Module Interface Description:
1. DC +: DC power supply positive;
2. DC -: DC power supply module negative;
3. IN: Signal input terminal(support High/Low Level switch freely);
4. Normally open (NO): Relay normally open;
5. Common terminal (COM): Relay common;
6. Normally closed terminal (NC): relay normally closed terminal;

It's a PWM speed controller which enables you to control the speed of those DC brush motors smoothly. It's ideal for applications like car motors, DC heater, bulb etc. providing nice adjustment of motor speed.

Features:
Wide voltage range, 10-50V, 40A, max. 2000W for motor speed control & HOO.
Apply PWM Modulation system to adjust motor speed from 5-100% .
Stable in working, high efficiency and low noise.
Field-effect tube, drive IC, 70μm copper sheet PCB for higher efficiency of PWM wave output.
Potentiometer for speed adjustment, protective case creates better durability.

Specific Power Control:
12V: 480W; 24V: 960W; 36V: 1440W；40V: 1600W; 50V: 2000W

PWM Working Principle:
BY changing the duty ratio of square wave(output) to adjust average current power from 0-100% on load, thus to change the motor speed or light brightness.

Main Applications:
1.Universal DC brush motor speed control.
2.Control motor speed of cars(eg. car cooling fan motor, car fan motor, car windshield wiper motor, air condition fan motor)
3.Adjust speed of the conveyor of product lines, tube exhaust fan, treadmill, electric fan.
4.Adjust temperature of DC heater, brightness of common DC bulb. 

This heating module uses a large PCB layout design which ensures a good heat dissipation and high power. There is a built-in cooling fan. It can work for DIY players and meet need for small parts quenching, annealing and other heat treatment. It can also be used with a graphite crucible to smelt gold, silver, copper, aluminum and other metals. Rapid and uniform heating is very convenient. The induction heating power supply is recommended to use more than 24V 10A switching power supply. The greater the voltage, the greater the current, the greater the heating power, the faster the heating rate.

Features:
Heating plate with large PCB design, component layout is sparse for heat dissipation.
Power line design can increase the current heat radiation and makes the board smaller and more stable.
Anti-static large heat sink ensures a good heat dissipation effect.
The positioning holes are exactly matched with the board, and the power supply is directly inserted on the board. 

Welcome to use this high quality BT Audio Receiver Board. It is equipped with USB interface and TF card slot, talk via BT function.

Features:
TPA3116 power amplifier chip, 2*50W stereo power output.
BT 4.0, a perfect BT audio receiver board for use.
USB interface/TF card slot, supported playing formats: MP3, WMA, WAV, FLAC. 
Talk via BT function with microphone.
DC 8-26V input voltage for power supply.
The wireless receive distance can be up to 15m(shielded signals).
Equipped with heat-dissipating module on the board.
With 5 buttons on the board for adjustment, convenient and easy operation.
Remote control for receiving and controlling(infrared way).

This product is designed to control the relay and then control to pump water or drain away water according to water level. It has so many advantages, such as mini size, easy wire connection, low power consumption, strong anti-interference performance, etc.    

Features:
Designed to control the relay and then control to pump water or drain away water.
Mini size, easy wire connection.
Powered by 9V-12V AC/DC.
Low power consumption, strong anti-interference performance.
Great for pool or water tower to control the water level.

Notice:
The product is not equipped with probe, don't need to buy probe neither. Just strip the electric wire 2cm to instead of probe, make it become bare wire then can induce directly.   

With this DIY clock kit, you can make a multi-functional alarm clock by yourself. It can display time, date, week and temperature in the 1602 LCD screen. With acrylic case, components can be well protected and the clock looks stylish.

Features:
1602 LCD display the time, date, week and temperature.
12H/24H time format; °C/°F temperature unit.
3-channel alarm clock: turn on/off independently.
1 schedule alarm.
3 modes for date display and 2 modes for week display.
Set the time range for hourly chime function.
Adjustable brightness: 3 levels for auto brightness and 6 levels for fixed brightness.
USB DC5V for power supply, convenient and quick for use.
With acrylic housing, components can be well protected.
Great DIY clock kit for electronic enthusiasts, easy to install.

With the wide applications of semiconductor cooling, more and more DIY enthusiasts are interested in it. It's a question that how to solve heat dissipation in cooling applications. This product could be just to your taste to solve this problem.
 
Features:
High quality for use, Max. power is 120W.
Include a large radiator, 2pcs cooling fans, 2pcs large fans and 2pcs cold conduction modules.
Installation has been finished already, easy and convenient for use.
Great product for electronic enthusiasts in DIY semiconductor cooling system.

Note:
1. Semiconductor coolers are a form of solid state cooling that incorporates both semiconductor technologies and electronic assembly techniques.
2. The conduction cool module can frost when the temperature is under -25°C.
3. The DC power is not included, please prepare it by yourself.

