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Aug 12, 2025
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PuzzleClock is an alarm clock that makes you actually get out of bed. It makes you solve a random puzzle or game to disable the alarm and uses an ultrasonic sensor to detect if you try to return to bed instead of getting up. It is easy to build with an arduino uno and a few modules. It uses a rotary encoder, joystick, 128x64 lcd display, rtc module, ultrasonic sensor and passive buzzer. It can be powered through usb 2.0 or via a 9v battery.

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Component Link Price (USD)
LCD Display https://www.aliexpress.com/item/32815375122.html?src=google&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en32815375122&ds_e_product_merchant_id=107769163&ds_e_product_country=GB&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=17859500389&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_campaignid=17190468917s_url_v=2&albcp=17859500389&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_campaignid=17190468917 12.00
Ultrasonic Sensor Already have 0.00
Passive Buzzer Already have 0.00
M3 screws Already have 0.00
RTC Module https://www.aliexpress.com/item/1005007143596890.html?spm=a2g0o.productlist.main.3.556d350aziCGEs&algo_pvid=07fe5c58-f743-44aa-a00e-c5f6bd54c5aa&pdp_ext_f=%7B%22order%22%3A%222569%22%2C%22eval%22%3A%221%22%7D&utparam-url=scene%3Asearch%7Cquery_from%3Auery_from%3A 1.47
Joystick Module Already have 0.00
Arduino Uno Already have 0.00
CR2032 Battery (for RTC, cheaper from local store as no shipping and dont need bulk) https://www.sainsburys.co.uk/gol-ui/product/duracell-twin-coin-cell-battery--2032-3v 6.60
Case (3D Printed) Printed with personal 3D printer 0.00
Total: 20.07 usd

https://youtu.be/QP7oa8kY9pY?si=4fvSdRGS55Iz1UfS https://youtu.be/FKSQWud8iOQ?si=KUdgFA9AXLL66ojw

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