Hipster Logic has released an iPhone electronics reference app, called, well… Electrical Ref. From their iTunes description:

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.

The app costs a buck.

Electrical Ref

Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy person’s memoir,” called Borg Like Me.

  • Garrett

    I’d be REALLY impressed if it used the camera to identify resistors and overlay their values in live view.

    • Ookseer

      I thought about hacking together an app that does just that, but my 2nd Gen iPhone’s camera just can’t handle taking a photo close enough for it to work. Heck, it can rarely make QR codes work, and they’re just black & white.

      I know the 3gs can take better macro photos, but I’m not sure if it’s yet good enough for this application.

  • David

    It can’t be serious, a buck for an app that can be easily replaced by some easy thinking.

  • Jeremy Brooks

    I use these apps:

    LED Resist

  • James

    I got myself Electronics Toolkit and iTronixpal. The first one is free, and the latter cost a buck, but very nice looking.