Dr. Scott M. Baker

Network Thermometer

I needed a gadget to display a temperature reading over the Internet. Sure, a general purpose PC could probably be rigged to do this, but I had some parts laying around so I decided to build something.

The project uses the Rabbit Semiconductor RCM2200 module as it’s core. The RCM2200 is connected to a Maxim DS1620 digital thermometer.

Total time to breadboard and write software was about 1.5 hours. Time to etch and assemble the PC-board was about another 1.5 hours. Here’s a picture of the completed project:

The RCM2200 is the greenish module in the upper right corner. It has a built in ethernet jack, CPU, flash memory, etc. To the left of the RCM2200 is the DS1620. Below the DS1620 is a 7805 5V voltage regulator. The only problem with the layout is at high input voltages, the regulator produces a great deal of heat, which could effect the reading of the DS1620. I use an input voltage of 7.5V, which does not cause any problems.

Below is a schematic of the circuit:

There’s a multitude of jumpers (RESET, INPUT1, INPUT2, VBATSEL, OUT2, and VOUT) that are purely optional.

Looking for something?

Use the form below to search the site:

Still not finding what you're looking for? Drop a comment on a post or contact us so we can take care of it!

New Kickstarter Project!

Interested in Nixie Tube projects? Check out my new Nixie Tube Calculator project on Kickstarter.

Copyright Notice

All content on this website is copyright Scott M. Baker and may not be used or reprinted without explicit permission.

Violators will be eaten by a grue.