USB Thermometer


Senior Member
Hello all.
It's a small project that connects to the USB port for serial comm and power and displays the temperature in a windows application.

The circuit uses a 08m chip with a DS18B20 digital 1-wire thermometer. The connection to the usb is done through a USB to TTL cable bought from eBay. The temperature can be displayed either using a simple serial port comm program or by using a small Liberty Basic application I wrote.

Schematics, PCB circuit, source codes are all available here:


New Member
Hi any chance of the copy of the program for the USB adaptor? I'm using the new usb to pic program cable and my new laptop does not support serial in.