EEVblog on Odysee

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

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 #Mailbag
...
https://www.youtube.com/watch?v=FyTRrPWWF2s

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/

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

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/

Web Site: http://www.eevblog.com
Hardware Store: https://eevblog.store/
Merch Store: https://eevblog.dashery.com/

If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog
Or with crypto:
BTC: 33BsprBQNBtHuVzVwDmqWkpDjYnCouwASM
ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c
BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4
USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c
LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF

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#ElectronicsCreators #Repair #Battery
...
https://www.youtube.com/watch?v=KqlHjIVyzOA

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
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
ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c
BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4
USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c
LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF

Other channels:
EEVblog2: http://www.youtube.com/EEVblog2
EEVdiscover: https://www.youtube.com/eevdiscover

#ElectronicsCreators #multimeter #reverseengineering
...
https://www.youtube.com/watch?v=8GLL6P662Fo

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

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

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...

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

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
ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c
BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4
USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c
LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF

Other channels:
EEVblog2: http://www.youtube.com/EEVblog2
EEVdiscover: https://www.youtube.com/eevdiscover

#ElectronicsCreators #Repair #SMD
...
https://www.youtube.com/watch?v=Q4tcpHrTSP0

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

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
ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c
BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4
USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c
LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF

Other channels:
EEVblog2: http://www.youtube.com/EEVblog2
EEVdiscover: https://www.youtube.com/eevdiscover

#ElectronicsCreators
...
https://www.youtube.com/watch?v=c_mmVFMXFQo