Author Topic: #196 (recast 01-08-22) An Interview with Mike Engelhardt (LTspice) + bonus  (Read 599 times)

0 Members and 1 Guest are viewing this topic.

Offline 3roomlab

  • Frequent Contributor
  • **
  • Posts: 823
  • Country: 00
  • I have spectral radiance of 11.4011 W/m^2/sr/µm




6 episode video : Mike Engelhardt on LTspice
I have a radiant emittance of 508.958 W/m^2 ... whats yours ?
 
The following users thanked this post: Ed.Kloonk, RoGeorge

Offline 3roomlab

  • Frequent Contributor
  • **
  • Posts: 823
  • Country: 00
  • I have spectral radiance of 11.4011 W/m^2/sr/µm
#196 (LTspice) Nlog / Plog LOG potentiometer in LTspice
« Reply #1 on: September 21, 2022, 10:38:47 pm »
The below is not part of the video above
But I leave it here for reference

By chance I was fiddling with these and figured out how it works

4 parameters are required
Rtot = total potentiometer R
Wiper = 0.01 to 0.99 relative position of wiper
Rtap = "curvature" of log curve
Tap = 1 for Nlog / 0.01 for Plog
(I editted the symbol roughly)
run a test [op] sim and we get this
(rename *txt to *lib)

edit : to note are the pin assignment which will make cw/ccw turning relevant
In Plog 1 = cw 2 =ccw
In Nlog 1 = cw 2 =ccw

We get a log pot and a reverse log pot (useful for audio sims)
« Last Edit: September 22, 2022, 05:44:26 am by 3roomlab »
I have a radiant emittance of 508.958 W/m^2 ... whats yours ?
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf