New Items

This USB to UART/ESP8266 Adapter Programmer for ESP-01 WiFi Modules with CH340G Chip converts the signal from a USB interface to a PC / laptop to match a serial module ESP8266.

This converter module has CH340 chip which is reliable and with high performance. It is compatible with most Windows systems. The adapter features integrated capacitors to maintain a current of 1000 F.

USB to ESP-01 adapter module has CH340G USB to TTL driver IC onboard, so you can easily use your computer to do ESP-01 functional debugging. ESP-01 serial wifi module can be directly plugged into the yellow pin header without any connecting wire.

USB to UART/ESP8266 Programmer used for an ESP-01 module with the ESP8266 chip. It has CH340G USB to TTL driver IC onboard, so you can easily use your computer to do with ESP-01.

Note: The package does not include any ESP8266 Wifi Module, you need to buy it separately.

1. Using CH340 turns serial port chip for stable performance and compatibility.
2. Supports all basic windows versions.
3. The adapter plate integrated 1000F solid capacitors to ensure the current supply
4. The power supply will not be a problem to make WIFI module crashes unresponsive.
5. Using 3225 SMD crystal oscillator, improve the stability of serial work, on a beautiful and tall.
6. The interposer board is specifically designed for ESP8266 The USB Turn serial port.

1 x CH340 USB to ESP8266 WIFI Module Adapter Board.

The SIM800A Quad-Band GSM/GPRS Module with RS232 Interface is a complete Quad-band GSM/GPRS solution in an LGA(Land grid array) type which can be embedded in the customer applications. SIM800A support Quad-band 850/900/1800/1900 MHz, it can transmit Voice, SMS and data information with low power consumption.

With a tiny size, it can fit into slim and compact demands of custom design. Featuring and Embedded AT, it allows total cost savings and fast time-to-market for customer applications.

The SIM800A modem has a SIM800A GSM chip and RS232 interface while enables easy connection with the computer or laptop using the USB to the Serial connector or to the micro-controller using the RS232 to TTL converter. Once you connect the SIM800A modem using the USB to RS232 connector, you need to find the correct COM port from the Device Manager of the USB to Serial Adapter.

Then you can open Putty or any other terminal software and open a connection to that COM port at 9600 baud rate, which is the default baud rate of this modem. Once a serial connection is open through the computer or your micro-controller you can start sending the AT commands. When you send AT commands for example “AT\r” you should receive back a reply from the SIM800A modem saying “OK” or other response depending on the command sent.

Features and Specifications of SIM800A Module :-

• SIM800A Quad Band GSM Module
• Bands: GSM 850MHz, EGSM 900MHz, DCS 1800MHz, PCS 1900MHz
• Coding schemes: CS-1, CS-2, CS-3, CS-4 Tx power: Class 4 (2W), Class 1 (1W)
• GPRS class 2/10.
• Control via AT commands (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT command set).
• Voltage Supply Required- 9VDC to 12VDC with atleast 2A Peak Current Capability
• High-Quality Product (Not hobby grade).
• 5V interface for direct communication with MCU kit.
• TTL Rx and TTL Tx and DB9 Connector Based RS232 Outputs
• Configurable baud rate.
• Built-in SIM Card holder.
• Built-in Network Status LED.
• Inbuilt Powerful TCP/IP protocol stack for internet data transfer over GPRS.
• Low power.
• Operating temperature: -40C to +85C
• External Finger type antenna
• Weight - 40gm

Applications :- 

• Remote Data Monitor and Control.
• Water, gas and oil flow metering.
• AMR (automatic meter reading).
• Power station monitoring and control.
• Remote POS (point of sale) terminals.
• Traffic signals monitor and control.
• Fleet management.
• Power distribution network supervision.
• Central heating system supervision.
• Weather station data transmission.
• Hydro-logic data acquisition.
• Vending machine.
• Traffic info guidance.
• Parking meter and Taxi Monitor.
• Telecom equipment supervision (Mobile base station, microwave or optical relay station).
• SIMCOM A7670C-LASS LTE 4G Module Cat-1
• SIM A7670C 4G LTE Development Board
• SIM800C 32M GSM Module IC with 32M Flash
• SIM800C GSM GPRS Chip Module
• SIM28ML GPS Module – LCC 18pin
• Sim900
• Sim800a
• Sim868
• Sim808
• Sim5300e
• Sim7600e
• Sim5360e  .

