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FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Summarize: LC 12V WiFi relay module carried a ESP8266 WiFi module and microcontroller. It will send the serial port instructions to the cell phone APP and Implementation within the local area network (LAN) for wireless control relay. The function and characteristics: Onboard ESP8266 WIFI module, AP mode 5 client can be connected at the same time; Module has two work modes: 1, cell phones, carry on the WiFi module;2, mobile phone and WiFI module Carrying on the same router, by mobile phone APP to control relay; Transmission distance: 1, the open environment, the mobile phone when carrying on the WIFI module maximum transmission distance of 400 m; 2, when the WiFI module and cell phone carrying on the router at the same time the signal transmission distance in accordance with the router on the weak; Onboard 12 v, 10 A / 250 v AC 10 A / 30 v DC relay, absorb 100000 times continuously; Module with diode effusion protection, short response time; Module baud rate: 9600,8,1,0,0. Introduced the hardware and instructions: Size: 45*28mm The board function description: IN +,IN-: 12 v power input; TX,RX and GND: a serial port debug pins; Introduction: Onboard the ESP8266 WIFI module has three work modes: STA (client), AP (hot), the STA + Ap(hot +client), according to the workings of a module to the corresponding choice of WIFI module working mode.Module need before use serial debugging software and USB to TTL module send serial command was carried out on the WIFI module configuration (don't power outages after configuration is complete, as some of the parameters of WIFI module cannot be saved when the power is cut off), mobile phone and WIFI module after establishing a network connection can use the phone APP control relay. App download from here ! Package included: 3 x ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch 3Pcs ESP8266 12V WiFi Relay Networking Smart Home Phone APP Remote Control Switch

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Summarize: LC 5V WiFi relay module carried a ESP8266 WiFi module and microcontroller. It will send the serial port instructions to the cell phone APP and Implementation within the local area network (LAN) for wireless control relay. Function and characteristics: Onboard ESP8266 WIFI module, AP mode 5 client can be connected at the same time; Module has two work modes: 1, cell phones, carry on the WiFi module;2, mobile phone and WiFI module Carrying on the same router, by mobile phone APP to control relay Transmission distance: 1.The open environment, the mobile phone when carrying on the WIFI module maximum transmission distance of 400 m 2.When the WiFI module and cell phone carrying on the router at the same time the signal transmission distance in accordance with the router On the weak Onboard 5 v, 10 A / 250 v AC 10 A / 30 v DC relay, absorb 100000 times continuously Module with diode effusion protection, short response time Module baud rate: 9600,8,1,0,0. The board function description:   Size: 45*28mm IN +,IN-: 5 v power input TX,RX and GND: a serial port debug pins Introduction: Onboard the ESP8266 WIFI module has three work modes: STA (client), AP (hot), the STA + Ap(hot +client), according to the workings of a module to the corresponding choice of WIFI module working mode.Module need before use serial debugging software and USB to TTL module send serial command was carried out on the WIFI module configuration (don't power outages after configuration is complete, as some of the parameters of WIFI module cannot be saved when the power is cut off), mobile phone and WIFI module after establishing a network connection can use the phone APP control relay. When cell phone equipped with WiFi module sends commands in the following order: (The default baud rate 115200) 1, AT+CWMODE=2, namely AP mode is selected; 2, AT+RST, reset; 3, AT+CIPMUX=1, open multiple connections; 4, AT+CIPSERVER=1,8080, configure the TCP server, set the port; 5, AT+CIOBAUD=9600 set the baud rate to 9600. (working in relays to control the baud rate 9600) 6, AT+CIFSR to view the AP mode IP address, such as: the APIP, "192.168.4.1"; 7, Cell phone WIFI signal connection name starts with AI-THINKER or ESP8266; 8, In the "TCP connection" address and port into the APP, such as 192.168.4.1 and 8080; 9, Click on the grey box relays can be controlled. 10,  Document: Applications:   1. Home Automation 2. Industrial IOT Applications 3. Lighting Controls Package included: 3 x ESP8266 5V WiFi Relay Module

Description: Rated power: 10W Support QC2.0(5V/9V/12V/20V), compatible QC3.0(3.8~12V,+/-2 Step), Android BC1.2(5V), Apple 5V voltage range and MTK-PE 5V/7V/9V/12V, etc. It's easy to test the output current of power bank, cellphone charger and USB power if up to standard. And it can do the aging test on power bank and USB power adapter. When it's discharge on the aging test, resistance will be hot, the temperature is about 80 - 85 ?? please note that the anti-hot. Not included the USB tester. Package included: 3 x 4 switch USB aging discharge loader

Description: This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8Ω speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps! CJMCU The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin to ground. The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly. CJMCU Comes with a fully assembled and tested breakout board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Features: - Output Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply - 50dB PSRR at 1KHz - Filterless design, with ferrite bead + capacitors on output. - Fixed 24dB gain, onboard trim potentiometer for adjusting input volume. - Thermal and short-circuit/over-current protection - Low current draw: 4mA quiescent and 1uA in shutdown mode Note: Speaker is not included, use any 4 ohm or greater impedance speaker. Package included: 3 x Audio Power Amplifier

Features: Excellent for cooling heatsinks on hot ends, prints, or other cooling needs Made of high quality PBT+30% glass line +VO Bearing is high precision, long life and low noise Specifications: Temperature of usage environment: -20￢ﾄﾃ to 75￢ﾄﾃ Working environment temperature: 40￢ﾄﾃ Service life: Can be continuous working 24 hours Speed: 4200±10%RPM (r/min) Voltage: DC 24V Rated current: 0.1A Size: 50 x 50 x 15mm Inlet size: 31mm Outlet size: 20*15mm Noise: 25DBA Structure: Sleeve bearing Package included: 3x Cooling Fan

Features: - Sensitive material MQ-9 gas sensor is used to clean the air in the lower conductivity of tin dioxide (SnO2). - Detection method using low temperature cycling (1.5V heating) to detect carbon monoxide, conductivity sensors with carbon monoxide in the air increased with increasing gas concentration, spurious adsorption at high temperatures (5.0V heating) detection of combustible gases methane, propane and cryogenic cleaning gases. - Simple circuit can be used to change the conductivity, concentration of the gas is converted to the corresponding output signal. - MQ-9 high gas sensor for carbon monoxide, methane, liquefied petroleum gas sensitivity, the sensor can detect a variety of gases containing carbon monoxide and flammable, is a low-cost sensors for a variety of applications. Speciffications: 1. It adopts high quality double panel design with power indication and TTL signal output indication; 2. It has DO switch signal (TTL) output and AO analog signal output; 3. The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module) 4. The voltage of the analog output, the higher the concentration, the higher the voltage. 5. It has good sensitivity to gas and natural gas detection. 6, there are four screw holes for easy positioning; 7, product dimensions: 32 (L) * 20 (W) * 22 (H) 8, has a long life and reliable stability 9, fast response recovery characteristics Electrical Performance: Dection of gas: Carbon monoxide flammable gas Dection of Concentration:10-1000ppm(CO);100-10000(Gas) ppm Input voltage: DC5V Power consumption (current): 150mA DO output: TTL digital quantities 0 and 1 (0.1 and 5V) AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V Using the chip: AT89S52 Crystal: 11.0592MHZ Baud rate: 9600 Compilation environment: Keil Special Reminder: After the sensor is energized, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside, if it is hot, it is not normal. Package Included: 3 x MQ-9 Gas Sensor Module