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EEVblog 1648 – USB Battery Bank mAh Capacity ratings are a LIE!

USB Battery bank charger capacity explained. When you are comparing battery banks you want to use a measured Output Referred capacity figure, not an Input Referred mAh or Wh figure the manufacturers...

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EEVblog 1649 – Mailbag: M5stack, Beelink Mini PC, ZOYI LCR, ToughOn Battery

More mailbag! 00:00 – Everyones favourite segment! 01:00 – The very clever Edge Wedge from Metric Mind – Zero footprint programing header https://metricmind.com/ 05:19 – M5Stack Embedded processor...

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EEVblog 1650 – Sequre HT-140 SMD Desoldering Tweezers REVIEW

Review of the Sequre HT-140 USB-C Desoldering Tweezers...

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EEVblog 1651 – Home Electrical Switchboard UPGRADE!

I’m finally upgrading the infamous rats nest home switchboard! https://insightelectrical.com.au/ Forum: https://www.eevblog.com/forum/blog/eevblog-1651-home-electrical-switchboard-upgrade/ 00:00 – A...

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Scanning Vintage Computer Service Manuals – Tandy 1100FD Laptop Computer

A small contribution to the retro computer community, scanning a rare Tandy 1100FD laptop computer service manual. https://eevblog.com/files/Tandy1100FD-Service-Manual-Schematics.pdf...

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EEVblog 1652 – Why is my Lab Switchboard Wired Like This?

Why is my lab power switchboard wired like this? Forum: https://www.eevblog.com/forum/blog/eevblog-1652-why-is-my-lab-switchboard-wired-like-this/

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EEVblog 1653 – Alkaline Battery Leakage Testing 2 – Electric Boogaloo

Revisiting the alkaline battery leakage testing with a 555 circuit from a viewer. Forum: https://www.eevblog.com/forum/blog/eevblog-1653-alkaline-battery-leakage-testing-2-electric-boogaloo/ Final...

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EEVblog 1654 – Lee Felsenstein: The Computer Revolution & Counterculture

A full 3 hour discussion with the legendary Lee Felsenstein, designer of the Osborne 1, SOL computer, VDM-1, Pennywhistle modem, and the inventor of social media. Covering everything from the Berkeley...

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EEVblog 1655 – How to Discharge Capacitors SAFELY using a Multimeter

You can use almost any decent modern multimeter to safely discharge high voltage capacitor banks WITHOUT a LowZ function. Forum:...

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EEVblog 1656 – MAILBAG: ElectroPermanent Magnet, DIN PSU’s, Sponge, Beelink...

More Mailbag! 00:00 – DPS Ultrathin DIN 5V PSU’s https://digitalpowersystems.eu/de/standard-produkte/ 01:15 – The Knife 06:16 – USB-C Isolator...

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EEVblog 1657 – DUMPSTER Samsung 75″ QLED One Connect TV

Almost 30 minutes of tearing down a Samsung 75″ QLED One Connect dumpster TV and trying to power it up to see if it’s busted or not. QA75Q7FNA 00:00 Dumpster Samsung QLED 75″ 04:46 – Teardown wasn’t...

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EEVblog 1658 – TUTORIAL: Mean vs Median

It’s important to understand the difference between Mean and Median, not just for engineering, but for everyday life, so you don’t get manipulated by people with bad intentions. UBS Global Wealth...

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EEVblog 1659 – Quick 861 Pro Hot Air Station REVIEW

Review of the new Quick 861 Pro hot air station compared to the original 861DW. Forum: https://www.eevblog.com/forum/blog/eevblog-1659-quick-861-pro-hot-air-station-review/

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EEVblog 1660 – AC Basics Tutorial Part 4: Resistors, Capacitors, Inductors

Part 4 in the AC basics tutorial series. AC applied to resistors, capacitors and inductors, along with Capacitive Reactance and Inductive reactance. AC Theory Playlist

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EEVblog 1661 – AC Basics Tutorial Part 5: Time Domain vs Frequency Domain

The difference between Time Domain and Frequency Domain in AC circuit analysis. AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum:...

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EEVblog 1662 – Vintage Tandy 200 Portable Computer Claytons Repair/Teardown

This was going to be a repair of a vintage Tandy 200 Portable Computer… Forum: https://www.eevblog.com/forum/blog/eevblog-1662-vintage-tandy-200-portable-computer-claytons-repairteardown/ 00:00 – I...

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EEVblog 1663 – BM786 Multimeter REPAIR + InEr Error Investigation

Repairing a customers Brymen BM786 multimeter, and investigating the cause of the InEr error message on the input jack alert feature. Plus a giveaway to a local youngster. 00:00 – A returned BM786...

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EEVblog 1664 – REPAIR with Junk Bin Parts! Keithley 2302

Repair of a Keithley 2302 battery simulator with junk bin parts. But it did put up a fight! Teardown video: https://www.youtube.com/watch?v=5LK8wduZsy0 Forum:...

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EEVblog 1665 – Keithley VFD REPAIR 2 – Electric Boogaloo

Part 2 of the Keithley 2302 battery simulator repair of the VFD display. Just a follow-up on testing the actual VFD display itself to see if there is any fault that’s not the VFD vacuum. 00:00 – Having...

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EEVblog 1666 – Blown SMD Component Identification

Let’s find out what this blown SMD part is, sent in by a viewer. Forum: https://www.eevblog.com/forum/blog/eevblog-1666-blown-smd-component-identification/ Component Playlist:...

