EEVblog

By David L. JonesTechnology Education

EEVblog episodes

May 11, 2025 EEVblog 1684 – Awesome Logging Software: Test Controller
Test Controller is an awesome free logging and control software that supports a ton of multimeters, power supplies and loads, including the new BM2257.
https://lygte-info.dk/project/TestControllerIntro%20UK.html
https://lygte-info.dk
Forum: https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/
0 min
May 08, 2025 EEVblog 1683 – Sun-Ways Solar Freakin RAILways – Part 2
Sun-Ways actually went ahead and installed Solar Freakin’ RAILways in the Swiss village of Buttes at the cost of US$700,000 !
References:
https://www.swissinfo.ch/eng/climate-change/switzerland-turns-train-tracks-into-solar-power-plants/89227914
https://www.swissinfo.ch/eng/science/swiss-solar-railway-project-gets-back-on-track/87707181
https://www.startupticker.ch/en/news/sun-ways-opens-world-s-first-rail-ready-track-mounted-solar-power-plant
https://www.youtube.com/@sun-ways
https://www.pv-magazine.com/2024/04/09/italian-startup-testing-pv-sleepers-on-railway-line/
https://pvwatts.nrel.gov/pvwatts.php
Paper on railway dust:
https://www.sciencedirect.com/science/article/pii/S004896971401451X?via%3Dihub
https://pubmed.ncbi.nlm.nih.gov/25461038/
Forum: https://www.eevblog.com/forum/blog/eevblog-1683-sun-ways-solar-freakin-railways-part-2/
Part 1: https://www.youtube.com/watch?v=7vItnxhWRqw
34 min
April 30, 2025 EEVblog 1682 – Enphase Microinverter FAIL & Warranty Install
One of my 14 Enphase microinverters failed and they sent me a new one under warranty, lets install it…
Forum: https://www.eevblog.com/forum/blog/eevblog-1682-enphase-microinverter-fail-warranty-install/
14 min
April 26, 2025 EEVblog 1681 – Mailbag: Nice DIY CC Load, Amazing Proto Boards, Ian Johnston
More mailbag!
00:00 – A really really nice DIY Constant Current Load
07:55 – Whatever happened to sloped folded metal instrument cases?
08:46 – The amazing Stamp Breadboard Replacement prototype boards (Link coming soon)
13:35 – A look at the Stamp documentation
21:14 – Ian Scott Johnston’s Multimeter Continuity Speed Tester!
https://www.youtube.com/@UCtiK8QrcCrsjDXpKzB1PO1A
https://www.ianjohnston.com/
Forum: https://www.eevblog.com/forum/blog/eevblog-1681-mailbag-nice-diy-cc-load-amazing-proto-boards-ian-johnston/
28 min
April 16, 2025 EEVblog 1680 – Free Energy from the Earth’s Magnetic Field?
New research shows you can extract a tiny voltage and current from a stationary tube in the earth’s magnetic field. Is this real? It is scaleable to be useful?
Paper: https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.7.013285
IEEE article: https://spectrum.ieee.org/decarbonized-future
Forum: https://www.eevblog.com/forum/blog/eevblog-1680-free-energy-from-the-earths-magnetic-field/
17 min
April 16, 2025 EEVblog 1679 – Why Does a Uni-T AWG Cost $5800? – BOM Cost Analysis
Why does the Uni-T UTG9504T abitary function generator cost US$5800?
A teardown and detailed BOM cost analysis of how much high end product designs costs, and the margins involved.
Forum: https://www.eevblog.com/forum/blog/eevblog-1679-why-does-this-uni-t-awg-cost-$5800-bom-cost-analysis-458562/
00:00 – Why does this Arbitrary Waveform Generator cost US$5800 ?
02:17 – 2.5x BOM Cost multiplier
03:02 – Teardown
06:02 – Power Supply
08:32 – Output stage design. What’s with the shielding?
13:40 – That’s some serious LC filtering
14:54 – The BIg Daddy FPGA
17:28 – BOM cost analysis spreadsheet
22:12 – The 2.5GS/s 14bit DAC is from WHO?
24:10 – The other DAC, to save some cost
25:43 – The drivers cost more than the DAC?
28:49 – Output stage cost on it’s own?
29:59 – Metal work cost?
30:44 – Case plastics cost?
31:15 – LCD cost?
31:37 – Testing and calibration
31:50 – PCB Assembly cost?
33:12 – Non-Recuring Enginering NRE cost and Amortisation
35:14 – Test jigs
35:47 – Total BOM cost is…
37:10 – Dealer margins
42 min
April 11, 2025 ElectroBOOM Stalks Sydney
53 minutes single take randomly walking the streets of Sydney with Mehdi from ElectroBOOM. That is all.
Forum: https://www.eevblog.com/forum/blog/electroboom-stalks-sydney/
54 min
April 04, 2025 EEVblog 1678 – BEWARE of this Oscilloscope Triggering Issue
Oscilloscope have a pre-arm trigger period that can cause confusion if you aren’t aware of it. And how different scopes operate and indicate this in different ways.
Also some potential bugs in the Keysight 3000 and HD3 series scopes.
00:00 – Slow timebases can be problematic for triggering
02:13 – What happens when you press the Single button? Pre-arm / pre-trigger sampling.
03:02 – Keysight 3000T, where’s Wally? Where is the Ready indicator?
03:45 – Keysight 3000T why can I trigger without the Armed/Ready indicator?
06:05 – Schrodinger’s Armed Indicator
07:39 – Beware of pre-arm/ pre-trigger time on slow timebases
08:23 – Keysight HD3, if the Megazoom V any different?
10:47 – Keysight HD3 missed trigger bug?
12:59 – Keysight 3000T 20sec pre-arm delay bug?
13:47 – Siglent SDS1204X HD
15:24 – Rohde & Schwarz MXO4
16:47 – Rigol DHO814
18:52 – Conclusion
Forum: https://www.eevblog.com/forum/blog/eevblog-1678-beware-of-this-oscilloscope-triggering-issue/
22 min
March 31, 2025 EEVblog 1677 – An Interesting Effect with Fuses (EXPERIMENT)
An experiment to test an interesting effect with fuses.
Forum: https://www.eevblog.com/forum/blog/eevblog-1677-an-interesting-effect-with-fuses-(experiment)/
14 min
March 31, 2025 EEVblog 1676 – Lab Timer HACK
Modifying a lab timer to automatically trigger when a fuses blows, for automated fuse testing.
Fuses video: https://www.youtube.com/watch?v=WG11rVcMOnY
Jellybean Transistors: https://www.youtube.com/watch?v=XYdmX8w8xwI
Forum: https://www.eevblog.com/forum/blog/eevblog-1676-lab-timer-hack/
17 min