Here are BASIC-52 projects and some Atmel AVR projects.and audio projects like Balanced microphone preamp with phantom power. It also has the old PIC Archive.
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.
I fixed a China Torch with New LEDs and a Diode, it failed probably on a drop shock, the battery wire cut … then when put on charge Few LEDs went bad, as battery was absent in ckt.
This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network. This design differs from the popular Version 1.1a in that it has more than twice the resolution. - David W. Bray
1-Wire Barometer - 5/10 Volt Design
"The circuit requires an additional power source other than that of the 1-Wire network. The MPX4115 requires about 7 ma of current. This is more than a 1-Wire network can provide without an elaborate circuit to store parasitic power from the 1-Wire network for short burst of current for pressure measurements."
Amateur radio homepage by Lars Petersen of Holstebro, Denmark. The Useful Articles include some good rules for the QRPer and Main HF rig and antenna.
Lars Petersen OZ1BXM QRP Denmark
CW, QRP, and satellites. Satellite radios and PIC experiments like the one below. The K3 testboard for 16F873