Parts: Precision humidity and temperature sensor (SHT1x/7x)

posted Dec 29th 2008 10:03am by Ian
filed under: parts, tool hacks

sht11

Sensirion’s SHTxx is a digitally interfaced humidity and temperature sensor. Accurate humidity measurements usually require careful analog design, but the SHTxx moves all that complicated stuff into a single chip. Through-hole (SHT7x) and surface mount (SHT1x) versions are available, we used the surface mount SHT11 with +/-3% accuracy. We’ll show you how to use the SHTxx below.

Read the rest of this entry »

How-to: Read a FedEx Kinko’s smart card (SLE4442)

posted Nov 25th 2008 5:29pm by Ian
filed under: how-to, misc hacks, tool hacks

overview

Our wallets are filling up with SIM and RFID cards that contain hidden information. Using our latest project, the Bus Pirate universal serial interface, we can dump the memory from many common smart cards. In today’s How-to, we show you how to interface common smart cards, and walk you through the data stored on a FedEx Kinko’s prepaid value card.

Read the rest of this entry »




Hack a Day serves up fresh hacks each day, every day from around the web and a special How-To hack each week.

Send us your hacks