Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
bd139:
Fair point. But.... When I was designing the VCO for my SA, which is a varactor controlled colpitts oscillator I used my old Farnell supply set to a random voltage with a 2k 10 turn pot nicked from a parts mule scope across it and a DMM to set it. YMMV of course. Note that the pot was buffered by a simple follower.
Miti:
--- Quote from: PA0PBZ on June 11, 2018, 11:31:48 am ---When I go to the test equipment folder I see: EEVblog Electronics Community Forum » Products » Test Equipment and the buttons are where they should be.
Where do you end up when clicking this: https://www.eevblog.com/forum/testgear/ ?
--- End quote ---
I get where I want to get. I just don't understand why I don't end up in the same page when I click Home > Test Equipment. Anyway, it's all good now, crisis averted.
capt bullshot:
--- Quote from: tautech on June 11, 2018, 10:20:17 pm ---However modern digital PSU's have some decent acceleration logarithms acting on the encoder so are pretty decent to use compared to step by step increments. Others have memory that you set for your commonly used values and jump to them with a couple of key presses.
--- End quote ---
IMO the acceleration is fucking up the usability. Having keys to select the digit, and then doing steps by the encoder is OK since you can select the resolution that way. The encoder of a HPAK 33120 or the more modern 33522 Generator works that way, and I find it quite useful. The encoder of the HPAK 36312 power supply is not useful for me. It always steps the least significant digit and accelerates if you turn if faster - you don't have any control over the resolution. A 10 turn pot is still the best way for me, since it gives you decent resolution and you've got all the control within your fingers in a predictable way. Accelerating encoders are quite inpredictable for my human intuition. Even with the CMU200's encoder, which is high qualtity and gives a pretty good feedback when operating it.
bd139:
Yes. I don’t think I could handle accelerating encoders. That’s mr clippy style helpful. At best digit select and encoder. That allows you to sweep each place value.
This is where the course / fine control comes in. Gives you 100:1 range easily and reproducibly. You learn where the knob is rather than having to do a linear search each time. Not suitable for all situations but for voltage selection it works pretty well.
tautech:
--- Quote from: capt bullshot on June 12, 2018, 07:58:53 am ---
--- Quote from: tautech on June 11, 2018, 10:20:17 pm ---However modern digital PSU's have some decent acceleration logarithms acting on the encoder so are pretty decent to use compared to step by step increments. Others have memory that you set for your commonly used values and jump to them with a couple of key presses.
--- End quote ---
IMO the acceleration is fucking up the usability. Having keys to select the digit, and then doing steps by the encoder is OK since you can select the resolution that way. The encoder of a HPAK 33120 or the more modern 33522 Generator works that way, and I find it quite useful. The encoder of the HPAK 36312 power supply is not useful for me. It always steps the least significant digit and accelerates if you turn if faster - you don't have any control over the resolution. A 10 turn pot is still the best way for me, since it gives you decent resolution and you've got all the control within your fingers in a predictable way. Accelerating encoders are quite inpredictable for my human intuition. Even with the CMU200's encoder, which is high qualtity and gives a pretty good feedback when operating it.
--- End quote ---
Do you have the means to select just which digit to adjust with the encoder and then that digit is highlighted while selected ?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version