Some insight from my friend Wim
On 12.24.97 Wim Verheyen <catwim@skynet.be> wrote: >For the joystick : you can eventually do this without the DPST switches. >Simply connect +5V to one end of the attenuator pots and -5V to the other >end. Then in the middle position of the pot, you have 0V and going one >way or the other, you get increasing positive or negative range. This is another way of doing it. However, for live performances, I personally prefer to have the +/-switch...For example, if you have selected the range of the potemtiometer as being +1V, you can quickly toggle the switch to -1V without having to recalibrate the pot... >I would also make the joystick pots 50 K lin, in order to make the range >of the attenuator pots more predictable (a load of 10 K on the wiper of >the attenuator pot will make its behaviour far from linear). Good suggestion: a 50Klin pot is a better choice... >And with 50 k pots, you better use a voltage follower after the OutXx. >Making the attenuator pots a smaller value is not advisable, since they >will get too much current, get hot and die soon. >----------------------------------------------------------------- > Wim Verheyen, Hasselt, Belgium, catwim@skynet.be > The Aemit modular analog home, The Kurzweil K2000/K2500 Atomium > http://users.skynet.be/catwim/wim.html ----------------------------------------------------------------- Thanks Wim!
