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YouTube Video Episodes / A Look Inside #19 - Harmon 4200B Selective Voltmeter - Fix/Repair - PT3

« Last post by SeanB on April 25, 2025, 07:24:09 PM »

A Look Inside #19 - Harmon 4200B Selective Voltmeter - Fix/Repair - PT3

https://www.youtube.com/watch?v=XjG5dkBeCL8

Pt 1

https://www.youtube.com/watch?v=P614i6uTfqk

Pt 2

https://www.youtube.com/watch?v=abk_cnfQcko

At look at the Harmon 4200B Selective Voltmeter, it's operation, fixing issues.

History on the Harmon Industries company:
https://www.encyclopedia.com/books/politics-and-business-magazines/harmon-industries-inc

PCB History:
https://how2electronics.com/history-printed-circuit-board-pcb-nextpcb/

Harmon 4200A Selective Voltmeter Instruction Manual - April 1974:
https://www.scribd.com/document/288855591/Harmon-4200A-Selective-Voltmeter-Instruction-Manual-April-1974

** Programming Electronics Academy **
Sign-Up below to join over 20,000 awesome people to learn from our Arduino Crash Course - it's 12 optimized video lessons to get you up and running quick with Arduino.

https://www.programmingelectronics.com/mjlorton/?orid=12382

YouTube Video Episodes / T4D #161 - General Chit Chat and Updates on Videos

« Last post by SeanB on April 25, 2025, 07:21:21 PM »

T4D #161 - General Chit Chat and Updates on Videos

https://www.youtube.com/watch?v=NfDFNmts3DY

In this video: A quick catch-up!!!

YouTube Video Episodes / A Look Inside #19 - Harmon 4200B Selective Voltmeter - Fix/Repair

« Last post by SeanB on April 06, 2025, 04:13:06 PM »

A Look Inside #19 - Harmon 4200B Selective Voltmeter - Fix/Repair

Pt 1

https://www.youtube.com/watch?v=P614i6uTfqk

Pt 2

https://www.youtube.com/watch?v=abk_cnfQcko

At look at the Harmon 4200B Selective Voltmeter, it's operation, fixing issues.

History on the Harmon Industries company:
https://www.encyclopedia.com/books/politics-and-business-magazines/harmon-industries-inc

PCB History:
https://how2electronics.com/history-printed-circuit-board-pcb-nextpcb/

Harmon 4200A Selective Voltmeter Instruction Manual - April 1974:
https://www.scribd.com/document/288855591/Harmon-4200A-Selective-Voltmeter-Instruction-Manual-April-1974

** Programming Electronics Academy **
Sign-Up below to join over 20,000 awesome people to learn from our Arduino Crash Course - it's 12 optimized video lessons to get you up and running quick with Arduino.

https://www.programmingelectronics.com/mjlorton/?orid=12382
https://www.programmingelectronics.co...

YouTube Video Episodes / T4D #160 - Electric Screwdriver Follow-up, D-Central Tech News/Issues and Antmi

« Last post by SeanB on February 04, 2025, 05:07:33 AM »

T4D #160 - Electric Screwdriver Follow-up, D-Central Tech News/Issues and Antminer S9 PSU Repair.

https://www.youtube.com/watch?v=mHeLBiH3a48

In this video:

Follow up on the electric screwdriver review...my pencil grip and the Fanttik operation / specifications.
Some news / points of concern about D-Central Tech
I chat about changing parts / ASICs on the Antminer S9 and what to look out for.
A "quick" look inside an Antminer S9 power supply to repair an issue with the fan.

Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv

YouTube Video Episodes / Electric Screwdriver Considerations / Review

« Last post by SeanB on January 16, 2025, 05:05:19 AM »

Electric Screwdriver Considerations / Review Part 1

https://www.youtube.com/watch?v=3FkiPcO1gN8

Electric Screwdriver Considerations / Review - Part 2

https://www.youtube.com/watch?v=YRZyBpt1Rho

In this video: I take a look at six electric / electronic screwdrivers to understand how well they work in comparison to a manual precision screwdriver. Torque and speed control are evaluated.
1: Fanttik E1 Max 3.7V Mini Electric Screwdriver
https://www.amazon.com/gp/product/B0CQX9ZFKF

2: HOTO Electric Screwdriver Tool Set
https://www.amazon.com/gp/product/B0C4XQ617S

3: KAIWEETS 70-in-1 Mini Electric Screwdriver
https://www.amazon.com/gp/product/B0CSXTW6LM

4: AM ARROWMAX 7.4V Mini Electric Screwdriver
https://www.amazon.com/gp/product/B0DC61X5D3

5: AM ARROWMAX Electric Screwdriver (SES PRO)
https://www.amazon.com/gp/product/B0CHRRCN8F

6: Original MINIWARE ES15S Mini Electric Power Screwdriver
https://www.amazon.com/gp/product/B07952N5PH

Click the Amazon link to help pay for the channel: http://astore.amazon.com/m0711-20

Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv

YouTube Video Episodes / DIY Bitcoin Miner Heater - Part 2

« Last post by SeanB on December 29, 2024, 02:54:08 AM »

DIY Bitcoin Miner Heater - Part 2

https://www.youtube.com/watch?v=laIkODj8Vkc

I go through the build process and economics of building and configuring your own Bitcoin Mining Heater.
In this build I use a Bitmain Antminer S9, a D-Central enclosure and Nocuta silent fans.

Antminer S9 Space Heater Edition:

https://d-central.tech/product/bitmain-antminer-s9/

Bitmain Antminer S9:

https://d-central.tech/product/bitmain-antminer-s9/

D-Central.TECH - Bitcoin Antminer Space Heater DIY Case :

https://www.amazon.com/D-Central-TECH-Antminer-Space-Heater-Energy-Efficient/dp/B0CFYPFDN6

D-Cental Mining ASICs and Mining heaters:

https://d-central.tech/product-category/asic-miners/

BitChimney Space Heater:

https://altairtech.io/product/bitchimney/

The Urlacher - Modified S19k, that runs on 120V! :

https://altairtech.io/product/urlacher/

Canaan Avalon Nano 3 Bitcoin miner / space heater:

https://altairtech.io/product/nano3/

S9 Bitcoin Space Heater Case:

https://www.cryptocloaks.com/product/s9-space-heater-case-bitcoin/

Noctua NF-A14x25 G2 PWM, Premium-Quality Quiet 140mm Fan:

https://www.amazon.com/Noctua-NF-A14x25-G2-PWM-Premium-Quality/dp/B0DDY14DQD/

Bgears Fan Adapter 140mm to 120mm -Black :

https://www.amazon.com/dp/B0043GMY1U/

140mm Black Fan Grill/Guard with Screws (2 Pack):

https://www.amazon.com/dp/B01M2YI7BM/

Inkbird ITC-308 Digital Temperature Controller 2-Stage Outlet Thermostat:
https://www.amazon.com/gp/product/B01HXM5UAC/

My Techie Amazon Store: https://astore.amazon.com/m0711-20

Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv

YouTube Video Episodes / T4D #159 - End Of Year 2024 Chit Chat

« Last post by SeanB on December 25, 2024, 08:17:36 AM »

T4D #159 - End Of Year 2024 Chit Chat

https://www.youtube.com/watch?v=snpWbbcp664

In this video:
A quick catch-up on what's been going on in the last few months and how heavy rains from Helene caused a fair amount of chaos.

YouTube Video Episodes / DIY Bitcoin Miner Heater - Part 1

« Last post by SeanB on December 19, 2024, 12:12:28 PM »

DIY Bitcoin Miner Heater - Part 1

https://www.youtube.com/watch?v=fQ2sSgLawpM

In this video:
I go through the build process and economics of building and configuring your own Bitcoin Mining Heater.
In this build I use a Bitmain Antminer S9, a D-Central enclosure and Nocuta silent fans.

