FWIW I'm using an 800mA supply (required since there are two 95mA Time Machines) to power my 3 fracracks of Blacet/Wiard modules.
doug, et al -
i`m using a blacet ps500 supply and am using it to power : 2 1209b joysticks, time machine, mini-wave, encore u.e.g., motm 410, wogglebug and envelator and haven`t had any problems even after running the system 24x7 for a week.
my comment about the joystick using very little current was based on the fact that it was even suggested as possible and practical to make a handheld unit powered by a 9v battery. given the "complexity" of the circuit, current drain should be very low.
and, for what its worth, they do work nicely !
best,
dave