Vishnu M Aiea
Published © MIT

Birthday Alarm That'll Run for 50 Years

An Arduino powered birthday reminder device that'll wish you happy birthday for 50 years on a single CR2450 coin cell.

IntermediateFull instructions provided4 days7,574
Birthday Alarm That'll Run for 50 Years

Things used in this project

Hardware components

Arduino Nano R3
Arduino Nano R3
Chinese clones of Nano or Mini with ATmega168P-AU
×1
Intersil ISL1208 RTC
×1
Renata CR2450N Coin Cell
×1
CP2102 USB to Serial Module
×1
USBasp Programmer
×1
32.768 KHz Crystal
×1
SPST Switch
×1
SMD LEDs
×1
Clear LED Dome
×1
4" x 4" Switch Box
Or you can 3D print an enclosure.
×1
Perfboard
×1
Berg Connectors (both M and F)
×1
Resistor 4.75k ohm
Resistor 4.75k ohm
×3
Resistor 10k ohm
Resistor 10k ohm
×2

Software apps and online services

ProgISP
To program the fuses and flash.
Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Dremel
Soldering iron (generic)
Soldering iron (generic)

Story

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Schematics

Birthday Alarm Schematic

Arduino Nano CH340G Schematic

Schematic of Arduino clone.

Renata CR2450N Datasheet

Code

Birthday Alarm

Credits

Vishnu M Aiea

Vishnu M Aiea

3 projects • 20 followers
Curious and passionate!
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