Shows
EEVblogEEVblog 1697 – What’s Up With Different Brand Op-Amps?Why does this Uni-T UDP6731 PSU use different brand LM358 opamps on the same PCB?
All about Bill Of Materials, SMD pick and place machines, suppliers and specifications.
Links:
Jellybean Opamps: https://www.youtube.com/watch?v=uq1DMWtjL2U
NESS Factory tour: https://www.youtube.com/watch?v=bTij7Juj5qE
http://www.artschip.com/pdf/LM358.pdf
https://www.st.com/content/ccc/resource/technical/document/datasheet/61/46/87/01/98/ed/44/c5/CD00000464.pdf/files/CD00000464.pdf/jcr:content/translations/en.CD00000464.pdf
Forum: https://www.eevblog.com/forum...2025-07-2118 minEEVblogEEVblog 1696 – TUTORIAL: Wind Power 101A short tutorial on the maximum efficiency and power you can get from a wind generator. Also applies to water turbine generators.
Also deriving the industry standard wind power formula from first principles: Power (W) = 1/2 x ρ x A x v^3
Don’t let any wind power marketing scams fool you, you canna’ beat the laws of physics Captain, or Betz’s Law.
Forum: https://www.eevblog.com/forum/blog/eevblog-1696-tutorial-wind-power-101/
2025-07-2100 minEEVblogEEVblog 1695 – Mailbag: Robin RCD Tester, PCB Book, USB Knob, Geekom IT12 Mini PCMore mailbag!
00:00 – Nifty USB Knob from Tiny Little Gadgets
https://www.etsy.com/uk/shop/TinyLittleGadgets
03:38 – Reference Circuit PCB books
https://www.boltind.com/product-category/reference-circuits-books/
09:57 – Robin RCD/ELCB Tester
20:57 – Geekom IT12 i7 Mini PC
Forum: https://www.eevblog.com/forum/blog/eevblog-1695-mailbag-robin-rcd-tester-pcb-book-usb-knob-geekom-it12-mini-p/
2025-07-1635 minEEVblogEEVblog 1694 – Scarlet Rae Teardown + Design Discussion with XentronicsA 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
https://scarletperiod.com/products/rae
https://xentronics.com.au/
The Amp Hour discussion on design consulting: https://theamphour.com/624-design-manufacturing-consulting-with-scott-williams-from-xentronics/
Forum: https://www.eevblog.com/forum/blog/eevblog-1694-scarlet-rae-teardown-and-design-discussion-with-xentronics/
2025-07-0912 minEEVblogEEVblog 1693 – Uni-T UTE310 Power Meter Teardown & Practical DemoA 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.
https://uni-trendus.com/products/ute310-digital-power-meter
Forum: https://www.eevblog.com/forum/blog/eevblog-1693-uni-t-ute310-power-meter-teardown-practical-demo/
00:00 – Uni-T UTE310 Power Meter
02:44 – Teardown
06:54 – Power supply
07:47 – FPGA and ARM processors (plural)
09:23- Seperate isolated volatge and current measurements
11:28 – Special Snowflake shunt resistor
14:04 – Turn on and a looks at the current ranges
15:04 – Flashing LEDs
15:51 – Shunt resistor heatsink sizing
16:46 – Inside the metal cans. ADC’s...2025-06-3042 minEEVblogEEVblog 1692 – $130 Fluke 17B MAX Multimeter REVIEWIs 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 expensive: https://www.youtube.com/watch?v=ay9wFQAW19Y
Fluke 17B multimeter teardown: https://www.youtube.com/watch?v=TbEtcpM0RGc
Fluke vs Brymen Teardown: https://www.youtube.com/watch?v=3Hlmq57FQQk
00:00 – US$130 Fluke 17B MAX Multimeter
02:32 – Construction
04:52 – What’s in the (China Only) box?
06:14 – New TL31 probes for electronics use
07:03 – Teardown
11:32...2025-06-3037 minEEVblogEEVblog 1691 – Uni-T UDP6731 360W Bench PSU REVIEWThe Uni-T UDP6700 series UDP6731 360W slimline Bench Lab Power Supply REVIEWED
https://instruments.uni-trend.com/products/dc-power-supplies/UDP6700
https://uni-trendus.com/products/udp6731-360w-basic-dc-switching-power-supply-80v-15a
00:00 – Uni-T UDP6731 PSU
01:30 – Beware of thermal stacking
02:55 – Teardown
07:35 – Sneaky fan
11:24 – Remember the Riden RD6006, also 350W
13:10 – Power up
16:04 – The display and UI
18:14 – Instantaneous knob
19:16 – Only 600 memory settings, meh.
