View Full Version : Clay's Cal question of the day: Selectable boost

02-23-2008, 12:41 PM
How do you make the switchable / selectable boost work?

I guess this is a two part question.

I. With Rob's 'turbonator' cal, it has the option of selectable boost. To make this functional, is all you have to do is check the box in dcal or chem? Im guessing this is yes.

II. Once it is functional..... how to you activate it? ie apply voltage to a pin on the LM? ground out a pin in the LM? something else?


02-23-2008, 01:05 PM
There's a constant down near the boost tables that allows you to select which input to the LM to use for the boost switch. There's also a constant to change the polarity since some switches may be normally open and some normally closed.

There's a constant for the 'lo' setting, and the normal tables for the hi-setting. The boost lookup always uses the lowest of all the boost settings. The way the switchable setup works is, the 'low' constant is ignored when the switch is set to the 'hi' position.

02-23-2008, 01:29 PM
yup, as per usual, I just needed to look a bit harder. ;)

Thanks rob!