Arduino Project: Pro Mini Humidity Meter (Hygrometer)

Miniaturisation of the Arduino hygrometer project. Arduino code is here:

[maffysdad]

Nice to see that at 10:15 all the meters gave near enough the same readings, unlike near the start when you had that other board attached, was good to see you did away with it. Nice build.

[Jonesax]

You can make Arduino MCU enter in Power Down and wake it up every 8 seconds using Watchdog Timer. Maybe a button to turn on the display for a couple of seconds or use a Nokia LCD if it needs to be on all the time. With this strategy, I bet you can run for more than a month. I have doing this way in my DIY smartwatch.

[chartle]

This maybe the first project I've ever seen you finish. I think I started some time during the bike battery videos

[JerryEricsson]

When you get back to this project, try using an ATTINY85, or perhaps one of the mini ESP8266's for a processor, thus reducing your size even more.

[RedwoodRhiadra]

That mystery breadboard project was from your XOR Gate tutorial video.

[tommyallehamn]

+Julian Ilett well done! But have u though of minimizing or shrinking it to attiny85? ;)

[xxstormuxx]

Julian where is the video that you reviewed humidity sensors for Arduino? Having problem finding it. Best regards !

[sickvic]

Nicely done. Now how would I place ESP8266 CH340G WIFI and sensors (with or without oled) around my home and send to a central single screen or multiple oled's. AcuRite/ like?

[hrnekbezucha]

There are several videos explaining the power consumption and a lot can be done just with switching off analogue/digital conversion pins(if not needed). Another thing is brownout but that might be better kept on with a battery usage.

[martinocko]

what about using atryny85 for cpu it will be cheaper

[hunter]

Great little project a another great step would be a wireless connection, then internet to make this available via mobile phone to monitor while away.
Keep up the projects, they will finally hugely increase your views, Thanks.

[ProjectGuns]

Hi Julian,
Great little project, glad to see you doing an Arduino project.
Regards,
Stan

[barrygiblett]

can't wait to see what you are going to do with the barometer... might go well in my model aircraft...

[mineua]

Hi, Julian! May be you can build this thing with PIC (for your PIC tutorial series)? I assume tiny PIC use less energy than ATmega microcontroller?

[stupossibleify]

I'd be very interested to see how you minimise power from this great first optimisation in size. can you make use of hibernation functions?

[himselfe]

Swap out to a 3.3v pro-mini and you could easily fit a lithium battery in between the display and the board. Personally however I would have done away with the headers and used ribbon cable wire between the display and the pro-mini to get it even thinner.

[ElGatoLoco]

I enjoy the little comedy bits. Please continue with those.

[niniliumify]

have you checked out the OLEDuino boards on Hayri 's channel?

[NL-hcwz]

Can you list all the part numbers and the item used to hold the 9v battery etc...
My only wish is this had Wifi so I can connect to my wifi to submit data to a database.

[latogatottsagnoveles]

What about sticking a lipo between the lcd and the arduino?