I just noticed something in Sebastian’s version; there’s a 1k series resistor, R39, between the output of BUFFER1F and the pulse output jack. This appears to have been added in this version and isn’t present in Ben’s. However, this resistor is upstream of jacks board R1 and the LED, which creates a voltage divider. Its effect will depend on the LED and it maybe doesn’t matter much: I guess the BUFFER1F output level is about 9 V in which case a quick sim shows it being reduced to 7 V by the voltage divider, and as long as it’s above ~5 V it’s probably fine. But in principle the series resistor should be downstream of the connection to the LED and its resistor.
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