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Old 22nd Sep 2019, 2:27 pm   #15
TonyDuell
Dekatron
 
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,188
Default Re: Homebrew Analogue Computer

Indeed. Differentiators are almost never used in analogue computing as they tend to be badly behaved. It's normal to re-write the differential equation in integral form and use that (look at the 'damped simple harmonic motion' solution on an analogue computer, it uses 2 integrators for all the equation taught in most physics courses is a second order differential equation).

I must try that lunar lander on my EAI1000. I think it has all the necessary elements although I would have to link up a couple of meters and some LEDs.

Talking of 'lunar lander', am I the only one here to have played the (digital, or is it Digital) version on a GT40 (A 1970s graphics terminal with a PDP11/05 CPU inside)? I never managed to get to the McDonalds on the moon, although a friend did (running on my GT40).
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