Thread: Discussion DragonOSD+V2 with RTH
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Old Apr 30, 2010, 12:14 PM
Daniel Wee is offline
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Peter,

The impedance isn't the issue. I have a zener on the line clamping it down to 3.3V. That's what's causing the voltage to drop. If you want to avoid that - you can insert a series resistor to reduce the draw-down effect.

Edit: RacerX reminded me that if this was causing a problem for you, a unity-gain non-inverting op-amp buffer (see earlier posts on this) would solve the problem.

Daniel
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Last edited by Daniel Wee; Apr 30, 2010 at 03:42 PM.
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