CPEM2024 : Conference on Precision Electromagnetic Measurements
Published: April 30, 2024, 4:02 a.m.

World-wide famous electromagnetic conference is back, starts in July 8, 2024 in Denver, Colorado, USA. documents repository is online again
Published: Nov. 10, 2023, 4:42 a.m.

Update about xDevs T&M documentation repository availability and access.

New site section : Part of the week
Published: Aug. 23, 2023, 12:44 a.m.

Site update to cover random and interesting engineering items every week.

Beware possible virus/trojans when ordering PCBs online at ALLPCB
Published: Feb. 24, 2023, 6:12 a.m.

Beware the possible risks with low-cost outsource PCB fabs

International Metrology Conference - CPEM 2022
Published: Dec. 5, 2022, 9:37 p.m.

World-wide famous electromagnetic conference CPEM 2022 is due, starts from December 12, 2022, directly broadcasting from New Zealand.

Nanovolt grade hardware, update from 2022
Published: Oct. 20, 2022, 5:32 a.m.

A brief introduction to year 2022-2023 copper hardware interconnects for sensitive measurements.

Fluke released new 5540A/5550A/5560A MFC for mainstream calibration applications
Published: Sept. 28, 2022, 11:35 p.m.

New refresh of existing 55XX series calibrators to service 4.5 to 6.5 digits DMM workloads.

Comment section in articles is no more on
Published: March 31, 2021, 4:32 a.m.

Update on why there are no more comment sections on xDevs articles.

Frozen dihydrogen monoxide event photoset
Published: Feb. 7, 2021, 7:19 p.m.

Snowfall 2021 photography

Group-buy for nanovolt grade hardware
Published: April 15, 2019, 9:15 a.m.

Nanovolt-accurate interconnects group-buy call.

xDevs Lab experiments going live 24 hour / 7 days
Published: Dec. 7, 2018, 9:32 p.m.

Camera footage available at link.

Question to our readers about the articles
Published: Sept. 22, 2018, 10:55 a.m.

Do you want to see more frequent publications including less in-depth projects, or focus detailed projects instead?

xDevs labs photodairy : Day 2
Published: Aug. 14, 2018, 9:03 p.m.

Short photo-notes of August 15, 2018 lab works on calibrator and 8.5-digit Fluke DMM.

xDevs labs photodairy : Day 1
Published: Aug. 14, 2018, 3:53 p.m.

Short photo-notes of August 14, 2018 lab works.

More ultra-stable resistors arrived for our collection
Published: July 15, 2018, 6:15 p.m.

Fresh acquisition of 16pcs custom VPG 1.000 Ohm resistors in TO-3 hermetic package.

Project to restore 5720A chassis started
Published: July 13, 2018, 5:29 p.m. attempts to restore complete Fluke 5720A calibrator.

Random lab photos
Published: May 15, 2018, 10:57 a.m.

Photo of Keithley 2400 front panel replacement plastic.

New lot of precision resistors to tempco test project and DIY cables
Published: March 8, 2018, 5:25 p.m. builds some PTFE-insulated kelvin-type cables for precision resistance measurement and tests Caddock 5ppm/K spec resistors.

New resistors arrival from eBay for tempco tests
Published: Jan. 25, 2018, 3:55 p.m.

Addition to resistor test database.

Parts arrivals for projects in 2018
Published: Jan. 7, 2018, 3 p.m.

Photos of components received in January’18 for projects.

Happy 2018 and project summary over the year.
Published: Jan. 1, 2018, 6:26 p.m.

Overall summary of progress in 2017.

Happy 2017 Year and annual summary of projects
Published: Dec. 28, 2016, 2:48 a.m.

Progress update on our projects and ideas

DCV calibration program for DIY volt-nuts with our KX LTZ1000 module
Published: Nov. 13, 2016, 2:55 p.m.

Free ppm-level DCV calibration program for owners of KX voltage reference module.

Released guide for using Agilent/Keysight 82357B with linux-gpib on RPI
Published: Sept. 6, 2016, 2:08 a.m.

Detailed guide how to configure and use HP_Agilent_Keysight 82357A and 82357B GPIB adapter with Raspberry Pi is now released.

Reader contribution: Datron 4800 MFC PCB photos
Published: June 16, 2016, 4:40 a.m.

Addition to Datron 4800 information collection, PCB photographs from site reader

Coming back to single language on and reason for it
Published: May 30, 2016, 3:50 p.m.

Decision was made to revert public site engine for English-only content.

Advantest R3131 SA manuals and photos added
Published: May 8, 2016, 11:59 a.m.