20:10 – No ability to disable voltage sense, and some oddities.
23:22 – Accuracy spec
26:13 – What fan noise?
27:45 – Have I KILLED it?
28:46 – WTF is going on here?! Rigol or Uni-T problem?
32:05 – Did m...2025-06-1351 minEEVblogEEVblog 1690 – Mailbag: Zifnu LED, Quantum Diamonds, Logic Gates, M.2 NASMore 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 Board
https://logicgat.es/
20:15 – Beelink ME Mini 6 x M.2 Slot Home Storage NAS
https://www.bee-link.com/products/beelink-me-mini-n150?ref=OKJKQ
Forum: https://www.eevblog.com/forum/blog/eevblog-1690-mailbag-zifnu-led-quantum-diamonds-logic-gates-m-2-nas/
2025-06-0538 minEEVblogEEVblog 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/
2025-06-0509 minEEVblogEEVblog 1688 – Constant Current Sources EXPLAINED + DEMODC 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: https://www.youtube.com/watch?v=AQK7RyecVW0
DC Circuit Fundamentals Playist: https://www.youtube.com/playlist?list=PLvOlSehNtuHtVLq2MDPIz82BWMIZcuwhK
00:00 – Constant Current Sources
11:08 – Practical uses of constant current sources
14:00 – Circuit examples
19:13 – TL431 Example
20:25 – LM317 CC circuit
21:42 – Low Side Source vs High Side Current Sink
24:19 – Bench examples
26:24 – Your PSU is a CC generator!
28:04 – Keithley 225 Constant Current Source
31:09 – LED strip example of Compliance Voltag2025-05-3034 minEEVblogEEVblog 1687 – A Pointless Alkaline Battery LEAKAGE RepairThe repair of alkaline battery leakage in this Keysight U1177A Bluetooth mulitmeter adapter was, well, pointless….
Forum: https://www.eevblog.com/forum/blog/eevblog-1687-a-pointless-alkaline-battery-leakage-repair-462018/
2025-05-2212 minEEVblogEEVblog 1686 – Electronex 2025 Melbourne – WalkaroundA complete walkaround of the Electronex 2025 exhibition in Melbourne
Forum: https://www.eevblog.com/forum/blog/eevblog-1686-electronex-2025-melbourne-walkaround/
2025-05-2050 minEEVblogEEVblog 1685 – Australian Manufacturing Week 2025: WalkaroundA walk around the Australian Manufacturing Week exhibition in Melbourne 2025, looking at mechanical stuff Dave has no idea about.
Forum: https://www.eevblog.com/forum/blog/eevblog-1685-australian-manufacturing-week-2025-walkaround/
2025-05-1353 minEEVblogEEVblog 1684 – Awesome Logging Software: Test ControllerTest 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/
2025-05-1100 minEEVblogEEVblog 1683 – Sun-Ways Solar Freakin RAILways – Part 2Sun-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.co...2025-05-0933 minEEVblogEEVblog 1682 – Enphase Microinverter FAIL & Warranty InstallOne 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/
2025-04-3013 minEEVblogEEVblog 1681 – Mailbag: Nice DIY CC Load, Amazing Proto Boards, Ian JohnstonMore 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/
2025-04-2627 minEEVblogEEVblog 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/
2025-04-1716 minEEVblogEEVblog 1679 – Why Does a Uni-T AWG Cost $5800? – BOM Cost AnalysisWhy 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 s...2025-04-1741 minEEVblogEEVblog 1678 – BEWARE of this Oscilloscope Triggering IssueOscilloscope 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...2025-04-0521 minEEVblogEEVblog 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)/
2025-03-3113 minEEVblogEEVblog 1676 – Lab Timer HACKModifying 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/
2025-03-3116 minEEVblogEEVblog 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 EEVBlog video with zero commentary, just memes.
My breakfast smoothie: https://www.youtube.com/shorts/-2mf1mqZVQ0
Forum: https://www.eevblog.com/forum/blog/eevblog-1675-ninja-blender-repair-because-why-(right-to-repair)/
Credits:
“Our Story Begins” Kevin MacLeod (incompetech.com)
“Cloud Dancer ” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecomm...2025-03-3104 minEEVblogEEVblog 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: https://www.eevblog.com/forum/blog/eevblog-1672-jbl-repair-youll-never-guess-the-fault/
2025-03-1009 minEEVblogEEVblog 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 symptoms and initial failure speculation
02:57 – Teardown
06:23 – Is it a firmware lockup issue?
