A digital multimeter (DMM) is one of the most useful tools for any electronics or robotics enthusiast; with this kit, you can build your own!
This pocket-sized model measures voltage, current, resistance, and more. The meter runs off of an included 9-volt battery; two test leads and solder are also included. Note that this is an updated model (the previous version was model M-1007K).
This kit requires soldering, but the main integrated circuit is pre-mounted on the printed circuit board. The assembly is therefore quite straightforward, requiring just a soldering iron, diagonal cutters, and a screwdriver. The instructions explain theory of operation and include troubleshooting tips.
Note: The Elenco multimeter is a kit; assembly is required. This kit requires soldering.