DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. Compared to the DS1302 solution, the DS3231 has many advantages, it function with a VCC ranging from 2.3V to 5.5V and has a battery backup. Unlike
“An open-source firmware and development kit that helps you to prototype your IOT product within a few Lua script lines” Based on ESP8266 ESP12E wifi board, on-board USB-TTL support directly flashing from USB port, also on-board power circuits and all IOs setup.
It's a small USB to TTL serial tool, using the PL2303 chip.
You can use it to connect some serial device to your PC via USB port, an avr, an msp430 or an stm32 for example.
It's very cheap compared to the ft232 alternative and works very well, up to more than 1mbit/s.
This protoboard is double sided, meaning that you can easily put components on both sides. It is perfect for all your DIY projects, as with its 0.1" (2.54mm) pitch it fits nearly all the through hole components.
Put on your sunglasses before using this matrix with 64 eye-blistering RGB LEDs adorn the panel for a blast of configurable color. Arranged in a 8x8 matrix, each pixel is individually addressable. Only one pin is required to control all the LEDs. You can cut a trace and use nearly any other pin if you need some customization.