Simple Arduino Book clock




This book clock was inspired by florinc and the impresive selection of clocks like the wise clock3 etc
http://www.instructables.com/member/florinc/

My girlfriend likes reading books and there is always a pile of them around the house, however to be able to build this for her birthday present I had to source the book from a second hand shop, looking for a nice chunky one that the clock could sit nicely inside. So, thanks to Charlotte Bingham and the Business I had the perfect cover 🙂

The rest of the parts came from the Web or the tinkerers paradise eBay

1 x ATmega328P
1 x DS1307 RTC
2 x 10K resistors
2 x 22pf capacitors
1 x 16MHz Crystal
1 x 32768Hz Crystal
1 x CR2032 battery
1 x CR2032 holder
1 x 16 pin DIL socket
1 x Sure Electronics 3208 display
PVA glue
MDF, Thick Cardboard or plastic

Arduino Book clock




Step 1: Recycle an old book

First off remove the outer cover, then remove the pages by cutting down the side with a knife. As books tend to differ I will let you decide the best way to do this.
Once the pages are out of the way you can mark out the position of the display on the spine, Cut this out neatly as it can show through if you get heavy handed,
I also had to cut the edge of the display off so it would fit inside the spine of he book. if you look carefully down the edge of the 3208 display you can see that the tracks run just along the edge of the LED matix, so if you draw a line from the centre of the scew holes you can safely cut down there without risk of damaging anything important.
Just take your time, while I was cutting the first one I had some shavings get lodged on the chip, needless to say that one is now a paper weight. 🙁

looking back on it now what I also should have done was paint the spine black before glueing the cover back on, as the display is mainly black and the book is a lighter colour it tends to create a shadow line and stands out, if it had been painted black before hand I would imagine it would blend in more.

Once the hole is cut out ready for the display you can start glueing the outer sleeve to the hard back cover. I used PVA glue and brushed it on so there were no lumps.
When it comes to the display I first coated it with PVA and also the cover, then brushed the pva to get rid of the lumps and stuck one on top of the other. Chuck a nice weight on top to hold it in place while it dries.

Just make sure that you do this step after you have built and tested the electronics as you also have to make sure the display is the right way round!

This is where the pages of the book come in handy, you can always read them until the glue is dry.

Step 2: Electronics time!

Schematic Arduino Book clock

Right, now you need all of the electronic bits, you may notice that I have an onboard 5V regulator which is not shown on the diagram, that is because I didnt have a 5V power supply at the time, that would have been easier!

There is hardly anything to the electronics, the big question is how you want to program the chip, I added a riser to pins 1, 2, 3 and Gnd.
Then using jumper wires I linked the chip to an Uno connected to the PC, you need to enter two different programs, one to set up the DS1307 time and date and the second that runs the display.
The other option is to remove the ATmega and place it in a UNO for programming, then back in the book etc, but you will see later why this has its own challanges.

You just got to love the telephone wire, all sorts of colours and a solid core, nice for jumper wires on a DIY PCB.

Step 3: Putting the book back into BookClock

I used some 9mm MDF that I had around the house @ 52mm wide, this just happened to be the correct size 🙂

Cut it so you have a couple of mill between this and the edge of the book, I used PVA glue to hold it together then hot glued it in place after, I have a small adiction to hot glue 🙂 If it moves stick it in place, if it should move then scrape some of the hot glue back off.
That is the moral to most of my projects!

I also added some hot glue around the display to give it some stiffness.

I then stuck a small strip of wood on the cover and added some screws to hold the thing together.

Major Components in Project

1 x ATmega328P
1 x DS1307 RTC
2 x 10K resistors
2 x 22pf capacitors
1 x 16MHz Crystal

 

For more detail: Simple Arduino Book clock

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