Digital LED Electronic Clock Alarm DIY Soldering Kit experimental or more traditional batteries

or more traditional batteries

voltage regulator

and over-temperature protection

The address can be changed to one of four options so you can have up to 4 ADS1115's connected on a single 2-wire I2C bus for 16 single-ended inputs

A single module can drive a total of 8 * 8 dot matrix overcast

Digital LED Electronic Clock Alarm DIY Soldering Kit experimental or more traditional batteriesAT89C2051 based of four electronic clock kit Supply voltage: 3V ~ 6V PCB Size: 52 x 42mm Function: Seconds correction (for precise School) Switch to every minute independent display interface whole point of time (8 20 o'clock chime can be turned off) Two alarm settings (you can turn off the alarm function) Feature: 0. 56 inch special red digital clock for display Import AT89C2051 for master chip 1. 2mm thick PCB made from military grade FR 4 board