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@guod thanks for your response. So if I understood you correctly, you mean to say that when the transistor is turned on we are applying 0V to the input rather than shorting it, so in other words physically connecting DIM+ and DIM- has a different affect on the internal dimming circuitry than...

Hello everyone, I have a question related to the circuit posted by Guod. I have read that it is not safe to short both the DIM+ and DIM- terminals. If this is the case then lets take Guod's circuit and say the transistor is on, in that case the terminals DIM+ and DIM- are effectively shorted...