The DS3231 is a low-cost, extremely accurate
The DS3231 is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I²C bidirectional bus.
A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a µP reset.
Accuracy ±2ppm from 0°C to +40°C
Accuracy ±3.5ppm from -40°C to +85°C
Battery Backup Input for Continuous Timekeeping
Operating Temperature Ranges
Commercial: 0°C to +70°C
Industrial: -40°C to +85°C
Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Up to 2100
Two Time-of-Day Alarms
Programmable Square-Wave Output
Fast (400kHz) I²C Interface
Digital Temp Sensor Output: ±3°C Accuracy
Register for Aging Trim
Active-Low RST Output/Pushbutton Reset Debounce Input
SIM868 module is a complete Quad-Band GSM/GPRS module which combines GNSS technology for satellite n
This wireless transceiver module is an easy
This wireless transceiver module is an easy and suitable module if you want to setup your wireless communication system with low cost!! It can achieve a good balance between wireless transition performance and cost! You can easily add it with your own MCU/ARM/PIC/AVR/STM32 system! What\'s more, this NRF24L01+ module is designed with Power amplifier and SMA antenna. This allowed you to use the wireless communication up to 1000 meters! (No barrier)
Operating voltage: 3 ~ 3.6V Max
Multi-frequency: 125 frequency
Support up to six channels of data reception
Communication distance: up to 1000 meters (No barrier)
Arduino NANO with ATmega32
Arduino NANO with ATmega328 Microcontroller is an ultra-low size Arduino board with AVR architecture and based on Atmel Atmega328P-AU microcontroller, which includes all capabilities of Arduino Duemilanove except DC power jack in the smallest size.
This miniature board is like an Arduino UNO type, but with a smaller size, which is suitable for a flyer and tiny robot. This Arduino is idealized for breadboard working too.
The Arduino NANO is equipped with 8 pins for analog inputs (to run 10-bit resolution means 1024 different values), and 14 digital IO pins that 6 pins can be used for PWM outputs, 2pins for serial receive and transmit data, 2pins for external interrupts, 4pins for SPI serial ports, and on for LED indicator. It also has a pin for reference voltage input for analog reference comparison and one pin for reset the microcontroller.
This Arduino chip operates with a TTL logic level of 3.3V DC and can be supplied with a recommended voltage of 7V to 9V DC. It can easily be supplied through a micro-USB to USB cable from any USB port or through the AC to DC or a 9V battery. It is also compatible with 1.0 Arduino pinout and any shields with 3.3V DC.
Arduino NANO can withstand maximum input and output voltage of 3.3V, which means that applying more than 3.3V DC to any input or output pins may damage the board. This board has all the requirements of the microcontroller support.
Arduino is an open-source platform based on simple userfriendly hardware and software.
The Arduino board can be employed as a slave operator, that performs simple digit works based on instructions.
Operating Voltage: 5 V
Flash Memory: 32 KB of which 2 KB used by bootloader
SRAM: 2 KB
Clock Speed: 16 MHz
Analog IN Pins: 8
EEPROM: 1 KB
DC Current per I/O Pins: 40 mA (I/O Pins)
Input Voltage: 7~9 V MAX
Digital I/O Pins: 22 (6 of which are PWM)
PWM Output: 6
Power Consumption: 19 mA
PCB Size: 18mm x 45 mm
1 x Load cell
1 x Load cell 0-5KG
1 x HX711 24BIT Precision ADC Module on breakout board
10 x Breakaway header pins for HX711 connection
Everything you need to take accurate force measurements with and Arduino, Raspberry Pi, or other microcontroller in one complete package!
Load cell - Sturdy aluminum alloy construction. Strain gauges pre-attached with strain relieved wires. Accurately measures forces from 0-5kg (0-11 lb).
HX711 - This top of the line load cell amplifier mounted on a breakout board pairs perfectly with the load cell to provide fast, accurate force measurements. It measures small changes in the resistance of the strain gauges mounted to the load cell and passes these values directly to any microcontroller (like an Arduino or Raspberry Pi).
Load cell specs:
-Wire leads pre-attached, 22 cm (8.5 in) long
-Dimensions 12.7 mm high, 12.7 mm wide, 80 mm long (0.5 in x 0.5 in x 3.15 in)
-4 mounting holes, 15 mm spacing on each side. One side both holes tapped M4 thread, the other side both holes tapped M5 thread.
-Operation Voltage: 2.7V–5V
-Operation Current: < 1.5mA
-Mounted on breakout board
-Includes breakaway headers for connection, soldering required
Red to E+
Black to E-
Green to A+
White to A-
TXD: serial transmit, 3.3V TTL level.
TXD: serial transmit, 3.3V TTL level.
RXD: serial receiver, 3.3V TTL level.
CTS: serial flow control, is not supported.
RTS: serial flow control, is not supported.
DC: simulation, burning clock pin.
DD: simulation, data burning feet.
RST: reset pin module requires low level of not less than 5ms reset.
VCC: module power foot, requiring DC 3.3V power supply current is not less than 100mA.
GND: module common ground.
LED: LEDs module output pin, high output, series resistor connected LED.
Slave bright one second every two seconds. Once connected, LED lit.
KEY:. Input pin, internal pulldown This foot high, clear the record for the host address from the machine.
PIO: extended functionality for setting the module master-slave mode, the default internal pull-up resistor from the machine; external 1K pull-down resistor connected to ground, as the host. Currently only supports 9600bps communication, does not support the AT commands. Host, when pass-through traffic from the machine, there must be a certain time interval between packets. For example, the packet length is 500 bytes, then the transmission time interval between packets can be set to no less than 600ms. Otherwise, you may lose data.
