Hana heaven

[CageyH]

I am currently running at 800 Ohms, but have read that around 500 seems to be the sweet spot.

[ReggieB]

I might have to get my slide rule out and work out how to set 500 Ohms via the switches on my Dino.

[ReggieB]

I used a bit of ruby code instead:

settings = [1.1, 33.0, 100.0, 1000.0]

(1..4).collect do |i|
  settings.combination(i).each do |combination|
    label = combination.inspect
    fractions = combination.collect{|c| 1/c}
    sum = fractions.inject &:+
    puts "#{label} gives #{1 / sum}"
  end
end

Which gave me all the resistances available by combinations of switches on a Trichord Dino:

[1.1] gives 1.1
[33.0] gives 33.0
[100.0] gives 100.0
[1000.0] gives 1000.0
[1.1, 33.0] gives 1.0645161290322582
[1.1, 100.0] gives 1.0880316518298714
[1.1, 1000.0] gives 1.0987913295375087
[33.0, 100.0] gives 24.81203007518797
[33.0, 1000.0] gives 31.945788964181993
[100.0, 1000.0] gives 90.90909090909092
[1.1, 33.0, 100.0] gives 1.053303542930099
[1.1, 33.0, 1000.0] gives 1.0633841394644412
[1.1, 100.0, 1000.0] gives 1.0868491255804762
[33.0, 100.0, 1000.0] gives 24.21129860601614
[1.1, 33.0, 100.0, 1000.0] gives 1.052195261932851

Looks like I'd have to get the soldering iron out to improve on 1000.0

Update: the calculations are right now. Checked via an on line calculator.