Have you ever wondered how many Ohms that resistor your holding is? Maybe wondered what the capacitance is of a ceramic disc capacitor with the code 103? Forgotten how to assemble a 555 timer circuit? Or wondered how to make your Arduino detect an EMF? Then Electrical Ref is the app for you. It features a resistor calculator, capacitor calculator, & circuit diagrams.Here's a link to iTunes if you'd like to pick up this DIY Electrical helper for $1. Via Makezine.com iPhone photo from Johan Larsson at Flickr with a Creative Commons license.