Cressall’s iPhone/iPad app
Cressall’s new power calculator is based on Ohm’s law and Joule’s power law and describes the relation between the following electrical entities
The power calculator is based on Ohm’s law (Voltage = Current x Resistance) and Joule’s power law (Power = Voltage x Current). This application allows you to continually lock one parameter and input another, enabling rapid "what-if" recalculation.
Use the keypad to enter a value then tap on the parameter you want to set. It is now fixed, as shown by the padlock symbol. Enter another parameter and the remaining two are calculated. The most recently entered parameter becomes the new fixed one. You can alter which parameter is fixed by dragging the padlock to it.