This item adopts NE5532 Front chip for for better noise performance and good output drive capability. It's suitable for high-quality and professional sound equipment, control circuit and telephone channel amplifier.

Features:
Adopts NE5532 front chip for for better performance.
High quality potentiometer contacts well, stable for audio output.
Adjustment Types: 4 channels(treble+alto+bass+volume)
12-24V AC dual power supply, wide input voltage.
For the input part, uses dual RCA plug, audio contacts well and long life span.
Suitable for high-quality and professional sound equipment, telephone channel amplifier.

This headphone amplifier DIY kit adopts NE5532 operational amplifier, which can ensure good sound quality.

Features:
Adopt NE5532 operational amplifier.
Play with good sound quality.
Wide range for input voltage: DC9V-18V.
Standard 3.5mm audio input/output interface.
With rotating knob for volume adjustment.
Components can be well protected by the transparent housing.

Features:
Input voltage is DC5V~27V, rated output current is 5A.
With 4pcs MOS transistors working indicators.
Signal type: use sinking current driving for signal control.
Support most of singlechip to drive directly.
Support PWM signal frequency within 20KHz.
Optocoupler isolation.

Sound quality is very good and it can drive 4/6/8 ohm speakers. BT V4.0, it has sufficient power output 2*50W. 

Features:
Sound quality is very good by using this module.
Using CSR8635 BT chip, BT V4.0, high software compatibility.
Power amplifier chip: TDA7492 double channels sufficient power 50W, better than TDA7492P.
DIP switch for more convenience to adjust amplification gain.
With 5 buttons for adjustment, easy to operate.
Applicable speaker impedance: 4/6/8 ohm (8 ohm is the best).

The Digital Control Buck-Boost Supply Power Module makes analog integration and digital control functions combined in one. Its adjustable output voltage range is 0-50.00V, step by 0.01V; its adjustable output current range is 0-20.00A, step by 0.01A. This module has power-down stored function that it can store 10 groups of preset values and extract 2 groups of stored values. Compared with the traditional analog power supply, it is more convenient to quickly extract the voltage or current required. With LCD display, user can view the preset voltage, input voltage, output voltage, the preset current, output current, output power, etc. This module has many advantages, small size, advanced function, good visual effect, high operability, high-precision, being used independently, being inset into the device and been widely applied.

Features:
Fast and convenient operation for voltage and current settings.
Make analog integration and digital control functions combined in one.
Adjustable output voltage is 0-50.00V; adjustable output current is 0-20.00A.
The module can store 10 groups of preset values and can quickly extract 2 groups of stored values.
LCD display and voltmeter/ammeter function, you can view the preset voltage/current, input voltage, output voltage/current, output power, etc.
On the output state display area, you can see output opens or not, constant voltage/current output state, current data group extracted, etc.
User can adjust over-voltage/over-current/over-power values, data set and LCD brightness.
Advantages: advanced function, good visual effect, high operability, high precision, used independently, inset into the device.

The amplifier board adopts high quality TPA3118 digital amplifier chip as the core. Output power: 30W+30W+60W subwoofer, making it features high efficiency and high power.

Features:
Adopts high quality TPA3118 digital amplifier chip.
Sound quality is very good, high efficiency and low-heat.
2*30W+60W 2.1 channels(left/right channel and subwoofer channel).
Powered by DC 12-26V, wide input voltage.
User can adjust the volume by themselves easily.
Applicable speaker impedance: 4-8 ohm.
Just connect the power supply and loudspeaker box, enjoy the pure digital music!

Features:
Low voltage for power supply, the lowest is 3V, convenient for use.
Can be powered by 3.7V lithium battery, 5V power bank, switch power, transformer, etc.
Adjustable delay time range: 0.1s to 999 minutes.
The use of opto isolated input and output, enhanced anti-jamming capability and consumption.
The setting parameters can be memorized after power off.
To ensure stability, industrial grade PCB board.
Applied to control motor, bulb, LED light string, mini pump, etc. 

Notice:
Relay output is passive contact without charge output, and it control the on and off of the line.

Working modes selection: after power on, long press K1 for 2s, later into the selection of modes: P1~4; K2 to enter the mode.
P-1: A signal to trigger relay, time is up, the relay disconnect;
P-2: A signal trigger and countdown begins, T1 seconds after, the relay closes T2 seconds, then opens;
P-3: Connect T1 seconds, disconnect T2 seconds, infinite loop. Users can set the relay time T1 and T2;
P-4: The relay closes when a signal triggers, when the trigger signal disappears, digital countdown begins, and the relay opens when the time is up.

This module can detect DC current in the range of 0-10A, the accuracy is 0.01A.

Features:
Detecting range: DC 0~10A; accuracy: 0.01A(10mA).
Detect the current to control the relay then control the circuit on/off.
Set delay time to prevent output shock so as to protect the circuit.
With error calibration function.
Can turn off the LED display to reduce power consumption.