It is a BO Series 110RPM DC Motor Plastic Gear Motor. The BO series straight motor gives good torque and rpm at lower operating voltages, which is the biggest advantage of these motors.

A small shaft with matching wheels gives an optimized design for your application or robot. Mounting holes on the body & lightweight makes it suitable for in-circuit placement. This motor can be used with 69mm Diameter Wheel for Plastic Gear Motors and 87mm Diameter Multipurpose Wheel for Plastic Gear Motors.

Low-cost geared DC Motor. It is an alternative to our metal gear DC motors. It comes with an operating voltage of 3-6V and is perfect for building small and medium robots.

The motor is ideal for DIY enthusiasts. This motor set is inexpensive, small, easy to install, and ideally suited for use in a mobile robot car. They are commonly used in our 2WD platforms.

We are supplying the range BO(Battery Operated) Motors with varying RPM and Gear-Box arrangement, click on the name below for more information

BO Motors

1. Cost-effectiveness of the injection-molding process.
2. Elimination of machining operations.
3. Low density: lightweight, low inertia.
4. Uniformity of parts.
5. Capability to absorb shock and vibration as a result of elastic compliance.
6. Ability to operate with minimum or no lubrication, due to inherent lubricity.
7. The relatively low coefficient of friction.
8. Corrosion-resistance; elimination of plating, or protective coatings.
9. The quietness of operation.
10. Tolerances are often less critical than for metal gears, due in part to their greater resilience.
11. Consistency with the trend to greater use of plastic housings and other components.

This is a mini solar panel. It consumes sun rays to produce electricity directly. It does not need any special equipment. Just put this device in sun ray’s and the board is ready to produce electricity. This is light in weight and also can be a place where space is an issue because it does not take much space either. This Mini device produces 6V of electricity. Because of its excellent design and high electricity production, it is very popular in solar DIY projects. So, if you want an unlimited source of electricity, then this might be the right choice for you.

This is the pack of single piece of 70mm x 70mm 6V 100mAh Square shape polycrystalline mini solar panels with wire attach

1. High electricity production
2. Does not require any special equipment
3. High quality polycrystalline solar panel
4. Durable construction
5. Resistance to moisture and environmental pollutants.

ST-Link V2 Programmer For STM8 and STM32 is fully consistent with the official version, support for automatic upgrades, support the full range STM32 SWD (only 4pins including SWCLK, SWDIO, and power) and a full range STM8 SWIM (only 4pins including SWIM, Reset and power) download and debug.

Use this device to send program code to the 32-bit STM32 ARM Cortex or 8-bit STM8 microcontrollers. The header for this ST-Link v2 programmer contains connections for 5V, 3.3V, SWCLK, SWDIO, SWIM, Reset (RST/NRST) and GND. The connector on the opposite side of this device is a USB connector and is intended to be plugged into the computer.

1. ST-LINK Utility 2.0 and above.
2. STVD 4.2.1 and above.
3. STVP 3.2.3 and above.
4. IAR EWARM V6.20 and above.
5. IAR EWSTM8 V1.30 and above.
6. KEIL RVMDK V4.21 and above.