User contribution: Advantest R3131

New video : making triaxial cables
Published: April 25, 2016, 5:13 p.m. builds pair of triaxial low-noise cables on video. Start to finish.

New article and first instrument from Agilent
Published: April 3, 2016, 5:21 p.m.

New publication and teardown of big Agilent SMU mainframe.

Site is back online
Published: March 13, 2016, 2:18 a.m.

After temporary connection outage March.8-March.12 side is back online now.

Possible site connection issues 8.March-11.March 2016
Published: March 8, 2016, 1:12 a.m.

Possible for site connection issues, due to ISP system update and DNS changes.

First part of Texas Instruments ADS1262 32-bit ADC review published
Published: Jan. 30, 2016, 7:14 a.m.

TI ADS1262 EVM review article for Element14’s Roadtest program is now online.

Happy New Year! Progress summary for 2015
Published: Dec. 30, 2015, 8:22 a.m.

Summary and our progress during year 2015, and some future plans. Happy New 2016!

XMAS time for precision project at
Published: Dec. 21, 2015, 4:55 p.m.

Perhaps you wonder how Xmas looking for volt-nuts? Well, happy X-mas here, got some happy aged LTZ1000, LM399 and resistors to play with. Read in.

Two new articles, Neutron ATE and L&N decade review
Published: Dec. 16, 2015, 5:08 p.m.

Two articles published, our own PSU ATE unit project, Neutron and L&N 4754 resistor decade review KX LTZ1000/LM399-based reference article online
Published: Dec. 9, 2015, 8:34 a.m.

Article about our own ultra-stable LTZ1000/LM399 voltage reference is published. Check it out.

New article covering HP 3245 Universal source
Published: Nov. 4, 2015, 8:02 a.m.

HP3245A Article added, with detailed repair procedure, boards overview and benchmarking.

New repair article - HP 3456A DMM worklog.
Published: Oct. 29, 2015, 8:45 a.m.

Detailed article from TEKTRON is ready. Enjoy repair and modifications progress.

Repair progress update on HP 3458A
Published: Oct. 11, 2015, 10:19 a.m.

Digital domain and DC PCBA are fixed. Was working and passed selftest, but failed after a day of use.

HP 3458A first test assembly with new parts
Published: Oct. 4, 2015, 2:18 p.m.

Tomorrow will be first assembly with replaced parts and power on analog side. Full worklog

HP 3458A - Repair update, cleaning chassis
Published: Sept. 28, 2015, 12:40 p.m.

Cleaning rusty steel chassis frame of precision DMM HP 3458A. Article draft available here

Keithley Model 182-M sensitive voltmeter reviewed.
Published: Sept. 25, 2015, 9:14 a.m.

Added new nano-voltmeter Keithley Model 182-M review and teardown. Useful tool for low-voltage measurements and noise analysis.

Added new article about usage of NI USB-GPIB-HS with Raspberry Pi
Published: Aug. 15, 2015, 6:42 p.m.

New step-by-step guide added, covering National Instruments GPIB-USB-HS interfacing on RaspberryPi.

Added new calculator for noise density En math.
Published: Aug. 3, 2015, 4:05 p.m.

Added simple online interactive calculator to convert noise density figure to specific frequency band AC RMS noise voltage.

Received replacement switch Keithley SW-468
Published: July 22, 2015, 5:12 p.m.

Keithley SW-468 switch for Model 2000 repair project received.

Added comment engine to website articles and service pages
Published: July 3, 2015, 6:05 p.m.

Added feedback comment system to articles for user input and comments. Now you can follow us on Disqus

Server migration - services might be temporary unavailable
Published: May 18, 2015, 2:51 p.m.

Server migrate to much bigger storage and faster system during this week. Sorry for possible downtime, we will be back online soon. Maintenance finish estimate at 25 May.

Repairing Keithley Model 2001
Published: April 7, 2015, 7:17 p.m.

Published article about repairing Keithley 2001 7.5 digit multimeter

Uploaded Keithley 2001 B06 and 2400 C10 firmwares
Published: March 25, 2015, 3:22 a.m.

Added firmware binaries for Keithley Model 2001 (Ver.B06) and Model 2400. Thanks for contributors.

Django+Python developer wanted
Published: Jan. 29, 2015, 4:33 a.m. looking for Django + Python developer to work on website development. Those who interested, please contact “skype:tin_topmods”:skype:tin_topmods?call

Articles are split into sections per type
Published: Sept. 17, 2014, 9:53 p.m.

Articles are split per type into guides, repair worklogs, reviews of production gear and general articles. Division is set to aid easy navigation and resource search.