Project tutorial
Simplest UNO Digital Clock Ever

Simplest UNO Digital Clock Ever © GPL3+

The simplest Arduino LCD clock ever designed. Only needs an Arduino UNO, a 1602 LCD, and two buttons. No resistors, no potentiometer.

  • 3,961 views
  • 9 comments
  • 26 respects

Components and supplies

About this project

I tried the clock from here:

https://www.hackster.io/Annlee_Fores/simple-arduino-digital-clock-without-rtc-7d4303

and found lots of problems in it, so decided to improve it.

Now the incrementation of s will be every 1 second and no more depending from the loop{} execution time.

RESISTORS AND POTENTIOMETER SUCKS, I removed them completely.

For the Pullup of the time setting buttons, you can use the one integrated in the ATmega328P chip...

pinMode(hs, INPUT_PULLUP) avoids to use a external pullup.

Avoid the LCD Contrast Potentiometer !

The contrast of the LCD can be set with a Arduino PWM signal.

Same for the Backlight, powered with the Arduino PWM signal, so it can be set on / off and intensity by the Arduino.

Here is a short video about this precision clock!

Code

Simplest ever UNO clock with LCD
Precision LCD clock , simplest ever design, with no potentiometer, no resistors, only the UNO, the 1602 LCD, the 2 push bittons

Custom parts and enclosures

Fritzing file simplest UNO clock ever
simplest_ever_uno_digital_clock_9sVAc25Brc.fzz

Schematics

Schematics simplest UNO clock ever
Simplest clock ever schematics xjhbf9q6ei
Breadboard wiring simplest UNO clock ever
Breadboard wiring simplest uno clock ever ypkwxzowdr

Comments

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