videos.trom.tf

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Attention: this instance is solely dedicated to science/technology/nature videos in English. Even the activism/education needs to fall into these categories. Anything else will be removed immediately.... more

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The podcast currently has 1,731 episodes available.

videos.trom.tf episodes:

June 01, 2025 Antique wall-mount telephone - generator and bell restoration
Again in my old lab, restoring a 1930s German wall mount telephone. Sadly, it lacks a handset... but the generator, bell and hook switch are still there, so I tried to get them to work. Shorting the line terminals allows the phone to ring its own bell!
0:00 Intro
0:20 Overview of the telephone
2:16 Exchanges, local and central battery systems
6:08 Bench time
28:00 Taking the generator out
30:48 Generator disassembly and cleaning
49:50 Generator reassembly
1:06:00 Testing the generator
1:07:45 It's alive!
1:10:00 Before I put the generator back in...
1:17:10 A little ASMR for you all
1:18:05 Bell disassembly
1:23:00 Bell cleaning
1:24:30 Bell reassembly
1:29:52 Generator and bell test
1:32:05 Putting the generator back in
1:32:28 Reassembly mistake
1:34:43 Putting the generator back in
1:42:00 Bell troubleshooting time
1:47:35 It's alive (again)
1:50:00 Rings a bell, miission accomplished!
1:44:44 "Keri on doing the Fran-tastic job..."
1:44:50 Crankiness!
1:56:20 Experimenting
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Telegram channel - https://t.me/KeritechElectronics
...more
0min
June 01, 2025 ADHD-01 Advanced Dial-Home Device Project
Doing something creative while channeling my inner Samantha Carter!
The ADHD-01 (Mark 1 Advanced Dial-Home Device) project is an unusual home automation controller using a rotary dial as an input device, and Nixie tubes for displaying the parameters and values. The project is moved from NodeMCU / ESP8266 to Raspberry Pi Pico W with a lot of code still to be done. The hardware as of now is working pretty nice - watch these lovely Nixies glow...
Contrary to what they say, resistance is NOT futile!
0:00 Intro
1:15 Unboxing
2:18 The Story Behind ADHD
4:07 Purpose and Pitfalls
7:26 Latched BCD Nixie Control
9:03 About These Nixies
10:45 RF Shielding Shenanigans
13:00 Further Discombobulation
17:20 Mechanical Modding
22:46 Pilot Lamp Fix
23:45 Interlude
24:40 Post-Rewire
26:40 Assembly
34:55 Launch!
Hackaday project page: https://hackaday.io/project/188537-advanced-dial-home-device
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
June 01, 2025 Hospital Loveliness! Statham Blood Pressure Monitor
Teardown, fireup and experimenting a vintage medical electronics device - the Statham SP-1401 blood pressure monitor used in hospitals. Impressive build quality, the true art of electronics... Will I get anything out of those Nixies? See for yourselves!
0:00 Intro
1:45 Pin Nuts
2:40 Use Case
4:38 PCB Design
6:15 Nameplate
6:44 Back Panel
7:26 Front Panel
11:00 Inside the Device
14:05 More Electronic Engineering Goodness!
14:49 Power Connections
15:45 Cannon Probe Connector
17:15 Hooking Up the Power
20:17 First Fireup!
20:45 Fiddling with Controls
24:15 Output/Input Disconnection Experiment
28:30 Looking for Signal Input
31:30 Experimenting!
40:00 Nothing Happens?
41:00 Oops! False Positive...
42:20 Got it!
43:10 Measurements
45:25 Board Investigation
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
June 01, 2025 Old Style Cable Lacing Techniques
Showing you a few cable lacing techniques, correct and incorrect. NASA, vintage, complete crap and what I used to do but NASA style proved better.
This video was inspired by The Digital Mermaid's one: https://www.youtube.com/watch?v=Bg2vh_X6MgM
ConnectionsMuseum also did one: https://www.youtube.com/watch?v=GTC_r9AIgdo
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
June 01, 2025 Thyratron Fun! AEG Time Relay Reverse Engineering
Time circuits set to 3 seconds in the future!
