Ian Scott Johnston
@ianscottjohnston.bsky.social
YouTuber - Electronic Test Instrument repair
WinGPIB updated.
3245A Universal source calibration - I have added the Keysight 34461A/34465A/34470A and Advantest/ADCMT R6581/R6581T DMM's able to be used for 3245A cal. Previously it was 3458A only.
Also, control over DMM NPLC and have set 344XXA Input Z to Auto.
www.eevblog.com/forum/metrol...
3245A Universal source calibration - I have added the Keysight 34461A/34465A/34470A and Advantest/ADCMT R6581/R6581T DMM's able to be used for 3245A cal. Previously it was 3458A only.
Also, control over DMM NPLC and have set 344XXA Input Z to Auto.
www.eevblog.com/forum/metrol...
June 24, 2025 at 12:23 PM
WinGPIB updated.
3245A Universal source calibration - I have added the Keysight 34461A/34465A/34470A and Advantest/ADCMT R6581/R6581T DMM's able to be used for 3245A cal. Previously it was 3458A only.
Also, control over DMM NPLC and have set 344XXA Input Z to Auto.
www.eevblog.com/forum/metrol...
3245A Universal source calibration - I have added the Keysight 34461A/34465A/34470A and Advantest/ADCMT R6581/R6581T DMM's able to be used for 3245A cal. Previously it was 3458A only.
Also, control over DMM NPLC and have set 344XXA Input Z to Auto.
www.eevblog.com/forum/metrol...
On the workbench for repair, a Meratronik V560, a Polish multimeter dating from around 1984.
January 29, 2025 at 2:01 PM
On the workbench for repair, a Meratronik V560, a Polish multimeter dating from around 1984.
BuyDisplay 320x960 TFT LCD, here's tech info you get.
Why one doc say 400 and other 320.
Actually a 400 width TFT missing glass compared to actual 400 to make 320.
AdaFruit website "the internal memory is set up as 400x960 but the leftmost 80 pixels are considered overscan and don't show up".
Why one doc say 400 and other 320.
Actually a 400 width TFT missing glass compared to actual 400 to make 320.
AdaFruit website "the internal memory is set up as 400x960 but the leftmost 80 pixels are considered overscan and don't show up".
January 21, 2025 at 12:20 PM
BuyDisplay 320x960 TFT LCD, here's tech info you get.
Why one doc say 400 and other 320.
Actually a 400 width TFT missing glass compared to actual 400 to make 320.
AdaFruit website "the internal memory is set up as 400x960 but the leftmost 80 pixels are considered overscan and don't show up".
Why one doc say 400 and other 320.
Actually a 400 width TFT missing glass compared to actual 400 to make 320.
AdaFruit website "the internal memory is set up as 400x960 but the leftmost 80 pixels are considered overscan and don't show up".
One of the comments on my latest YT video (R6581T DMM TFT LCD upgrade to worn out unobtanium VFD).
You have to laugh!!!
You have to laugh!!!
December 19, 2024 at 10:37 AM
One of the comments on my latest YT video (R6581T DMM TFT LCD upgrade to worn out unobtanium VFD).
You have to laugh!!!
You have to laugh!!!
My latest project!
youtu.be/rv6x6VsWyRo
youtu.be/rv6x6VsWyRo
No.148 - Advantest R6581T DMM Upgrade to TFT LCD
YouTube video by IanScottJohnston
youtu.be
December 17, 2024 at 3:23 PM
My latest project!
youtu.be/rv6x6VsWyRo
youtu.be/rv6x6VsWyRo
Sadly Advantest will not supply VFD's for the R6581 DMM.
Falling like flies, VFD's go dim after just a few years.
Reversed engineered (MickleT) and my own hi-res TFT LCD.
Ppen-source, free for others to retrofit to their own R6581's.
eevblog.com/forum/repair...
github.com/Ian-Johnston...
Falling like flies, VFD's go dim after just a few years.
Reversed engineered (MickleT) and my own hi-res TFT LCD.
Ppen-source, free for others to retrofit to their own R6581's.
eevblog.com/forum/repair...
github.com/Ian-Johnston...
December 7, 2024 at 8:54 PM
Sadly Advantest will not supply VFD's for the R6581 DMM.
Falling like flies, VFD's go dim after just a few years.
Reversed engineered (MickleT) and my own hi-res TFT LCD.
Ppen-source, free for others to retrofit to their own R6581's.
eevblog.com/forum/repair...
github.com/Ian-Johnston...
Falling like flies, VFD's go dim after just a few years.
Reversed engineered (MickleT) and my own hi-res TFT LCD.
Ppen-source, free for others to retrofit to their own R6581's.
eevblog.com/forum/repair...
github.com/Ian-Johnston...
YouTube video in the works - Working Fluke 45 DMM on the workbench for some modifications!
November 20, 2024 at 2:35 PM
YouTube video in the works - Working Fluke 45 DMM on the workbench for some modifications!
I bought this R6581T with a very dim, verging unusable VFD (display).....time to change it out for an OLED.
youtu.be/QyP6tK9EIsg
youtu.be/QyP6tK9EIsg
No.144 - Advantest R6581T 8.5digit DMM Display Upgrade to OLED
YouTube video by IanScottJohnston
youtu.be
October 27, 2024 at 2:27 PM
I bought this R6581T with a very dim, verging unusable VFD (display).....time to change it out for an OLED.
youtu.be/QyP6tK9EIsg
youtu.be/QyP6tK9EIsg