docs

overview/wbo/cj125_heating_4_9.md

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+![img](cj125_heating_4_9.png)
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+Wideband controller based on Bosch CJ125 chip
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+green is vUr, temperature feedback
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+red is duty cycle
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+yellow is vUa, the lambda current measurement
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+white is converted AFR
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+fully operating in <30 seconds
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+in to closed loop in ~18 seconds
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+P=30
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+I=5
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+D=0.3
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+though you could probably use D=0 since the system is already damped so hard
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+50Hz