1. PCB installed inside of aluminum alloy U disk shell, portable, safe and reliable!
2. Interface definition directly marked on the shell, clear, convenient and practical!
3. 5V, 3.3V offers at the same time, allowing you to program your target board with both 5V and 3.3V
4. Shell characters using laser engraving, never fade off! Permanent clarity!
5. 500MA internal resettable fuse, complete protection of your expensive computer motherboard!
6. Red and blue color LED indicator, allowing you to always observe ST-LINK V2 working condition!
7. With 4 DuPont line, so you can easily respond to different target board line order!
8. Use anti-static bag packaging.
9. SWIM specific features:
   • SWIM cable for connection to the application via a pin header or a 2.54 mm pitch connector
   • 1.65 V to 5.5 V application voltage supported on SWIM interface
   • SWIM low-speed and high-speed modes supported
   • SWIM programming speed rate: 9.7 Kbytes/s in low speed and 12.8 Kbytes/s in high speed
   • SWIM cable for connection to the application
10. Direct firmware update feature supported (DFU)
11. Status LED which blinks during communication with the PC
12. Operating temperature 0 to 50°C.

USB terminals are one of the most used terminals to power the electronic devices from battery  chargers like wall charger and battery banks as they are robust and have been in use for many years now and are mainly used in medical equipment, phone chargers, powering development boards and small battery powered devices like dc motors etc. It is hard to read voltage and current flowing through it if something is not working so this USB Current and Voltage Tester which works as Ammeter and Voltmeter both to determine and debug the USB connector. This dongle plugs between the USB connector and output devices. You can use this device from the 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It flips between voltage and current readouts every 3 seconds or so.

USB Current Voltage Tester Specifications

• Compact and easy to use
• Measures Voltage and Current
• Works with PC USB, home charger, car charger
• The wide range of applications
• Used in factories, laboratories, and personal use.
• Features:
  1. 1. Enabled to measure USB devices at no load and overload condition, also for USB terminals testing.
     2. Current and voltage display in turn, easy and comfortable to use.
     3. Small and portable, do not need other power supply.
     4. Measuring range: DC 3V – 9V / 0 – 3A (up to 5A )
     5. Portable Device
     6. Interface: USB2.0, USB3.0
     7. Product Weight: 0.025 kg
     8. Two output ports

The Nextion Enhanced NX3224K024 display is powerful than the standard ones. Compare to the basic Nextion displays, the enhanced ones have added some new functions, such as: supporting built-in RTC, supporting save data to Flash, supporting GPIO, larger flash capacity, and larger CPU clock. The enhanced Nextion series has 7 size covers from generic 2.4” to 7.0”.

Nextion Enhanced NX3224K024 is a powerful 2.4” HMI TFT display, with 16MB Flash data storage space, 1024 bytes EEPROM and larger RAM of 3584 bytes. With GPIO supported, now customers can use Nextion to control external devices.

Nextion Enhanced NX3224K024 – Generic 2.4” HMI Touch Display is a Seamless Human Machine Interface (HMI) solution that provides a control and visualization interface between a human and a process, machine, application or appliance. Nextion is mainly applied to the Internet of Things (IoT) or the consumer electronics field. It is the best solution to replace the traditional LCD and LED Nixie tubes.

Nextion includes a hardware part (a series of TFT boards) and a software part (the Nextion editor). The Nextion TFT board uses only one serial port to communicate. It lets users avoid the hassle of wiring. We noticed that most engineers spend much time on application development but get unsatisfactory results. As a solution to this situation, Nextion editor has mass components such as button, text, progress bar, slider, instrument panel etc. to enrich the interface design. And the drag-and-drop function ensures that users spend less time in programming, which will reduce 99% of your development workloads. With the help of this WYSIWYG editor, designing a GUI is a piece of cake. It’s easy to adapt Nextion family HMI to existing projects- users just need to provide it a UART.

