Well tonight I added an interface lead from the spare contacts on the integrator switch to the plotter. This allows the plotter sweep to be started when the TR-10 is switched out of "Reset" mode.
Wired up the TR-10 to produce sine and cosine by solving
dx/dt = y
dy/dt = -x
which have the solutions "sine(t)" and cosine(t)". These can be plotted against time to produce a sine wave, or against each other in x/y mode to
OK well I now have an old Pen Plotter , analogue of course attached to my TR-10. I was going to post a short video of it plotting negative exponential... But it says its too big, so here is a photo of the output.
OK Uploaded video to YouTube
So you can watch...