Features: - Ultra-small 802.11b/g/n Wi-Fi + BT/BLE SoC module
Features: - Ultra-small 802.11b/g/n Wi-Fi + BT/BLE SoC module - Low-power dual-core 32-bit CPU for application processors - Up to 240MHz, up to 600 DMIPS - Built-in 520 KB SRAM, external 4M PSRAM - Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC - Support OV2640 and OV7670 cameras with built-in flash - Support for WiFI upload -Support TF card - Support multiple sleep modes - Embedded Lwip and FreeRTOS - Support STA/AP/STA+AP working mode - Support Smart Config/AirKiss One-click distribution network - Support for serial local upgrade and remote firmware upgrade (FOTA) Description: CES NEWS' Geekcreit ESP32-CAM WiFi + Bluetooth Camera Module Development Board ESP32 With Camera Module OV2640 2MP - Board & Shield Motherboard & Development Board. The ESP32-CAM has a very competitive small-size camera module that can operate independently as a minimum system, measuring the only 27*40.5*4.5mm, with deep sleep current and a minimum of 6mA. ESP-32CAM can be widely used in various IoT applications. It is suitable for home smart devices, industrial wireless control, wireless monitoring, QR wireless identification, wireless positioning system signals and other IoT applications. It is an solution for IoT applications. ESP-32CAM is packaged in and can be directly plugged into the backplane for quick production. It provides customers with a highly reliable connection method and is convenient for use in various IoT hardware terminals. Note: This product contains the OV2640 Camera Module. If you need to use the OV7670 camera, please purchase it separately. Package Included: 1 x ESP32-CAM Module 1 x Camera Module OV2640 2MP Product Specifications: ESP32-CAM Picture Output Format Rate: Test environment: camera model: OV2640 XCLK: 20
This is WiFi serial transceiver module, based
This is WiFi serial transceiver module, based on ESP8266 SoC.
The SOC has Integrated TCP/IP protocol stack
We have a set of documents in Chinese. We are preparing tutorials and demo software to showcase utility of this module.
ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to offload all Wi-Fi networking functions from another application processor.
ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area.
SDIO 2.0, SPI, UART
32-pin QFN package
Integrated RF switch, balun, 24dBm PA, DCXO, and PMU
Integrated RISC processor, on-chip memory and external memory interfaces
Integrated MAC/baseband processors
Quality of Service management
I2S interface for high fidelity audio applications
On-chip low-dropout linear regulators for all internal supplies
Proprietary spurious-free clock generation architecture
Integrated WEP, TKIP, AES, and WAPI engines
Wi-Fi Direct (P2P), soft-AP
Integrated TCP/IP protocol stack
Integrated TR switch, balun, LNA, power amplifier and matching network
Integrated PLLs, regulators, DCXO and power management units
+19.5dBm output power in 802.11b mode
Power down leakage current of <10uA
Integrated low power 32-bit CPU could be used as application processor
SDIO 1.1/2.0, SPI, UART
STBC, 1×1 MIMO, 2×1 MIMO
A-MPDU & A-MSDU aggregation & 0.4ms guard interval
Wake up and transmit packets in < 2ms
Standby power consumption of < 1.0mW (DTIM3)
1. Support 802.11 B/G/N
1. Support 802.11 B/G/N
2. Communication range up to 100 yards depending on environment.
3. Standard 3.3VDC operation with 5V compatible I/O.
4. Standard 3 wire (TXD/RXD/GND) serial communication (idle high) at 115200/8/N/1.
5. Standard 0.1" (2.54mm) half through hole.
6. Upgradeable firmware.
7. Three mode of operations: Client/Access Point/Both Client and Access Point.
8. Support all major security schemes: OPEN/WEP/WPA_PSK/WPA2_PSK/WPA_WPA2_PSK.
9. Support both TCP and UDP communication.
10. Working as TCP/UPD server supports up to five (5) connections.
11. Working as station can connect up to 5 TCP/UPD servers. The ESP-04 can connect to all standard non-SSL websites in the world.
12. Simple AT commands for all operations.
13. Connection based data reception or transparent data reception.
14. Programmable client connection inactivity timeout.
15. Automatic domain name address resolution for public domain name but not the local name within the local area network (router).
1X(The ESP8266 is a chip highly designed fo
1X(The ESP8266 is a chip highly designed for the needs of a new connected world.
It offers a complete and self-contained Wi-Fi network solution, allowing you to either host the application or download all Wi-Fi network functions from another application processor.
Its high degree of integration on the chip allows minimal external circuitry, and the complete solution, including the input section module, is designed to occupy a minimum area of PCB.
Dimensions: 4 x 3 x 0.3 cm
Color: Blue; 100% New and high quality. This product is your best choice. Do not hesitate. It is time to replace your old, worn, damaged product.
This module requires a voltage supply of 3.3 for VCC, and 3.3V of logic.
Can not accept 5V.
Connecting the RX or TX over 5V Arduino will destroy this module.
You must use a logic level converter, or a 3.3V for Arduino
The supply of 3.3V on the Arduino Uno has an inadequate current capacity to power this module.
It must provide a separate power supply and higher than 3.3V (approximately 300mA or better)
1 x Wireless WiFi Remote Transducer Module ESP8266 Serial Esp-07 LWIP AP + STA
Only the above package content, other products are not included.
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.)