07:17 – Checking the power switch
09:13 – Main PCB’s
10:52 – Hello IT, have you tried turning it off and on again
11:46 – PCB microscope inspection
13:39 – Bench testing and, thou shalt test voltages
16:31 – Looking at the keypad PCB again
17:41 – Replicate the fault using an external PSU
22:55 – Schematic, we have Schematic!
2...2025-03-0546 minEEVblogEEVblog 1670 – BM786 Multimeter BATTERY LEAKAGE REPAIR + GIVEAWAYHow 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: https://www.eevblog.com/forum/blog/eevblog-1670-bm786-multimeter-battery-leakage-repair-giveaway/
00:00 – How can the same sh!t happen to the same guy twice?
06:27 – Zebra strip elastomeric connector
09:40 – It STILL doesn’t work? Trap for young players with LCD’s
17:38 – I don’t hide my mistakes
18:30 – GIVEAWAY
2025-02-2719 min
EEVblog on OdyseeEEVblog 1670 - BM786 Multimeter BATTERY LEAKAGE REPAIR + GIVEAWAYHow 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: https://www.eevblog.com/forum/blog/eevblog-1670-bm786-multimeter-battery-leakage-repair-giveaway/00:00 - How can the same sh!t happen to the same guy twice?06:27 - Zebra strip elastomeric connector09:40 - It STILL doesn't work? Trap for young players with LCD's17:38 - I don't hide my mistakes18:30 - GIVEAWAYWeb Site: http://www.eevblog.com2025-02-2619 min
EEVblog on OdyseeEEVblog 1669 - Agilent 53131A VFD to LED Display Upgrade MAILBAGA mailbag replacement custom LED display for the Agilent 53131A VFD display frequency counter.www.hubequip.netOven oscillator upgrade: https://www.youtube.com/watch?v=KmZwAjmzHx8Playlist of related videos! https://www.youtube.com/playlist?list=PLvOlSehNtuHupdUJVYdRnihTTQ_Tw7MHtForum thread on the display: https://www.eevblog.com/forum/testgear/hp-agilent-53131a-53132a-vfd-to-led-conversion/2025-02-2114 min
EEVblog on OdyseeEEVblog1668-555-Multimeter-Battery-LeakageEEVblog 1668 - HORRIFIC Alkaline Battery Leakage in Rare Prototype Multimeter2025-02-2119 minEEVblogEEVblog 1669 – Agilent U53131A VFD to LED Display Upgrade MAILBAGA mailbag replacement custom LED display for the Agilent U53131A VFD display frequency counter.
www.hubequip.net
Forum: https://www.eevblog.com/forum/blog/eevblog-1669-agilent-u53131a-vfd-to-led-display-upgrade-mailbag/
2025-02-1914 minEEVblog on OdyseeEEVblog 1668 - HORRIFIC Alkaline Battery Leakage in Rare Prototype MultimeterHorrific alkaline battery leakage in a rare prototype EEVblog 555 Multimeter.Can it be repaired?Forum: https://www.eevblog.com/forum/blog/eevblog-1668-horrific-alkaline-battery-leakage-in-rare-prototype-multimeter/2025-02-1819 min
EEVblog on OdyseeEEVblog 1667 - Reverse Engineering the Brymen BM2257 Multimeter LowZ ModeReverse 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.Forum: https://www.eevblog.com/forum/blog/eevblog-1667-reverse-engineering-the-brymen-bm2257-multimeter/MOV datasheet: https://www.cnr.com.tw/cloudSpace/CNR_D.pdfHow to reverse engineer: https://www.youtube.com/watch?v=lJVrTV_BeGgMultimeter Input Protection: https://www.youtube.com/watch?v=zUhnGp5vh602025-02-1821 minEEVblogEEVblog 1668 – HORRIFIC Alkaline Battery Leakage in Rare Prototype MultimeterHorrific alkaline battery leakage in a rare prototype EEVblog 555 Multimeter.
Can it be repaired?
Forum: https://www.eevblog.com/forum/blog/eevblog-1668-horrific-alkaline-battery-leakage-in-rare-prototype-multimeter/
2025-02-1519 minEEVblogEEVblog 1667 – Reverse Engineering the Brymen BM2257 Multimeter LowZ ModeReverse 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.
