xDevs.com is dedicated to sharing electronics engineering, digital and analog circuit design, metrology, and calibration study, PCB layout, FPGA applications and firmware development for embedded systems and devices.

All data presented here is free for grabs and use, without any warranties. There is no login, registration, email forms or anything else needed to view publications and referenced files. We believe that information and research shall be shared and reproduced by different teams to ensure future scientific progress. Only requirement is to preserve links and references to original author and source. This way you support our efforts to keep everything online and available world-wide.

Have a manual for test equipment gear or interesting project article, which you wish to share for hosting here? Please, follow these upload directions or contact me .

Discussion about any projects and electronics related stuff is welcome in our own IRC chat server: irc.xdevs.com (standard port 6667, channel: #xDevs.com).
Web-interface for access mirrored on this page, however, we recommend to use standalone IRC-client of your preference for the best experience.

Some key reviews, work logs and product design articles

• SI 2019 redefinition – Calibration work with Taiwan ITRI CMS National Metrology Lab
• Study of temperature stability, more than 260 resistors – Methodology and test results of various commercial precision resistors
• DMM noise measurement – public project to measure and compare noise of bench multimeters.
• xDevs.com FX 10.0000V Ultra-stable Voltage reference – second iteration of LTZ1000A-based ultra-stable DC Voltage standard
• xDevs.com KX Ultra-stable Voltage reference – public first generation of LTZ1000A 7V DC voltage standard
• Fluke 5700A calibrator overhaul – Service and minor repairs for high-end Fluke 5700A series calibrator.
• Fluke 792A AC/DC transfer standard repair – Repair of battery block and testing of Fluke 792A metrology AC/DC transfer standard.
• HP/Agilent/Keysight 3458A repair worklogs, Unit 2, Unit 3 – Detailed worklogs covering HP 3458A 8½-digit DMMs repair and upgrades
• Wavetek 4920M AC standard repair – Repair and calibration of Wavetek 4920M AVMS.
• Keysight B2987A electrometer teardown – Brief look on high-performance electrometer design
• Keithley 2002 repair – Extensive repair experience for Keithley Model 2002 8½-digit precision multimeter
• Keithley 2510 repair – Repair and calibration of Keithley Model 2510 TEC SMU
• Keithley 2400 repair – Repair of broken VFD glass and testing Keithley Model 2400 SourceMeter
• HP 3245A Universal source repair – Repair and calibration of rare HP 3245 precision 6½-digit DC/AC signal source
• Development boards – ATMEL AVR, ARM, Altera CPLD and FPGA development opensource hardware kits
• Neutron – Power supply automated test system, 12-channel 2kW DC power rating for electronic load, 2% accuracy
• Toolkit – xDevs.com Electronics engineering toolkit, online calculators, tools and simulation helpers