Here’s schematic for my Cloud Base Altitude Meter:


Bill of Materials

Part Manufacturer Cost
Arduino Pro Mini SparkFun $9.95
SHT15 Humidity and Temperature Sensor Sensirion / SparkFun $41.95
16×2 Character LCD SparkFun $15.95
Trimpot 10K Generic $0.95
Power Switch Pololu $6.95
Push Button Generic $0.50
“N” battery holder Radioshack $1.49
A23 battery Golden Power $3.99
ProtoBoard SparkFun $9.95
Project case SparkFun $9.95
TOTAL $101.63

Source code

Click on this link to get Arduino source code: Source Code – Cloud Base Altitude Meter