Antminer S9 Space Heater Edition:

https://d-central.tech/product/bitmain-antminer-s9/

Bitmain Antminer S9:

https://d-central.tech/product/bitmain-antminer-s9/

D-Central.TECH - Bitcoin Antminer Space Heater DIY Case :

https://www.amazon.com/D-Central-TECH-Antminer-Space-Heater-Energy-Efficient/dp/B0CFYPFDN6

D-Cental Mining ASICs and Mining heaters:

https://d-central.tech/product-category/asic-miners/

BitChimney Space Heater:

https://altairtech.io/product/bitchimney/

The Urlacher - Modified S19k, that runs on 120V! :

https://altairtech.io/product/urlacher/

Canaan Avalon Nano 3 Bitcoin miner / space heater:

https://altairtech.io/product/nano3/

S9 Bitcoin Space Heater Case:

https://www.cryptocloaks.com/product/s9-space-heater-case-bitcoin/

Noctua NF-A14x25 G2 PWM, Premium-Quality Quiet 140mm Fan:

https://www.amazon.com/Noctua-NF-A14x25-G2-PWM-Premium-Quality/dp/B0DDY14DQD/

Bgears Fan Adapter 140mm to 120mm -Black :

https://www.amazon.com/dp/B0043GMY1U/

140mm Black Fan Grill/Guard with Screws (2 Pack):

https://www.amazon.com/dp/B01M2YI7BM/

Inkbird ITC-308 Digital Temperature Controller 2-Stage Outlet Thermostat:
https://www.amazon.com/gp/product/B01HXM5UAC/

My Techie Amazon Store: https://astore.amazon.com/m0711-20

Bitcoin (BTC) Donations: 1K7PeF55e7ssE7W3WVCoa7c4j2PHzy6ASv

YouTube Video Episodes / Winnebago Ekko Solar Fuse Melting

« Last post by SeanB on September 18, 2024, 06:13:15 AM »

Winnebago Ekko Solar Fuse Melting

https://www.youtube.com/watch?v=Sh41qLYat7s

In this video:
I simulate conditions in which the Winnebago Ekko solar charge controller fuse might be exposed to, to see if it will melt...

https://www.youtube.com/watch?v=x2IAmRDhhCE

NHTSA Safety Recall 24V-541 on the Winnebago Ekko (Ford and Mercedes Sprinter 2021-2025)

YouTube Video Episodes / Winnebago Ekko Recall, Fire Risk, Solar Fuse Melting - NHTSA Safety Recall 24V-5

« Last post by SeanB on September 09, 2024, 03:34:39 AM »

Winnebago Ekko Recall, Fire Risk, Solar Fuse Melting - NHTSA Safety Recall 24V-541 (2021-2025)

https://www.youtube.com/watch?v=x2IAmRDhhCE

n this video:
A look at NHTSA Safety Recall 24V-541 on the Winnebago Ekko (Ford and Mercedes Sprinter 2021-2025)
A go through fixing this yourself if you have the skills. I demonstrate the risk of how the fuse and fuse holder could catch fire. I talk about using a safe circuit breaker. I demonstrate and explain how a hydraulic magnetic circuit breaker works.

https://www.nhtsa.gov/recalls?nhtsaId=24V541

https://www.carlingtech.com/circuit-protection

Why do Fuse Holders Melt?:
https://www.youtube.com/watch?v=hAYHeWaT_-k

Polarised Solar DC Circuit Breakers - Reverse Polarity
https://www.youtube.com/watch?v=Oaq2cvoPBRk

https://dc-components.com/wp-content/uploads/CBI-Hydraulic-Magnetic-Circuit-Breakers-Guide.pdf

Blue Sea Systems A-Series Toggle Single Pole Circuit Breakers:
https://www.amazon.com/dp/B000MMDM06