Forum: https://www.eevblog.com/forum/blog/eevblog-1667-reverse-engineering-the-brymen-bm2257-multimeter/
MOV datasheet: https://www.cnr.com.tw/cloudSpace/CNR_D.pdf
How to reverse engineer: https://www.youtube.com/watch?v=lJVrTV_BeGg
Multimeter Input Protection: https://www.youtube.com/watch?v=zUhnGp5vh60
2025-02-1521 minEEVblogEEVblog 1666 – Blown SMD Component IdentificationLet’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: https://www.youtube.com/playlist?list=PLvOlSehNtuHtdQF-m5UFZ5GEjABadI3kI
2025-02-0615 minEEVblogEEVblog 1665 – Keithley VFD REPAIR 2 – Electric BoogalooPart 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 another look at the failed Newhaven VFD dispaly module
05:37 – Measurign voltages
07:32 – Oscilloscope probing
08:33 – HELLO capacitor! But not the one I expected.
12:25 – To the SMD cap replacement kit
13:11 – Rail measurements again
14:38 – Big ripple improvement, but lets qild the lilly.
15:53 – Bugger! Ok, let’s try the belt’n’braces approach.
17:21 – Winner Winner Extra Chicken Dinner!
Forum: https://www.e...2025-02-0617 minEEVblogEEVblog 1664 – REPAIR with Junk Bin Parts! Keithley 2302Repair 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: https://www.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/
00:00 – Faulty VFD display in a Keithley 2302 Battery Simulator
01:22 – Teardown
03:14 – The Display driver PCB
04:30 – Solder Sucking Sucks
05:26 – The VFD display module, a Newhaven Display VFM162SDAR8
06:50 – Probing Pro Tip
07:28 – Probing the VFD signals on the oscilloscope
09:42 – Searching for a replacement 16×2 VFD display
15:03 – Potential replacement LCD
16:38 – Identical replacement found2025-02-0626 min
EEVblog on OdyseeEEVblog 1666 - Blown SMD Component IdentificationLet'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: https://www.youtube.com/playlist?list=PLvOlSehNtuHtdQF-m5UFZ5GEjABadI3kI2025-02-0615 minEEVblogEEVblog 1663 – BM786 Multimeter REPAIR + InEr Error InvestigationRepairing 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 Multimeter with InEr error message
03:23 – Split jacks and input alert circuit
05:19 – In-Circuit probing TIP and Low Ohms mode.
07:19 – A clue?
08:05 – A need a new desoldering gun. Removing the input jacks
10:30 – Bodge testing of the input detection threshold
12:38 – Not one but TWO failed Megger Insulation meters!
13:50 – Megger testing the connectors at 500V
15:19 – Testing a 2nd failed InEr error meter2025-01-2526 minEEVblogEEVblog 1662 – Vintage Tandy 200 Portable Computer Claytons Repair/TeardownThis 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 sear this Tandy 200 had a problem…
02:54 – Teardown
03:57 – The new BM2257 Multimeter
05:25 – I think it’s the buzzer
08:06 – Microscope teardown
16:20 – They don’t make service manuals like they used to
25:57 – Try to reproduce the fault
2025-01-2531 minEEVblogEEVblog 1661 – AC Basics Tutorial Part 5: Time Domain vs Frequency DomainThe difference between Time Domain and Frequency Domain in AC circuit analysis.
AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q-
Forum: https://www.eevblog.com/forum/blog/eevblog-1661-ac-basics-tutorial-part-5-time-domain-vs-frequency-domain/
2025-01-1112 minEEVblogEEVblog 1659 – Quick 861 Pro Hot Air Station REVIEWReview 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/
2025-01-0331 minEEVblogEEVblog 1658 – TUTORIAL: Mean vs MedianIt’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 Report:
https://www.ubs.com/content/dam/assets/wm/global/insights/doc/global-wealth-report.pdf
Forum: https://www.eevblog.com/forum/blog/eevblog-1658-tutorial-mean-vs-median/
2024-12-2816 minEEVblogEEVblog 1657 – DUMPSTER Samsung 75″ QLED One Connect TVAlmost 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 easy as expected…
08:11 – What is this cable retention BS?
11:26 – I’m still at it…
14:22 – Where’s Wally? Follow the voltage.
17:26 – Where do I get 350V DC at a few hundred watts?
21:21 – DIY 350V DC power supply
22:52 – 350V DC right up the clacker
24:19 – I need MORE voltage
Forum: https://www.eevblog.com/forum/blog/eevblog-1657-dumpster-samsu...2024-12-2126 minEEVblogEEVblog 1656 – MAILBAG: ElectroPermanent Magnet, DIN PSU’s, Sponge, Beelink EQ14 N150 PCMore Mailbag!