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EEVblog 1667 – Reverse Engineering the Brymen BM2257 Multimeter LowZ Mode

Reverse Engineering the Brymen BM2257 Multimeter front end to understand what changes have been made from the BM235 in the Low Z mode. DaveCAD time. Also some testing of the LowZ mode and how it works....

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EEVblog 1668 – HORRIFIC Alkaline Battery Leakage in Rare Prototype Multimeter

Horrific alkaline battery leakage in a rare prototype EEVblog 555 Multimeter. Can it be repaired? Forum:...

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EEVblog 1669 – Agilent U53131A VFD to LED Display Upgrade MAILBAG

A mailbag replacement custom LED display for the Agilent U53131A VFD display frequency counter. www.hubequip.net Forum:...

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EEVblog 1670 – BM786 Multimeter BATTERY LEAKAGE REPAIR + GIVEAWAY

How can the same sh!t happen to the same guy twice? And a trap for young players with LCD’s. And a giveaway for the young whippersnapper in Australia. Forum:...

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EEVblog 1672 – JBL REPAIR: You’ll never guess the fault!

Repair of a JBL Partybox 310 speaker. Follow along as Dave goes down the repair rabbit hole. Try and guess the exact fault before Dave does, it’s a doozy! 00:00 – JBL Partybox 310 Speaker fault...

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EEVblog 1673 – JBL Partybox 310 Repair – Part 2 (SPOILER)

A quick follow-up to the JBL Partybox 310 speaker repair and speculation on WHY the fault happened the way it happened. Contains SPOLIERS, so watch Part 1 first! Forum:...

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EEVblog 1674 – Dumpster Diving HAUL!

A big dumpster diving find! What did Dave score this time?

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EEVblog 1675 – Corporate Enforced WASTE! Ninja Blender REPAIR (Right To Repair)

Our Ninja blender blade failed. For a warranty replacement they wanted us to DESTROY and DISPOSE OF the old perfectly working base unit before sending a new one. Let’s see about that… The first ever...

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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:...

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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)/

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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...

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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/

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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:...

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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:...

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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...

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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/

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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:...

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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....

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EEVblog 1685 – Australian Manufacturing Week 2025: Walkaround

A walk around the Australian Manufacturing Week exhibition in Melbourne 2025, looking at mechanical stuff Dave has no idea about. Forum:...

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EEVblog 1686 – Electronex 2025 Melbourne – Walkaround

A complete walkaround of the Electronex 2025 exhibition in Melbourne Forum: https://www.eevblog.com/forum/blog/eevblog-1686-electronex-2025-melbourne-walkaround/

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EEVblog 1687 – A Pointless Alkaline Battery LEAKAGE Repair

The repair of alkaline battery leakage in this Keysight U1177A Bluetooth mulitmeter adapter was, well, pointless…. Forum:...

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EEVblog 1688 – Constant Current Sources EXPLAINED + DEMO

DC Constant Current sources explained and demonstrated. Forum: https://www.eevblog.com/forum/blog/eevblog-1688-constant-current-sources-explained-demo/ Voltage and Current Source Theory:...

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EEVblog 1689 – ANOTHER Dumpster Diving A3 Colour Photocopier!

Another Colour A3 photocopier in the dumpster! Is this an upgrade? Fuji-Xerox Docucentre V C4476 Forum: https://www.eevblog.com/forum/blog/eevblog-1689-another-dumpster-diving-a3-colour-photocopier/

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EEVblog 1690 – Mailbag: Zifnu LED, Quantum Diamonds, Logic Gates, M.2 NAS

More Mailbag! 00:00 – Zifnu K-16 Kickstarter LED light https://www.zifnu.com/ 11:02 – Qoool Sensing: Diamond Quantum Fluorescence Demo https://qoool-sensing.org 16:41 – Logic Gate Educational Demo...

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EEVblog 1691 – Uni-T UDP6731 360W Bench PSU REVIEW

The Uni-T UDP6700 series UDP6731 360W slimline Bench Lab Power Supply REVIEWED https://instruments.uni-trend.com/products/dc-power-supplies/UDP6700...

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EEVblog 1692 – $130 Fluke 17B MAX Multimeter REVIEW

Is a US$130 Fluke multimeter any good? A review of the Fluke 17B MAX Multimeter Forum: https://www.eevblog.com/forum/blog/eevblog-1692-$130-fluke-17b-max-multimeter-review/ Why are Fluke meters so...

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EEVblog 1693 – Uni-T UTE310 Power Meter Teardown & Practical Demo

A teardown of the Uni-T UTE 310 Digital Power Meter, and an example meausing the power consumption of the new Brymen BM786BT multimeter in bluetooth data transmission mode....

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eevBLAB 130 – Youtube Are FINALLY Demonetising AI Slop Channels

It looks like Youtube are finally going to do something about the AI slop channels that are plaguing Youtube? It’s called YOUtube for a reason. If you want AI info slop, go to INFOtube. Forum:...

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EEVblog 1694 – Scarlet Rae Teardown + Design Discussion with Xentronics

A teardown and design discussion of the Scarlett Rae heater for females, with the designer Scott Williams from Xentronics. Recorded at the Electronex exhibition in Melbourne...

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EEVblog 1695 – Mailbag: Robin RCD Tester, PCB Book, USB Knob, Geekom IT12...

More mailbag! 00:00 – Nifty USB Knob from Tiny Little Gadgets https://www.etsy.com/uk/shop/TinyLittleGadgets 03:38 – Reference Circuit PCB books...

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