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Cressall Resistors launches Ohm’'s Law for iPhone app

Wed, 04/10/2013 - 18:36 -- Editor

UK load bank specialist Cressall Resistors has launched an iPhone app for solving Ohm’s Law.

Ohm’s Law is the essential mathematical model that engineers use for mentally mapping out electrical circuits. The brainchild of Peter Duncan, who retired as managing director of Cressall Resistors at the end of 2012, the iPhone app originated as a routine for solving Ohm’s Law on his handheld Hewlett Packard programmable scientific calculator.

The app allows electrical engineers to input any two of the key variables of volts, amps, ohms and power, and calculates the other two.  Once the first calculation is solved, an engineer can then change the value of any of the resulting variables, and the app will back-solve all the other variables automatically.

Chris Johnson, business systems manager of Cressall Resistors, said: “There are several Ohm’s Law calculators in the Apple app store at the moment but they clear their data after each operation and you’re forced to recalculate every time.

“With our app you can change any parameter value and keep playing around with it until you come to a satisfactory solution. If you’re in any doubt about what you’re doing, you can call up a power triangle diagram.

“The Android version is in development now and being ported over. We will extend the language options available too, in partnership with our international agents who have volunteered to give us translations for their home markets. We are expecting to launch German, French and Swedish versions soon.”

Johnson said the next release will be is a star-delta calculator for three-phase electric motors, with more ideas over the horizon. Every revision and new language will be offered free as an upgrade.