Frequency Division using Flip-flops
If the ECU wants pulses of constant length, then a circuit with a 555 might be useful as a last step.
Quote:
Yep, check engine light will come on during deceleration.
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It's always a pity when the ultra simple solution doesn't work.
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2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)