ColdMac

Status

Extremes

Logging Started On: Dec 4th 2016

Ambient Temperature High: 45.6° F
Ambient Temperature Low: 28.7° F

Relative Humidity High: 66.8%
Relative Humidity Low: 50.3%

Dew Point High: 31.8° F
Dew Point Low: 18.4° F

Processor High: 81° F
Processor Low: 54° F

Graphics Chip High: 84° F
Graphics Chip Low: 66° F

Logic Board High: 77° F
Logic Board Low: 59° F

Hard Drive High: 75° F
Hard Drive Low: 59° F
From to Now

Ambient Temperature High: ° F
Ambient Temperature Low: ° F

Relative Humidity High: %
Relative Humidity Low: %

Dew Point High: ° F
Dew Point Low: ° F

Processor High: ° F
Processor Low: ° F

Graphics Chip High: ° F
Graphics Chip Low: ° F

Logic Board High: ° F
Logic Board Low: ° F

Hard Drive High: ° F
Hard Drive Low: ° F

Specs

Machine: Late 2006 iMac 20"
Processor: Intel Core2Duo 2.16 GHz
GPU: ATI Radeon X1600
RAM: 2 GB
Hard Drive: 80 GB
Wifi: 802.11 a/b/g/n
Mac OS X 10.6.8 (Snow Leopard)
Apache 2.2.24 / PHP 5.3.26 / MySQL 5.5.29

Official “Limits”

Operating Temperature: 50° to 95° F
Storage Temperature: -40° to 185° F
Relative Humidity: 5% to 95%

Contact

For questions, comments, suggestions, and general feedback, you can contact us via:

@BrrrColdMac
@MacFixerBoston
MacFixerBoston
Email

28.8° F
Ambient
64.8%
Humidity
18.4° F
Dew Pt
54° F
Processor
66° F
Graphics
59° F
Logicboard
61° F
Hard Drive

Alert! This web page has lost contact with the server, and as such, the values on this page are no longer live.

Please note, you do not have to reload the page. Just sit tight and this page will automatically reconnect to the server once it's back up.

24 Hour Temperature History

Daily Temperature Range:

Sponsor

Practical Design Group has donated an awesome USB Thermometer & Hygrometer (THUM) to this project. As you can see, it works great! The ambient temperature, relative humidity, and dew point readings are coming from the THUM.

About This Mac

Don't refresh this page!
This page uses fancy javascript and other web technology to update itself in real time, without the need to reload the whole page.

ColdMac is an old Apple computer that lives in my shed and tracks it's own internal and external temperature, and also hosts this webpage about itself. I also have it playing music via iTunes 24 hours a day.

The shed this Mac lives in is very cold. It is not insulated, the door has no seal, and there are two vents in the walls. So while there is a very limited amount of thermal protection, it's generally within 5 degrees or less of the actual outside temperature at night. During a sunny day, the shed can warm up much warmer than the outside temp.

This Mac is a 2006 intel Mac. It is loaded with internal thermal sensors. I also use a USB THUM sensor to get ambient thermal readings. Every 10 seconds, a shell script polls all sensors, and records the values into a MySQL database.

The hardest part of making this project is always the charts. The rest of the site is actually pretty simple components, that are pieced together in an interesting way. But making the charts has always been a problem. I used flash charts in the past, but I have since switched to google HTML5 based charts so you can see them on mobile devices. Setting them up is not nearly as easy as google thinks it is, but with persistance, they do work.

Previous Winters

Archives