1. Supports built-in RTC
2. Supports GPIO
3. SD Card interface: support max 32G Micro TF/SD card (FAT32 file format)
4. Flash data storage space: 16MB
5. EEPROM: 1024 bytes
6. RAM: 3584 bytes
7. Instruction buffer: 1024 bytes
8. Color: 65K (65536) colors
9. Resolution: 320×240 pixel
10. Adjustable Brightness: 0~180 nit – the interval of adjustment is 1%

USR-K5 is a cost-effective TTL UART to Ethernet module with tiny size that can realize the bi-directional transmission between UART and Ethernet. It is used for data transmission between TCP/UDP packets and the UART interface.

USR-K5 is integrated with TCP/IP protocol stack, users can use it easily to complete the networking function of embedded devices, save manpower, material resources, and development cycle in the development process so that the product can be put into the market faster, enhance competitiveness.

This Mini SD Card MP3 Sound Module is a reusable mass storage voice module, can plug a maximum capacity of 1GB SD card memory and can load the WAV and AD4 audio. The voice module uses WTV020SD-20SS as the core chip, with an MP3 control mode, one to one key control mode, power on loop control mode and the two-line serial control mode.

This Mini SD Card MP3 Sound Module For PIC Arduino WTV020-SD-16P has the main chip selection WTV020-16S and WTV020-20S package chips. Voice updates directly through an SD card reader on a PC replacement. Control is also an SD card stored in TXT file changes.

The module supports the FAT file system. Support and ADPCM WAV file playback. Supports two-wire serial control mode, key methods, and UART232 serial manner. Automatic speech recognition and speech sample rate format.

1. Supports the FAT file system SD carrier.
2. Supports the playing of 4Bit ADCPM format files.
3. Recognize the voice files automatically.
4. Support microprocessors and key control.
5. It could be called any paragraph voice playing.
6. Saving operation data when power off.
7. Loadable sampling rate:
   1. 6KHz to 32KHz, the 36KHz sampling rate of AD4 audio.
   2. 6KHz to the 16KHz sampling rate of WAV audio.
8. Loading voice to the SD card without the assistance of software.
9. Support combination playing of the file (including mute combination).
10. Memory contents classified by file.

• Suitable for home or factory gas leakage monitoring devices.
• Have better sensitivity to Carbon Monoxide, Methane and LPG Gas.
• High quality dual-panel design, with power indicator and TTL signal output instructions.
• DO switching signal (TTL) output and AO analog signal output.
• TTL output valid signal is low. (When the output low signal is on, it can be directly connected micro-controller or relay module.)
• Analog output voltage: the higher concentration, the higher voltage.
• Four screw holes, easy positioning.
• Long life and stability, quick response and resume.

HMI Displays are becoming increasingly popular as a result of their intelligence, and NEXTION is one of the major players in HMI Display Production, which has introduced a range of different kinds of Displays at a very affordable cost.

NEXTION offers an advanced level of displays at an affordable cost than any other competitor brand in the market, making them ideal for the one who wants to start some Projects through touch displays. This type of Display has inbuilt audio, video, and animation play functions which makes it smart.

Nextion Enhanced NX8048K050 5.0” HMI Touch Display is a seamless Human Machine Interface (HMI) solution that provides a control and visualization interface between a human and a process, machine, application, or appliance. The operating Voltage of the Display is lies between 4.75 to 7 V also with 32MB Flash data storage space, 1024 byte EEPROM, 8192 byte RAM. With GPIO supported, now customers can use Nextion to control external devices. Using the NEXTION Editor software, you can quickly develop the HMI GUI by drag-and-drop components (graphics, text, button, slider, etc.) and ASCII text-based instructions for coding how components interact at the display side. Nextion HMI display connects to peripheral MCU via TTL Serial (5V, TX, RX, GND) to provide event notifications that peripheral MCU can act on, the peripheral MCU can easily update progress, and status back to Nextion display utilizing simple ASCII text-based instructions.

1. Supports built-in RTC
2. Supports GPIO
3. SD Card interface: support max 32G Micro TF/SD card (FAT32 file format)
4. Flash data storage space: 32MB
5. EEPROM: 1024 bytes
6. RAM: 8192 bytes
7. Instruction buffer: 1024 bytes
8. Color: 65K (65536) colors
9. Resolution: 800×480 pixel
10. Adjustable Brightness:0~230 nit- the interval of adjustment is 1%
11. Certificates: CE/EMC, RoHS (certificates).

