Kalle Hyvönen an electronics enthusiast from Finland has made many interesting. In childhood dismantling of all kinds of electronic devices was his main occupation. That is what makes him a Wizard Today.
"Here’s a quick project I made in couple days or so. It is a push-pull step-down laser diode driver based on LT1683 SMPS controller chip from Linear Technology."
Switchmode laser diode driver based on LT1683
"I’ve been thinking about making a temperature logger for my room and my computer, I set on using DS18S20 sensors from Maxim because they’re common, cheap and overally pretty ideal. My computer is so new that it does not have a serial port "
"I also built a humidity sensor to my 1-wire network from a DS2438 chip and a HIH4000 humidity sensor."