Retro RTC

5th of April’10

<1130> Got up after a long sleep.

<1200 – 1300> WTH was I doing then? Probably taking some pills for having a good memory huh!

<1330> Had lunch.

<1600> Came back to room.

<1630> A KNOCK at my door.

A friend of mine was asking for some assistance in his mini project. I thought it would be fun and started discussing about it. It’s a retro RTC (Real Time Clock). The fact that I call this a retro is that he didn’t want to use any RTC chip and he brought an AT89C2051 microcontroller for this 24 hour clock project.

<1700> Project started.

It has a timer facility as well. The relay in the above picture is to drive a load connected to AC mains.