Waveshare 1.54 inch e-Ink Paper Display Module with SPI Interface comes with 200×200 resolution and embedded controller module. It is communicating via SPI interface and it supports partial refresh. As these displays have no backlight panels and it doesn’t need a continuous power supply to display the (static data with periodic intervals) data on the screen, it has a great advantage of ultra-low power consumption. Also, it has a wide viewing angle, great viewing effect under sunlight, it is an ideal choice for applications such as shelf label, industrial instrument, and so on.

1. No backlight so keeps displaying last content for a long time even when the power is down
2. Ultra low power consumption, basically power is only required for refreshing
3. SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc.
4. Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)
5. Wide viewing angle, great viewing effect under sunlight.
6. Display Resolution: 200 x 200
7. Display Screen Color: Black and White

Waveshare 4.3 Inch Capacitive Touch Display has an IPS display panel and a screen resolution of 800×480. This display has a capacitive touch-type screen and toughened glass touch panel that supports Raspberry Pi. Also, it has a DSI port for displaying, MIPI DSI Interface, and touch control.

Working With Raspberry Pi 4

Supports Pi 4B/3B+/3A+/3B/2B/B+/A+, CM3/3+*

1. 4.3 inch IPS screen. 800×480 hardware resolution.
2. Capacitive touch panel, support 5-point touch.
3. Supports Pi 4B/3B+/3A+/3B/2B/B+/A+.
4. Another adapter board is required for CM3/3+.
5. DSI interface, refresh rate up to 60Hz.
6. Supports Raspbian/Ubuntu/Kali and WIN 10 IoT, driver-free.

This is a Longer version of 4 wd double-layer smart car chassis. It comes with the four pairs of Geared Motors and Wheels. All the products included in this car kit are quality products. The chassis used in this kit is transparent to create dynamic handling of the components mounted on your robotic vehicle.

For more robotic vehicle kits, check out our Robots and Kits category.

CNC 3D Printer Mech Endstop Switch uses a lever switch to detect when it is activated. The switch is wired up so that when activated, it pulls the signal to LOW. There is also an LED on the board that will light up when the switch is activated. It uses a standard 4 pin 100″ pitch header and accepts a standard, old-style CD-ROM audio connector cable.

The mechanical endstop is a simple solution to a simple problem. We want to be able to detect when an X/Y/Z stage has reached its minimum or maximum. Instead of messing with flags or complicated light beam interruption, we use a mechanical switch.

If we place the switch in the path of the stage, then the stage itself will simply close the switch when it moves against it. Other than properly positioning the switch, we do not need to modify the stage at all. If you’re worried about reliability, you can sleep well at night. The switches we use are rated for 1 million operations before failure. Since we only use the switches once per print, that means you’ll be able to do one million prints before having to replace the switch

• Redline: connecting VCC (ramps of +)
• Black line: connecting GND (ramps of -)
• Green Line: connecting SIGNAL (ramps in s) 

1. Not easy to pull off, plug it convenient, for ease of use, plug the other side to do the one, you can use the direct plug.
2. Quality switching elements.
3. Customized high-quality connection wires using 22AWG copper wire with ratings of current 2A, 300V voltage.
4. An insulating layer over a wide range of temperatures, up to 80 degrees.

 Neodymium Block Strong Magnet is very useful for hanging or holding flat metal objects as well as a wide range of other magnetic applications. 

Rare earth neodymium magnets, also known as NdFeB magnets or Neo magnets, are made from an alloy of neodymium, iron and boron. They have excellent magnetic property and are extremely strong for their small size. Neodymium magnets are permanent, and have a high maximum magnetic energy.

