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PCF8591 is a monolithic, single supply, low-power, 8-bit CMOS data acquisition devices. PCF8591 has 4 analog inputs, one analog output and a serial I2C bus interface. PCF8591 of three address pins A0, A1 and A2 can be used for programming the hardware address, allowing access to eight PCF8591 devices on the same I2C-bus, without the need for additional hardware. Input and output on the PCF8591 device address, control and data signals through two-line bidirectional I2C bus serially transmitted.PCF8591 Key performance indicators: single power supply PCF8591 operating voltage range of 2.5V-6V  Low Standby Current via I2C-bus serial input / output PCF8591 by 3 hardware address pins addressing PCF8591 I2C bus speed sampling rate decision 4 programmable an...
Description:Brand new and high qualityVoltage: 12VDiameter: 28mmStep angle: 5.625 x 1 / 64Reduction ratio: 1 / 645 Line 4 phase can be driven by ordinary uln2003 chip can also be connected in phase 2development board used for.supporting the use of a direct plug and easy to use stepper motor used in the development board.Stepper motor driver board with ULN2003A, B, C, D four-phase LED indicates the status of the stepper motor workStepper motor with a standard interface, when used directly pluggableOriginal box: NOLength: 274mmNet weight: 43g  Package Included:1PCS*ULN2003 Stepper Motor Driver Board Module for Arduino AVR ARM 1PCS*12V Stepper Motor
describeESP32 Rev1 Wi-Fi, the Bluetooth built-in ESP - WROOM - 32 microcomputer module, is used on the test circuit board. The central part of the test circuit board plug is compact, 300 mil wide, and the other parts are blocked. In addition, the reset and program write mode switching circuitry is also loaded, so there is no need to make it on another model.Use instance pictures   Notice:This product is shipped without welding. The shipping list is shown below.
200 w pixel OV2640 camera module latest STM32F4 drive source support JPEG output standard camera lens focal length is 3.6 mm, other high-grade megapixels camera is optional.1. The module introductionALIENTEK ATK - OV2640 camera module, using the 1/4 inch OV2640 millions of hd CMOS sensor.High sensitivity, high flexibility and support JPEG output etc.And can support exposure, white balance and chroma, saturation, contrast, and many other parameters setting, support JPEG/RGB565 format output, can meet the demand of different occasions. Module performance parameters:1, sensor size: 1/4 inch.2, pixel: 1600 * 1200 (200 w).3, the output format: RGB565 / JPEG/YUV/YCbCr, etc.4, control interface: SCCB. 5, working voltage: 3.3 V6, module size: 27 mmx27mmOV2640 image sensor has 2 million p...
describe18650 shield has a strong ability for 18650 battery charging and discharging. It will be very helpful for a lot of projects.It is a better solution than 18650 shield V1 which could charge and discharge at 3A. It also has 4 LEDs to show the charging status and dump energy. It could detect target when the output current is less than 30mA the board will shut off automatically. The sleeping current is only 6 uA. When you click once the button, charging work will start and LEDs will show the dump energy. When you keep clicking the button over 2.5s, output will stop.. Parameter:Over charging protectionOver discharging protection4 LEDs indicationTemperature protectionBattery short protectionClick button will start workClikc button 2.5s will stop output go to sleep mode.If output...
Test program/** Connect the SD card to the following pins:** SD Card | ESP32* D2       12* D3       13* CMD     15* VSS     GND* VDD     3.3V* CLK      14* VSS      GND* D0 2 (add 1K pull up after flashing)* D1 4*/#include "FS.h"#include "SD_MMC.h"void listDir(fs::FS &fs, const char * dirname, uint8_t levels){Serial.printf("Listing directory: %s\n", dirname);File root = fs.open(dirname);if(!root){Serial.println("Failed to open directory");return;}if(!root.isDirectory()){Serial.println("Not a directory");return;}File file = root.openNextFile();while(file){if(file.isDirec...
Features:1, Super compatibility. Full support for Win8,For Win7,For WinXp,For Win2K,For WinCE,For Linux,For Mac systems, 32, 64 system.2, Ultra-small size: the board is only 3.5*1.8cm.  Even in those two USB ports on a very tight distance laptops can easily be placed side by side two.3, Power output: you can use this module to the microcontroller system power supply, convenient debugging. 5V-500mA or 3.3V-100mA.4, Overcurrent protection: on-board self-recovery fuse, even if the positive and negative short-circuit will not damage the circuit board or computer. If there is a short circuit or current exceeds 500mA, the fuse will automatically disconnect, to be restored non-shorted state circuit fuse back to normal. Effectively protect the security of your computer.5, Four levels of freed...
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