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...
View ArticleEEVblog 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...
View ArticleEEVblog 1650 – Sequre HT-140 SMD Desoldering Tweezers REVIEW
Review of the Sequre HT-140 USB-C Desoldering Tweezers...
View ArticleEEVblog 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...
View ArticleScanning 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...
View ArticleEEVblog 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/
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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/
View ArticleEEVblog 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
View ArticleEEVblog 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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:...
View ArticleEEVblog 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....
View ArticleEEVblog 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:...
View ArticleEEVblog 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:...
View ArticleEEVblog 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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:...
View ArticleEEVblog 1674 – Dumpster Diving HAUL!
A big dumpster diving find! What did Dave score this time?
View ArticleEEVblog 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...
View ArticleEEVblog 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:...
View ArticleEEVblog 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)/
View ArticleEEVblog 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...
View ArticleElectroBOOM 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/
View ArticleEEVblog 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:...
View ArticleEEVblog 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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/
View ArticleEEVblog 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:...
View ArticleEEVblog 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....
View ArticleEEVblog 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:...
View ArticleEEVblog 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/
View ArticleEEVblog 1687 – A Pointless Alkaline Battery LEAKAGE Repair
The repair of alkaline battery leakage in this Keysight U1177A Bluetooth mulitmeter adapter was, well, pointless…. Forum:...
View ArticleEEVblog 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:...
View ArticleEEVblog 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/
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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...
View ArticleEEVblog 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....
View ArticleeevBLAB 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:...
View ArticleEEVblog 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...
View ArticleEEVblog 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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