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If there's just a 1% chance of you not being able to complete it, because your studies/work/family/whatever was a greater demand, please do not apply.
Actually, I made two variants of the circuit, of which the least precise will still be within 2..3µs and this tolerance is of no consequence, as it is below the dead-band timing of all servos I know of.
If you are specifying 5% Resistors, and you get a 5% low, and a 5% high unit in your project, won't that possibly change the speed of oscillation by up to 10% ?
.0015 X 1.05 = .001575 or .0015 X .95 = .001425 or a worst case error of .00015 between different constructs with worst case high low tolerance component combinations?This is a maximum variance of 150 uSec.
I am curios as to where the 2...3uS precision comes from.
I think your Beta test is fast going the way of the Beta video recorder.
Have an Oreo on me.