Arduino Based Optical Tachometer 6 SunFounder Basic Sensor Kit for Arduino UNO R3 Mega2560. The maximum input voltage for the analog pin is 3.2V. Arduino IDE to support the ESP8266 boards. Please pay attention when you connect other active peripherals to the I/O pins, because this is a 3.3V logic level device and higher levels on any pin could damage it. The integrated 5V switching power supply (1A) is followed by a 3.3V LDO to supply power for the Wifi module and the 3.3V output (power supply for sensors and shields). ![]() The PWM resolution is 10bit (1MHz frequency). The D1 features an on-board switching power supply which allows you to power the board from a power supply up to 24V, 11 GPIO pins (can be used as input/output/PWM/I☬, except D0), and 1 analog input. ![]() This board is compatible with the Arduino IDE and with NodeMCU. 80 MHz Processor / 4M Flash FCC Certified ESP8266-12F Module 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported (except for D0). This WeMos D1 R2 development board for Arduino / NodeMCU is a WiFi capable ESP8266 based development board in the format of the Arduino UNO R3.
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