[sdiy] TB303 Slide

Tim Stinchcombe tim102 at timstinchcombe.co.uk
Fri Jun 8 17:56:34 CEST 2012

> How would it know that it came from 0 V and not 1 V?

Because the initial step was *two* volts and not one, and it has been
charging for 15ms, starting from 0V.

> No, they both follow the same curve from 1 V on - the 
> exponential curve of the RC time constant in question. :-)

Here is simulation output of the two curves:


As noted before, at any given time the gradient of the 1-2 curve (red) is
always less than (actually half) that of the 0-2 curve (green) - you simply
cannot 'drop' one on top of the other!!!

Tim Stinchcombe 

Cheltenham, Glos, UK
email: tim102 at timstinchcombe.co.uk

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