By Bianchi Gabriele on August 6, 2022

On this challenge we are going to see easy methods to construct a programmable countdown timer within the vary of 1s – 9999s which can be utilized in home or industrial purposes in addition to by rookies to discover ways to assemble an digital module and cargo a program.

Throughout the chosen time interval, the system can energy a load by way of a relay on the board. For repeated timings it’s potential to memorize the length of the timing, the tip of the time interval is signaled acoustically with a “beep” and optically by turning off the LOAD POWER LED.


The wiring diagram relies on the Arduino Nano microcontroller which reveals info on an LED show (such because the one primarily based on the TM1637 chip, used on this case, or the TM1650).

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