DS3231 is a six terminal device, out of them two pins are not compulsory to use. So we have mainly four pins. These four pins are given out on other side of module sharing the same name (Battery will not be included).
DS3231 RTC MODULE Features
- RTC counts seconds, minutes, hours and year
- Accuracy: +2ppm to -2ppm for 0ºC to +40ºC , +3.5ppm to -3.5ppm for -40ºC to +85ºC
- Digital temperature sensor with ±3ºC accuracy
- Two Time-of-day alarms
- Programmable square wave output
- Register for Ageing trim
- 400Khz I2C interface
- Low power consumption
- Automatic power failure battery switch circuitry
- CR2032 battery backup with two to three year life
- Potable size
DS3231 RTC MODULE Specifications
- Operating voltage of DS3231 MODULE: 2.3V – 5.5V
- Can operate on LOW voltages
- Consumes 500nA on battery backup
- Maximum voltage at SDA , SCL : VCC + 0.3V
- Operating temperature: -45ºC to +80ºC
ESP32-S2-WROVER is a powerful, generic Wi-Fi MCU module that integrates ESP32-S2. It has a PCB antenna, a 4 MB external SPI flash and an additional 2 MB PSRAM.
All available GPIO pins (except for the SPI bus for flash and PSRAM) are broken out to the pin headers on the board. Users can program ESP32-S2 chip to enable multiple functions such as SPI, I2S, UART, I2C, touch sensors, PWM etc.
ESP-12F based IOT module which will give 5V / 9V outputs from five digital pins of ESP-12F. 5V outputs can be used to control TTL / CMOS ICs. Output will be 5V if the jumper is conncted across COM and 5V. Similarly, output will be 9V if the jumper is connected across COM and Vin. You can control your devices like electric bulbs from Android applications through this module. Screw terminal output interfacing is also provided for 5V / 9V digital outputs.
ESP-12F IOT module programmer circuit : https://haberocean.com/2019/05/esp-12f-iot-module-programmer-circuit/
32-bit serial-in parallel-out shift register module using ESP-12F IOT module : https://haberocean.com/2019/05/32-bit-shift-register-module-using-esp-12f-iot-module/
Control the outputs of ESP-12F IOT module from an Android App : https://haberocean.com/2019/06/part-3-of-control-the-outputs-of-esp-12f-iot-module-from-an-android-app/
7-digit seven segment display using ESP-12F IOT module through 32-bit serial-in parallel-out shift register module : https://haberocean.com/2019/07/7-digit-seven-segment-display-using-esp-12f-iot-module-through-32-bit-serial-in-parallel-out-shift-register-module/
Purchase from Amazon : http://www.amazon.in/dp/B07TTRN6GW?ref=myi_title_dp
Low noise electret MIC pre-amplifier module can be used to sense sound signals and to amplify it to a high voltage. This module can be used with a power amplifier to make MIC and speaker circuit. This can also be used as sound sensor module.
Operating voltage – 9V
Working of low noise electret MIC pre-amplifier module : https://haberocean.com/2019/08/working-of-low-noise-electret-mic-pre-amplifier-module/