I got this AEG time relay from my friend and decided to show its interesting build and principle of operation. It uses a 150V voltage regulator (probably 0A2) and an unknown type thyratron (may be 5823), and interesting latching circuit on the main relay.
A thyratron is a gas-filled triggered tube which starts conducting after applying voltage to its ignition pin, and will keep concucting until the plate voltage drops below a certain threshold, in practice until power is disconnected. It's a glass-and-metal cousin of a SCR (semi-conductor relay) a.k.a. thyristor. Even the name is related.
0:00 Intro
1:10 Mysterious Device
2:20 Tubes
5:06 Teardown
6:20 Schematic and Principle of Operation
11:35 Fireup
14:23 Measurements
17:00 Afterword
I changed the thumbnail font BTW. Wondering how it affects the views, haha!
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
May 31, 2025 The Soviet S1-112A Oscilloscope / Meter Repair, part 1
Repair attempt of the portable oscilloscope & digital VOM combo made in the USSR. This unit is 31 years old, very nicely built. Unlike I first thought, he issue turned out to be the power switch rather than the cable. Taking a deep dive to replace it while dealing with some surprises! To be continued...
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Telegram channel - https://t.me/KeritechElectronics
...more
0min
May 31, 2025 Keritech Stream - Starship IFT-5 and Homemade Pizza Edition
Light the Candle... Again! And try to watch it while making some delicious pizza.
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics or via PayPal https://paypal.me/keritech
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
#ElectronicsCreators #Keritech #Electronics
...more
0min
May 31, 2025 2022 Channel Wrap-up
Keri and Koko the lab cat wishing you all the best for the upcoming year, talking about the good, the bad and the ugly things that happened in 2022 and may happen RealSoon. Evaluating the roadmap I had in mind when making this one: https://www.youtube.com/watch?v=aSMBGkiNiRM - some projects done, some still unfinished or unstarted.
Oh, and the Radioactivity Lamp... in the thumbnail.
0:00 Intro
0:55 Roadmap Recap
6:10 Hello, Kitty!
12:00 Channel and Patreon Support Progress
15:00 Videos Overview
18:00 Possible Changes in Livestream Schedule
19:00 Getting a Job? End of Keritech?
20:45 Rant!
17:30 SE-84LJ, Selectric and Soemtron
30:10 Bench Time with the Little Red Devil
35:25 New Year's Wishes and Thanks
Oh, and I forgot to mention that I got a tablet above the bench to serve as a remote control for OBS.
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
May 31, 2025 The Story of the Little Red Devil
The story of how I made the Little Red Devil. Design challenges, the materials, enclosure, joining the new and old technologies... Koko the lab cat is clearly interested!
0:00 Intro / Enclosure
2:50 Output Transformers
4:55 Enclosure Design
6:35 Sub-Chassis and Internal Assembly
8:20 Panels
10:38 The Booth and Top Assembly
11:40 Another Reason for Sub-Chassis
12:46 Future Projects?
13:20 Clumsy Girl!
14:22 Breadboard
15:45 Remote Control Circuit
17:50 RC Programming
19:35 Programming Mode, No Holes
21:00 Magnet / Reed Switch Programming Mode
22:25 Microcontroller Shenanigans
23:26 Power Supply
24:35 PSU Enclosure
25:55 Power Transformers
26:46 LVDC Supply and the Heating
Overview and final assembly video: https://www.youtube.com/watch?v=5uF7lBHm4JI
Little Red Devil on Hackaday: https://hackaday.io/project/188931-keritech-little-red-devil-single-ended-el84-amp
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Hackaday - https://hackaday.io/keritech
...more
0min
May 31, 2025 The Soviet S1-112A Oscilloscope / Meter Repair, part 2
Why was the pilot lamp flickering? How is the power supply designed? And finally... is it gonna work?
Support me on my Patreon page at https://www.patreon.com/KeritechElectronics
Instagram - https://www.instagram.com/KeriSzafir
Telegram channel - https://t.me/KeritechElectronics
Hackaday - https://hackaday.io/keritech
...more
0min

FAQs about videos.trom.tf:

How many episodes does videos.trom.tf have?

The podcast currently has 1,731 episodes available.