Due to high ratio of performance over price, neodymium magnets has become extremely popular in almost all applications that require high performance magnets such as motors, sensors, computers, communications, medical equipment, meters, home appliances, craft model, jewelry and so on.

• Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.
• Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter sound meter, a reed switch, sensors.
• Electrical field: VCM, CD / DVD-ROM, generators, motors, servo motors, micro-motors, motors, vibration motors.
• Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery.
• Healthcare: MRI scanners, medical equipment, magnetic health products and so on.
• Other industries: magnetized Wax, pipe descaling, magnetic fixture, automatic mahjong machine, magnetic locks, doors and for windows magnetic, magnetic luggage, leather magnetic toys, magnetic tools, gifts and packaging.

1. Handling strong magnets in a proper manner is necessary to prevent personal injury and property damage, which include magnet damage.
2. These magnets are not toys. Please do not give neodymium magnets to children under 3 years old. Small magnets pose a choking hazard, and can be lethal if swallowed. In addition, large magnets can easily pinch fingers. So always supervise children when playing with magnets and be sure they are aware of the dangers involved.
3. Please keep magnets away from people who are wearing pacemakers or other medical devices. These magnets could also damage CRT monitors and TV’s.
4. It is recommended to wear gloves when handling magnets.
5. Always handle magnets individually. Do not handle multiple magnets at the same time unless they are widely separated or stacked together.
6. When placing magnets together, place a spacing material between them such as a piece of plastic, wood or cardboard so that they are easy to separate when needed.
7. Maintain a distance of at least 3 feet from other magnets or magnetically susceptible items when handling the magnets. Pay particular attention to scissors, knives, screw drivers or any other sharp metal objects.
8. To separate one magnet from the others, place them on a durable non-metal surface with the magnet-to-be-separated hanging off the edge of the table.

Voltage regulation in AC applications is cumbersome especially when you require variable output in dimmer, speed control of motors, pressure regulators, electric iron thermostat etc. This 2kW SCR Triac Electric Voltage Regulator can control upto 25A of mains current hence to reduce the chances of overheating due to this high current, it has very low resistance wire to reduce heating. The input voltage for this Regulator is in range of 110V-230V and output is in range of 90V-220V. The maximum power output of the regulator is 2000W which is more than enough for almost every electrical load in your home and even small electric motors in the small industries too. It is fast reliable and does not require any additional components to make it work thereby increasing the practicality of it.

Specifications:

• Small, reliable and easy to operate.
• Input Voltage Range: 110V-230V
• Output Voltage Range: 90V-220V
• Power Rating: 2000W
• Current Rating: 25A
• Suitable for Home Application.

SIMCOM SIM28ML GPS module is a standalone or A-GPS (Assisted Global Positioning System) receiver. With Built in LNA, SIM28ML can relax antenna requirement. It can also track as low as -165 dBm signal even without network assistance. And has excellent low power consumption characteristics (acquisition 16 mA, tracking 15 mA). It supports various location and navigation applications, including autonomous GPS, QZSS, SBAS ranging (WASS, EGNOS, GAGAN, MSAS), RTCM and A-GPS.

This is an Omni-directional antenna with an IPEX connector. Its working frequency is 2.4GHz which meets most requirements of Wi-Fi devices. With 6dBi high gain, it offers robust signal reception and transmission.

1. Frequency: 2.4 GHz
2. Gain: 6dBi
3. Cable Length: 15cm
4. Interface: IPEX MHF1
5. Supports LattePanda V1
6. Height: 170 mm/ 6.7 inches
7. Weight: 18g .

1. Radomematerial: polyurethane
2. Flexible cable
3. Stable signal
4. Best for indoor applications
5. Radome material: polyurethane
6. Flexible cable
7. Stable signal
8. Best for indoor applications.
9. Connector: IPX female to SMA-KY
10. Frequency(Hz): 900/1800
11. Gain: <3 dB
12. VSWR: <1.5  .