By Bianchi Gabriele on August 6, 2022
On this undertaking we are going to see find out how to construct a programmable countdown timer within the vary of 1s – 9999s which can be utilized in home or industrial functions in addition to by newcomers to discover ways to assemble an digital module and cargo a program.
Through the chosen time interval, the system can energy a load via a relay on the board. For repeated timings it’s doable to memorize the length of the timing, the top 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 exhibits data on an LED show (such because the one based mostly on the TM1637 chip, used on this case, or the TM1650).