NO SCRIPT, NO FEAR, ALL OPINION An off-the-cuff Video Blog about Electronics Engineering, for engineers, hobbyists, enthusiasts, hackers and Makers Hosted by Dave Jones from Sydney Australia DONATIONS: Bitcoin: 3KqyH1U3qrMPnkLufM2oHDU7YB4zVZeFyZ Ethereum: 0x99ccc4d2654ba40744a1f678d9868ecb15e91206 PayPal: david@alternatezone.com Patreon: https://www.patreon.com/eevblog EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/channel/UCkGvUEt8iQLmq3aJIMjT2qQ EMAIL: Advertising/Commercial: eevblog+business@gmail.com Fan mail: eevblog+fan@gmail.com Hate Mail: eevblog+hate@gmail.com I DON'T DO PAID VIDEO SPONSORSHIPS, DON'T ASK! PLEASE: Do NOT ask for personal advice on something, post it in the EEVblog forum. I read ALL email, but please don't be offended if I don't have time to reply, I get a LOT of email. Mailbag PO Box 7949 Baulkham Hills NSW 2153 AUSTRALIA
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Can you Muntz the new Microsoft Azure Majorana 1 Topological Quantum Computer chip with Topocondunctors announced today?
https://news.microsoft.com/azure-quantum/
https://www.unsw.edu.au/newsroom/news/2025/01/quantum-computing-schroedingers-cat-silicon-chip
Muntzing video: https://www.youtube.com/watch?v=P8MpZGjwgR0
Quantum lab tour: https://www.youtube.com/watch?v=fIEH4-P2nyQ
In depth quantum computing discussion: https://www.youtube.com/watch?v=jDW9bWSepB0
Forum: https://www.eevblog.com/forum/blog/eevblab-124-microsoft-majorana-1-quantum-computer/
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#ElectronicsCreators #quantumcomputing #Microsoft
A mailbag replacement custom LED display for the Agilent 53131A VFD display frequency counter.
www.hubequip.net
Oven oscillator upgrade: https://www.youtube.com/watch?v=KmZwAjmzHx8
Playlist of related videos! https://www.youtube.com/playlist?list=PLvOlSehNtuHupdUJVYdRnihTTQ_Tw7MHt
Forum thread on the display: https://www.eevblog.com/forum/testgear/hp-agilent-53131a-53132a-vfd-to-led-conversion/
Forum: https://www.eevblog.com/forum/blog/eevblog-1669-agilent-u53131a-vfd-to-led-display-upgrade-mailbag/
How VFD Displays work: https://www.youtube.com/watch?v=gZIRPJt69sM
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#ElectronicsCreators #Mailbag
Horrific 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/
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#ElectronicsCreators #Repair #Battery
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.
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
Web Site: http://www.eevblog.com
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#ElectronicsCreators #multimeter #reverseengineering
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: https://www.youtube.com/playlist?list=PLvOlSehNtuHtdQF-m5UFZ5GEjABadI3kI
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#ElectronicsCreators #Repair #SMD
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 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.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/
How VFD Displays Work: https://www.youtube.com/watch?v=gZIRPJt69sM
Hacking a VFD Display: https://www.youtube.com/watch?v=clUVEyi_YNM
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#ElectronicsCreators
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: 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 16x2 VFD display
15:03 - Potential replacement LCD
16:38 - Identical replacement found
17:44 - Lets check the junk bin...
18:33 - Pinout trap for young players
19:25 - First test FAIL, but hold on a second, lets try something...
21:09 - Winner Winner Chicken Dinner
22:12 - WOAH, now it's not working?
24:09 - Lets try THIS...
Web Site: http://www.eevblog.com
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#ElectronicsCreators #Repair #keithley
I'd really appreciate if you could fill in the 2025 viewer survey and tell me what you like and don't like about the channel, and what changes I can make. It is ANONYMOUS unless you want to enter the giveaway.
LINK:
https://docs.google.com/forms/d/e/1FAIpQLSdLeQRdLRmbwyLT4yn4d9BZU3kzxjOoFAq-XpqS4g8VL1hXpw/viewform?usp=dialog
I will be giving away three new BM2257 multimeters to random people who fill it out. Thanks.
Forum: https://www.eevblog.com/forum/blog/2025-eevblog-viewer-survey-and-giveaway/
Web Site: http://www.eevblog.com
Hardware Store: https://eevblog.store/
Merch Store: https://www.teepublic.com/stores/eevblog?ref_id=37825
If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog
Or with crypto:
BTC: 33BsprBQNBtHuVzVwDmqWkpDjYnCouwASM
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#ElectronicsCreators #Survey
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.
Keysight OLED meter repair: https://www.youtube.com/watch?v=CKdeqqo2diI
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 meter
17:00 - Cleaning the input jacks
19:11 - Heating up the input jacks
20:18 - Getting desperate, removing the input jacks
21:49 - Getting really desparate, removing the input resistors
22:38 - Reassembling the original repaired unit
24:26 - Repaired BM786 GIVEAWAY
Forum: https://www.eevblog.com/forum/blog/eevblog-1663-bm786-multimeter-repair-iner-error-investigation/
Web Site: http://www.eevblog.com
Hardware Store: https://eevblog.store/
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If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog
Or with crypto:
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#ElectronicsCreators #Repair #Brymen
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 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
Web Site: http://www.eevblog.com
Hardware Store: https://eevblog.store/
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If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog
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#ElectronicsCreators #Tandy #VintageComputer
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