Qualcomm have bought out Arduino, and several weeks later have altered the Terms & Conditions. Dave does a deep dive of the changes. https://www.arduino.cc/en/terms-conditions/ https://web.archive.org/web/20250912221625/https://www.arduino.cc/en/terms-conditions/ 00:00 – Qualcomm have acquired Arduino. I’ve got a bad feeling about this… 01:02 – How much did they pay for Arduino? 02:54 – They have changed the Terms And …

More mailbag! 00:00 – Biggest mailbag load EVER. Too much random vintage USSR stuff to list… 26:24 – Logicgat Digital Logic training board. https://logicgat.es/ 31:22 – SLogic16U3 $69 USB3 800MHz Logic Analyser https://wiki.sipeed.com/hardware/en/logic_analyzer/slogic16u3/Introduction.html Forum: https://www.eevblog.com/forum/blog/eevblog-1720-mailbag-ussr-bonanza-logic-training-$69-logic-analyzer/

Expanding the AERL home storage battery from 25kWh to 75kWh! Also replacing the 5kW Deye hybrid inverter with an 8kW Solis hybrid inverter. And installing a changeover switch to power most of the house from the Backup port in the new inverter. https://www.aerl.com.au/products/life2-battery https://www.thomsonenergy.com.au/ Solis s6-eh1p8k-l-plus-au https://www.solisinverters.au/uploads/files/202506/Solis_Manual_S6-EH1P(3-8)K-L-PLUS_AU_V1,1(20250530).pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1719-75kwh-home-storage-battery-expansion/ 00:00 – 75kW Battery Expansion 05:11 …

What use is a 1GHz oscilloscope if it doesn’t have a high frequency active probe interface? Well, there are several options including a cheap $5 DIY resistive probe. Practical demonstration of active FET probing vs Passive Probing vs DIY Resistive probing. A lot of material extracted from videos 1367 and 1368 Forum: https://www.eevblog.com/forum/blog/eevblog-1718-is-a-cheap-1ghz-oscilloscope-useless-($5-diy-1ghz-resistive-prob/ 00:00 – …

Rigol have released the new MHO900 series mixed signal oscilloscope. For $999 entry level MHO934 you get 4CH 350MHz 12 bit at 4Gs/s, this is insane! Teardown of the special edition 1GHz MHO98 (still only $1399!) https://www.rigol.com/intl/products/oscilloscope/MHO900.html https://www.rigolna.com/products/digital-oscilloscopes/mho900/ In Australia: https://emona.com.au/quick-links/rigol/ 00:00 – Special Limited Edition MHO98 01:07 – DHO900 vs MHO900 03:06 – Is …

A viewer went dumpster diving at the University of Technology and found some classics. Teardown and playing with a Kikusui DSS5040 Analog/Digital Storage scope. Plus a classic Australian BWD 603B Mini-Lab Manual: https://www.eevblog.com/files/Kikusui_DSS5040_E.pdf 00:00 – University Dumpster diving time! 02:46 – Kikusui DSS5040 Analog/Digital storage oscilloscope 07:12 – Teardown 10:51 – Power On 17:14 – …

Swiss company Euler Precision have a new 3GHz active probe on Crowd Supply, let’s take a look. https://www.crowdsupply.com/euler-precision/esap-30 00:00 – The Euler Precision eSAP-30 Active Probe 01:26 – The problem with passive probes, Capacitance Reactance 03:31 – Unboxing 05:55 – Open Source? 06:46 – It’s all about the probe accessories 08:08 – Measurement report 10:02 …

Classic intermittent “popping” noise from this Presonus Eris 5 studio monitor speaker. Electrolytic Capacitors are suspect number one. 00:00 – Faulty Presonus Eris 5 speaker. Classic “popping” sound. 03:48 – Teardown 07:16 – Testing for popping again 07:36 – Testing for hiss 08:32 – Rectified voltage testing 09:34 – Woah, that’s that? 10:26 – Getting …

A look at the crazy ferrite core density in the Ampex 1600 16k x 18 bit word magnetic core memory from Ampex Memory Products Division, used in the Mitra 125S computer for the Spacelab program on the Space Shuttle. 00:00 – Magnetic core memory 01:52 – How magnetic core memory works 07:12 – Ampex high …

A tour inside the brand new CSIRO Mobile Mission Control & Operations Centre, built inside a b-double truck. Dr Mark Dunn gives us a tour of the new fitout. https://research.csiro.au/moc/ Purpose-built, the b-double trailer deploys into a fully operational mission control centre that can accommodate up to 30 mission operators, each supported by configurable multi-monitor …

YouTube have just released new AI video Shorts features built into the Youtube app itself. Let’s create an AI slop Short in minutes using Veo 3 and see what fresh new hell you’re in for on Youtube. If you thought AI slop was already bad enough on Youtube, it’s just leveled up. https://aardvark.co.nz/daily/2025/0918.shtml Forum: https://www.eevblog.com/forum/blog/eevblab-133-youtube-just-self-destructed-(ai-shorts)/

