Digital LED Electronic Clock Alarm DIY Soldering Kit experimental With Semtech SX1276 at its

With Semtech SX1276 at its core

·         1-to-8 Bidirectional translating switches

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

or more traditional batteries

Digital LED Electronic Clock Alarm DIY Soldering Kit experimental With Semtech SX1276 at itsAT89C2051 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