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rusefi / hw_microRusEfi

microRusEfi board for rusEfi ECU
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[0.4.7] VRef drama continues #127

Closed rusefi closed 4 years ago

rusefi commented 4 years ago

JP1 to vref with 6.8K/10K divider is not happy :( vref point measures 2.48 not expected 2.99

@mck1117 says "0.5v thru a 6.8k resistor is 75uA

Typical draw on vref during ADC conversion is 300uA"

rusefi commented 4 years ago

0.4.7 has a minor mistake that the wrong side of that jumper is the default

it should be cut & soldered/jumpered to the "vdda" side

image

rusefi commented 4 years ago

@mck1117 says "I'd just toss it Just tie vref to avdd, no jumper"

jharvey commented 4 years ago

This is obsolete, suggest closing this issue