cool encoder decode circuit with debounce

Rick_H

http://electronicdesign.com/article/analog-and-mixed-signal/simple-quadrature-decoder-suits-rotary-encoders214.aspx

gona try this

Phil Pilgrim (PhiPi)

'Interesting. But quadrature encoder outputs don't really need debouncing. The reason is that only one output can be bouncing at a time; and, when this happens, the position interpreter code merely toggles the position back and forth by one count until the bouncing settles. IOW, there is no accumulated error due to the bouncing.

-Phil

Rick_H

I would think you would want to debounce so as not to execute code on a false trigger, but ya I see your point.

erco

That's quite a circuit to build in Figure 2. For a beautiful and ultra-simple optical quad encoder experience, just use two of these $3 units: http://www.junun.org/MarkIII/Info.jsp?item=48 They already have amplifiers, filters, and Schmidt triggers built in. Hardly any external hardware required, use this circuit (figure 4): http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.html

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