Cheapo Ebay (China) Temperature/Humidity Displays

Thread Starter

ErnieM

Joined Apr 24, 2011
8,123
I'm looking at these el-cheapo temperaturer and humidity displays from EBay. They seem to come in °C and °F varieties.

I am wondering if there is a switch/jumper/land to cut to change the scale between F and C.

Has anyone played with these before?therms.jpg
 

Thread Starter

ErnieM

Joined Apr 24, 2011
8,123
So I went ahead and bought some of these and tore down an extra one. Inside is a single sided PCB with a blob top IC. Part of the blob was covering two pads marked F° or such indicating it is the control connection for F or C. I bought F's so if you want to change best get a C so you can remove the jumper.

However, you need to be expert at realigning zebra strips to get the LCD to work once more.

tl;dr: just buy the scale you want.
 
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