I don’t like alarm clocks. First off, they are always going off while I am trying to sleep. Secondly, they all look equally boring. Thankfully, the Maker Shed has a fix for the second problem. The Real Time Clock Parts Kit contains everything you need to make your own digital clock outlined in MAKE Volume 09. Just provide a unique enclosure and a buzzer, bell, or car horn. Wake up maker style!
- 1 16F684 Microcontroller
- 1 MAX7221 Display Driver
- 1 DS1305 Real Time Clock
- 1 32.768 kHz Watch Crystal
- 5 7 Segment LED Display
- 1 7805 Voltage Regulator
- 3 SPST Pushbuttons
- 1 Red LEDs (10pk)
- 1 10k Resistors (100pk)
- 1 200 ohm Resistor (100pk)
- 1 Protoboard
What about source-code for the processor? we gotta modify it!
Why do clock kits always include a realtime clock chip when a microcontroller with a crystal is perfectly capable of keeping accurate time? I’ve built several clocks from microcontrollers alone, and they are very accurate (gain/lose a second every few days).
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