Sparkfun Electronics Big Time Owner's manual

The SparkFun Big Time kit is an entry-level kit that enables you to
build your own watch. This kit, designed for beginner to intermediate
level electronics enthusiasts, contains all the parts you need to put
together a functioning wrist-watch. Sure to get attention, the Big
Time kit will have all your friends wondering where you got your watch
- and you can tell them you built it!
Kit Includes:
•ATMega328
•7-segment display
•0.1uF capacitor (qty:2)
•100k resistor
•32kHz crystal
•Button
•Coincell Battery
•Battery holder
•Enclosures (qty:2)
•Screws (qty:4)
Big Time
Kit Information & Instructions
Page 1

To Set the Clock
Hold down the button until you see the colons blink.
Continuing to hold the button will cause the time to increase.
Soldering
The tip of the iron is normally 700 °F, hot enough to melt metal. It is normal for
the handle of the soldering iron to heat up a bit. Hold it like a pencil and move
your hand further away from the tip if the heat is uncomfortable. The solder
smokes because the rosin inside the solder is burning off - it’s not harmful.
Microcontroller and PCB
The microcontroller is the brain of the watch. It comes pre-programmed
to run the clock properly. It is designed to withstand the heat of the
soldering iron and gentle bending of its legs. Just be reasonably
gentle with it and you should be fine.
© SparkFun Electronics, Inc.All Rights Reserved. The SparkFun Big Time Kit features, specifications, system requirements,
and availability are subject to change without notice. All other trademarks contained herein are the property of their
respective owners.
Learning More
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