00:00 – DPS Ultrathin DIN 5V PSU’s
https://digitalpowersystems.eu/de/standard-produkte/
01:15 – The Knife
06:16 – USB-C Isolator
https://digitalpowersystems.eu/de/schnelle-und-sichere-usb-zu-uart-kommunikation-dank-digitaler-isolierung-und-esd-schutz-fur-ein-und-ausgange/
07:34 – Zubax FluxGrip FG40 Electropermanent Magnet for Drones
https://zubax.com/products/magnets/fluxgrip/fg40
11:55 – Testing the magnet
14:04 – Drone delivered multimeters?
14:53 – Why did someone send this?
15:46 – Wireless Freakin’ Road Charging
https://www.youtube.com/watch?v=sisD61ohzK0
19:37 – Sponge Bonanza
21:21 – Beelink EQ14 Intel Twin Lake N150 Mini PC
Forum: https://www.eevblog.com/forum/blog/eevblog-1656-mailbag-electropermanent-magnet-din-psus-sponge-beelink-eq14/
2024-12-1828 minEEVblogEEVblog 1655 – How to Discharge Capacitors SAFELY using a MultimeterYou can use almost any decent modern multimeter to safely discharge high voltage capacitor banks WITHOUT a LowZ function.
Forum: https://www.eevblog.com/forum/blog/eevblog-1655-multimeter-tip-discharge-capacitors-using-any-meter/
Transistor Zener Clamp video: https://www.youtube.com/watch?v=BGcKjy_UNQ4
2024-12-0909 minEEVblogEEVblog 1654 – Lee Felsenstein: The Computer Revolution & CountercultureA 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 free speech movement, the counterculture movement, his career, through to Obsorne and how he invented social media with Community Memory.
His book: https://www.amazon.com/Me-My-Big-Ideas-Counterculture/dp/B0DJ8T45F1/
https://felsensigns.com/
Forum: https://www.eevblog.com/forum/blog/eevblog-1654-lee-felsenstein-counterculture-the-computer-revolution/
00:00 – Full 3 hour talk with Lee Felsenstein
08:24 – University of California at Berkeley, and the Free Speech Movement.
29:04 – First Junior Engine...2024-11-292h 58EEVblogEEVblog 1653 – Alkaline Battery Leakage Testing 2 – Electric BoogalooRevisiting 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 results of the first leakage testing: https://www.youtube.com/watch?v=BScnU4BT4xk
2024-11-2214 minEEVblogEEVblog 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/
2024-11-2207 minEEVblogEEVblog 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 look at the old switchboard
03:29 – Single Phase
04:57 – Surge protection
05:28 – Old school ceramic fuses
06:04 – Inside the infamous Rats Nest!
08:29 – Simon from Insight Electrical
09:09 – Could you still do wiring like this?
10:04 – What’s the plan?
11:12 – A look at the Hager surge protector
https://hager.com/au/products/download/product/asset/file/SURGE_BROCHURE_AUS_LOWRES.PDF
11:42 – Lightning strikes
12:19 – Current clamps and wiring looms2024-11-1236 minEEVblogEEVblog 1650 – Sequre HT-140 SMD Desoldering Tweezers REVIEWReview of the Sequre HT-140 USB-C Desoldering Tweezers
https://sequremall.com/collections/diy-tools/products/sequre-ht140-2in1-hot-tweezers-soldering-iron-desoldering-repair-tool-for-smd?variant=44204748275900
Forum: https://www.eevblog.com/forum/blog/eevblog-1650-sequre-ht-140-smd-desoldering-tweezers-review/
2024-11-0618 minEEVblogEEVblog 1649 – Mailbag: M5stack, Beelink Mini PC, ZOYI LCR, ToughOn BatteryMore 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 modules
https://shop.m5stack.com/products/m5stack-core2-esp32-iot-development-kit
11:28 – Err, the polarity is BACKWARDS!
12:41 – The M5stack website and UIflow2 GUI software
21:20 – Teardown of the M5stack Core2 module
23:16 – Beelink EQi12 Mini PC
https://amzn.to/40kWbvb
26:46 – Mini PC teardown
33:42 – ZOYI / Zotech ZT-FS1 Handheld Anemometer
https://amzn.to/4e6FtCX
38:02 – ZOYI / Zotech ZT-MD1 LCR Tweezers
https://amzn.to/4frMejI
46:17...2024-10-3154 min
AutocodeDavid L Jones - EEVBlog and fun with old computersThe official podcast for the Australian Computer Museum Society (ACMS). David L Jones - EEVBlog and fun with old computers2020-12-1553 min