Electric OU: Opto Isolator for the Function Generator TarBaby Gate Drive

Here I try to explain the optoisolator idea I had to isolate the function generator’s current path from the main power circuit of the Tar Baby. It works well for that purpose, but at this first pass at the system I seem to have misplaced the magic oscillations…,(oscillations, oscillations, electronic evocations of sound’s reality……..) Now, there is an error when I talk about the load resistor. It is actually 5 x 50 Ohm, 12 Watt, ceramic tube wirewound resistors in parallel, for a resistance of 10.3 Ohms and power handling rating of 60 Watts… not 250 like I said in the video. Also… I Do understand the last part now where the mosfet(s) stay fully on. It means that the offset of the FG is set so far out that the corresponding LED or optoisolator is never allowed to turn “off” because its input signal, although pulsing, doesn’t drop LOW enough. Hence the mosfet driven by that signal stays ON and the common drain stays LOW even though the FG is pulsing along merrily. In this mode you get maximum power from the battery to the load… because it’s always on. I’m beginning to think that other experimenters with this circuit have simply been fooling themselves all along, trying to _prove_ a theory instead of trying to _disprove_ it. When “tuning”, trying to get the oscillations, I frequently go through areas where the mosfets are totally on or switching cleanly without the oscillations. It is during these times that MY load gets the most power and heats up the most. But

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