Subpage of Outputs menu


Tachometer / Boostgauge

Tachometer
You can drive a tachometer with any of the outputs, if you need a positive voltage pulse you can either use the S259 which is a push-pull chip or you can use an external pull-up resistor to +12 V.
Frequency calibration: adjustable with the divider setting (default=16: 1 pulse per spark event). 1-5 divider value is special (since 1.1.78): set 1/32, 2/32, 3/32, 4/32 or 5/32 output duty with 1-5 divider setting, useful when the tacho gauge does not like 50% duty like in some Nissan, edis4 Ford Cosworth, etc... (Note1: the freq is 1 pulse / spark, same as with divider=16. Note2: the tach output can be inverted for 100-X duty if needed).

Boost Gauge Settings
For the Audi S2/4x (what year? models?) gauge. Known good default settings are unknown.