Technical > Wiring & Sensors

rev counter input?

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MWfire:
p259 ch0 has pull up resistors on most board. So you can use p259 ch0 without adding resistor.

Tony C:
not sure regarding my board,
wonder if Rob or Dave would know,
how can i tell if ones fitted?

CH0 thats pin4 on the ec36 yeah?
as used by the cooling fan if used,
im not using the fan on mine so can use this instead of CH1 what the tacho is on now,

MWfire:
you can measurement voltage on that pin. 12V when is disable, 0V enabled.

Tony C:
cheers mate will do that tomorrow,
i gather thats with tach output enabled and disabled on ch0?
if i get the readings you posted does that mean i have the pull up resistor fitted?

MWfire:

--- Quote from: Tony C on November 02, 2009, 05:01:25 am ---cheers mate will do that tomorrow,
i gather thats with tach output enabled and disabled on ch0?
if i get the readings you posted does that mean i have the pull up resistor fitted?

--- End quote ---
for test you can use water pump output. Put 100C and if you have 12V then you have pullup resistor.

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