Multimeter

Basic Multimeter project - A basic multimeter project with full schematic diagram by G3PTO

Build a Test Meter - This article include a circuit that allows a cheap 0-1mA meter to be used as a micro-ammeter or a milli-voltmeter

DIY Multimeter  ^updated - An home made multimeter using a SparkFun multimeter kit, includes a time lapse movies of multimeter kit assembling

Homemade resistance measurement meter - A multimeter with standard resistance sorting function

How to measure current - An article on how to measure electrical current with a digital multimeter or analogue multimeter.

Make your own multimeter - Homebrew a multimeter with this article

Multimeter with Sound Blaster - Sound card based multimeter

Testing transistors and diodes - How test transistors and diodes with a simple digital multimeter.