iDVM Turns Your iPhone Into a Multimeter

The iPhone is set to takeover your entire toolbox, and the latest hardware to help its march to total workshop domination is the iDVM, a digital multimeter which uses an iOS devices for its display.
The iDVM creates its own Wi-Fi hotspot to which the iPhone (or iPad) can connect. Thus you can take readings with [...]

Source: http://www.wired.com/gadgetlab/2011/05/idvm-turns-your-iphone-into-a-multimeter/

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