Functions Description:
P-1: Over-current Detection: when the detecting current<I1(low limit setting), the relay closes; >I2(high limit setting), the relay opens.
P-2: Under-current Detection: when the detecting current>I2, the relay closes; <I1, the relay opens.
P-3: Close in the Range: when the detecting current is between I1 and I2, the relay closes; relay opens in other situation.
P-4: Open in the Range: when the detecting current is between I1 and I2, the relay opens; relay closes in other situation.
P-5: Error Calibration and Delay Time Setting: the relay would not operate.

Buttons Description:
K1: Modes Selection;
K2: "+"
K3: "-"
Long press K1 for 2s into modes selection; short press K1 to select function and K2 to enter the mode.

Note:
After power on, the LED digits would pulse if the detecting current terminal is none.

Welcome to use this high quality BT Audio Receiver Starter Ver2.1. This audio receiver board has a built-in 3.5mm audio jack for audio output. The distance from this unit and the BT transmitter could be up to 10m(shielded signals).

Features:
A perfect BT audio receiver board for use.
Built-in 3.5mm audio jack for audio output.
BT 2.1 receive, can connect with the earphone and can also be used for power amplifier.
USB interface, powered by DC 5V; with TF card slot.
With 5 buttons for adjustment, convenient and easy operation.
The transmission distance could be up to 10m(shielded signals).

This is a delay timer module with high performance, which is convenient and practical for users.

Features:
New upgrades to simplify, meeting the users' needs.
Increase the power supply anti-reverse function.
LED digits display, intelligent control, time relay/delay function.
The use of opto isolated input and output, enhanced anti-jamming capability and consumption.
The last setting parameters can be memorized after power off.
Power saving function, one-key switch, can turn off the display.
To ensure stability, industrial grade PCB board. 

Working modes selection: after power on, long press K1 for 2s, later into the selection of modes: P1~3.
P-1: Monostable trigger delay, a signal to trigger relay, time is up, the relay disconnect;
P-2: A signal trigger and countdown begins, T1 seconds after, the relay open T2 seconds, then close;
P-3: Open T1 seconds, disconnect T2 seconds, infinite loop. Users can set the relay time T1 and T2;

This controller can be set 99 groups of time(steps), the relay switch in each step can be set in cycle or release state. It can use external input signal to achieve many functions. It can be used to achieve four solenoid valves linkage and sequence control similar to PLC, etc.

Features:
Industrial LCD display, 4 keys for easy operation, with reset function.
High performance microcontroller for high stability, high reliability and low power consumption.
Reverse power protection function, avoiding surge current shock.
Four-channel time relay, each channel has common, normally open and normally closed contacts, 4 sets of conversion.
99 groups of time(steps) for setting, adjustable timing range: 0.1 second to 9999 minutes(countdown).
4 channels in each step can be set in cycle or release state; the total number of Loops is adjustable from 0 to 9999(zero for the infinite loop).
Each step can be set in forward cycle to run for 0-999 times, supporting 20 layers of nesting loops.
Allowing external input of high level and low level signals to achieve trigger function and waiting input to run, jumping to another step ,stopping running functions.
User can set password to prevent others to change the setting parameters.
All setting parameters can be saved after power off.

This multi-functional sensor meter can measure Current or Voltage signal input in the range of 0-75mV/4-20mA/0-10V. It can be used with 2-wire transformer, pressure sensor, 4-wire weighing sensor, remote pressure meter resistance transmitters, potentiometers, transducers and other sensor measuring devices. 

Features:
High precision, stable performance and easy operation.
4-digit LED display for clear measurement readings.
Input signal: 4-20mA, 0-10V, 0-75mV.
The sampling rate for measurement input is 10 measurements per second.
It can be used with transmitter, pressure sensor, liquid level sensor, weighing sensor and so on.

With the wide applications of semiconductor cooling, more and more DIY enthusiasts are interested in it. It's a question that how to make refrigerating capacity to a more great extent in water cooling applications. This DIY kit could be just to your taste. 

Features:
Adopt 2pcs TEC1-12706 semiconductor chilling plate, good quality for use.
Complete sealed structure, isolating the moisture in the air.
Higher reliability than others.
Include 2*TEC1-12706, 2*conduction module, 1*water block, 2*fans, 2*thermal grease, 1*base board and a pack of screws.
Lightweight and mini in size, easy to install.
Great DIY kit for electronic enthusiasts in semiconductor cooling applications.

Note:
1. The conduction cool module can frost when the temperature is under -25°C.
2. TEC1-12706: one side with words is the refrigeration side, the other side is heat dissipation side.
3. Must install heat sink or water-cooled radiator on the heat dissipation side; otherwise will burn the Peltier.
4. The DC power is not included in this kit, please prepare it by yourself.