How to use the real time clock module and how to display the time in the LCD?

Thread Starter

Gab Cruz

Joined Nov 16, 2015
28
Hi all, I would like to create a digital clock project and I plan to use the real time clock module and display it in a small LCD. The project is pretty straight forward. If you have some suggestion on how to create a digital clock project (a cheaper one is much appreciated) please refer it to me. In addition, is there an LCD that only display the time only (not the typical 16x2 board)?
 

Thread Starter

Gab Cruz

Joined Nov 16, 2015
28
Is it possible to use ATTINY85 as the programmer and 7segment display for the time? Is it cheaper than the rtc module?
 

MrChips

Joined Oct 2, 2009
21,133
Does it comes in different modules? I thought it's only one. Sorry, I have no idea. Could you recommend some? Probably a low cost one.
Is there one RTC? Which one do you know of?

If you are trying to create a time-of-day clock, there are various ways to implement the time keeping function.
  1. You can use the internal quartz crystal clock of the MCU.
  2. You can use the MCU's internal RTC module if it happens to have one.
  3. You can use an external RTC module. There are many to choose from.
  4. You can use an external crystal controlled oscillator.
  5. You can use the 50Hz or 60Hz AC line frequency.
  6. You can use more sophisticated time keepers such as internet, GPS, WWV, NIST, etc., but let's not get carried away here.
 

spinnaker

Joined Oct 29, 2009
7,835
One step at time.

The TS needs to display something on the LCD. The RTC just complicates things right now. RTC can come later.
 
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