Small Projects #59: Arduino Clock with Temp/Humidity

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Blog entry by Madmark2 posted 04-02-2022 11:34 PM 487 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 58: Rick Head Gadget Box Part 59 of Small Projects series Part 60: 3D printed TK splitter & install tool »

This is another in a continuing series of weather stations. This one was built around Arduino CPU core and a scrolling red LED display. The entire unit was built with a Lexan front and rear panel and wrapped with walnut and black limba.

It does other things too. It does AM/PM or 24 Hr, F or C temp, It chimes on the hour (hours can be set). It has an alarm clock with everything backed up so it doesn’t lose any setting after a power blip,. It has a “coffee pot” relay that comes on with the alarm and automatically shuts off after one hour. Most of the functions are remote controlled and it has a single knob and button for data entry.

The case is dado’d for the 1/8” red Lexan front panel and the back is rabbeted for the 1/4” Lexan back.

The thicker back allowed components to be mounted directly by drilling and tapping the Lexan for 6-32 screws.

Tip: Hand tap Lexan, power tapping melts.

To hide the dado slots the top and bottom are end dado’d so none of the rabbets or dados for the panels show.

The little circuit cards that implement each Arduino function often have no mounting holes. I used my 3D printer to make holders, mounts, cable ends, and the like.

Everything is mounted with #6 or #4 hardware. All of the screws are SS Allen cap head machine screws. Both red fiber and SS washers along with nyloc nuts means the project will last a good long time.

The unit logs the weather information to an internal MicroSD card. This card can be removed and the data plotted (I haven’t written that part yet.)

The alarm clock can say certain phrases to announce the hour and wake up. These canned phrases are stored on another microSD card, this one inserted in the onboard MP3 player.

Time is kept with a battery backup and the control params like the alarm time and state are stored in EEPROM so the box “never forgets”.

Anyway, if you are interested in the electronics side of things, check out the build blog HERE

-- The hump with the stump and the pump!

3 comments so far

View Redoak49's profile


5622 posts in 3483 days

#1 posted 04-03-2022 12:57 AM

I really like this….nice job.

View pottz's profile


26563 posts in 2478 days

#2 posted 04-03-2022 01:48 AM

thats pretty damn cool mark.nothing i could ever figure out.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Madmark2's profile


3485 posts in 2082 days

#3 posted 04-03-2022 02:34 AM

~2000 lines (including comments) of Ardruino’s version of C++

This is my 2nd Arduino project. Here’s the first:

It didn’t get posted here because there was no wood in it. :D

I made lots of pieces using my $150 3D printer, review HERE

-- The hump with the stump and the pump!

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