A walkaround of the show floor of the International Astronautical Congress IAC 2025 in Sydney Forum: https://www.eevblog.com/forum/blog/eevblog-1711-international-astronautical-congress-iac-2025-walkaround/

More mailbag! 00:00 – Tennismatic saw my repair video! 03:23 – Stickers 04:34 – Offerman Industries DC-DC Boost Converter Datasheet: https://www.omnionpower.com/assets/pdfs/windchill/data-sheet/abxs001_ds.pdf https://offerman.industries/products/32-54v-adjustable-output-dc-dc-step-up-boost-converter-8-16v-wide-input-65w-output 05:59 – Bypass Capacitors in Parallel? 07:51 – Sexy clear solder mask 11:25 – Load Testing https://www.covingtoninnovations.com/ https://juniorgeniuskits.com/ 16:35 – Book: Electronic Experiments for Young Learners 21:52 – All Hail Wago Connectors 22:05 …

Was supposed to be a regular mailbag with multiple items, but this Haasoscope Pro was a 1.5hrs of raw footage adventure I have edited down to 45min, warts and all. So no other items, just this. TLDR; This open source 2GHz 3.2GS/s USB Oscilloscope needs a lot of work… This is not a full review, …

Another viewer question, can we identify this SMD component? https://x.com/Joostnietsmeer/status/1967941676061823401 Forum: https://www.eevblog.com/forum/blog/eevblog-1708-whats-this-smd-part/

Dave’s Goal Zero Yeti 400 lithium ion battery failed. Repair time. Forum: https://www.eevblog.com/forum/blog/eevblog-1707-repair-goal-zero-yeti-400-lithium-battery/ 00:00 – Goal Zero Yeti 400 Battery failure 01:32 – Hiccuping 03:28 – Teardown 04:47 – Failure hypothesis and potential solution 05:37 – The mains inverter PCB 06:43 – The control PCB 07:36 – Dual battery connectors 08:09 – Measuring the dual …

Is a wrist worn multimeter actually useful? A review of the CZDANG K8 https://s.click.aliexpress.com/e/_opDFvin Use coupon code “doesntsuck” for 10% off the EEVblog 1980s pocket multimeter EEVblog 1980s Pocket Multimeter Forum: https://www.eevblog.com/forum/blog/eevblog-1706-k8-wrist-worn-multimeter-review/

The world’s first desktop personal computer wasn’t the Apple 1 or the Altair 8800. It wasn’t even the HP 9100A, it was the Olivetti Programma 101 from 1965! Computer Teardowns don’t get much more vintage than this. Forum: https://www.eevblog.com/forum/blog/eevblog-1705-the-worlds-first-desktop-computer-teardown/ Links: http://www.oldcomputers.arcula.co.uk/calc3.htm https://bellini.it/portfolio-articoli/mario-bellini-designer/ http://www.curtamania.com/curta/database/brand/olivetti/olivetti%20programma%20101/index.html https://ub.fnwi.uva.nl/computermuseum/delayline.html https://ub.fnwi.uva.nl/computermuseum/p101dl.html https://avvocatostella.com/wp-content/uploads/2015/12/Il-primo-personalcomputer-lOlivetti-La-Programma-101.pdf https://www.oldcalculatormuseum.com/c-programma101.html https://www.fondazioneadrianolivetti.it/en/p101-cecam/ https://www.inexhibit.com/case-studies/olivetti-programma-101-at-the-origins-of-the-personal-computer/ https://forum.vcfed.org/index.php?threads/olivetti-programma-101-documentations-and-experiences.1239428/ https://handwiki.org/wiki/Engineering:Programma_101 Service manual: https://vintagecomputer.ca/files/Olivetti/Programma%20101/repair/RepairManualP101.pdf Reference …

WTF is this design? The ANENG 626 Smart Multimeter Forum: https://www.eevblog.com/forum/testgear/aneng-626-multimeter-hell/ 00:00 – ANENG 626 Unboxing 02:14 – Charging + USB isolation test. CAT III 600V LOL 03:32 – Power on and UI 05:20 – UI Design Hell + Chocolate Wheel mode. Every child wins a prize! 06:26 – Continuity mode 07:13 – Screen angle …

A repair of this Tennismatic T1000 remote control was way more interesting than I expected. https://tennismatic.com/main/page_products_ball_machines_t100_series.html Forum: https://www.eevblog.com/forum/blog/eevblog-1702-a-most-interesting-repair/ 00:00 – Tennismatic 1000 Tennis ball machine remote control 00:53 – Battery snap ohms measurement 01:17 – Battery current measurement 02:29 – It’s a row/column thing 02:57 – Teardown 05:20 – Membrane inspection 06:44 – Membrane keypad …