I revised the internal switch mechanism by narrowing the wire-routing block and moving the zip-tie block back into place. I extended the low-voltage wiring groove, reduced the high-voltage wire diameter, and added a new variable for routing bare wires within shrink tube. I also added angled holes to the front peg and eliminated zip-tie fastening points to secure the wires, but I cannot test it yet.
I received the parts for the external switch component and replaced the aluminum spacers with a cut brass tube for 5mm-tall spacers. After soldering the switch to the brass segments and testing it successfully, I ran into an issue where sparks wanted to pass through the brass bolts on the underside of the interior switch component. The important thing was that the parts and circuit worked.
I was nervous about cutting my aluminum bar stock since metalworking is not my forte, and I worried about messing it up. After cutting a 45° section and rounding the edges with a hacksaw and metal rasp, I checked the fit against my printed blade sheath and marked the hole locations. The assembly went smoothly, and I only needed a few adjustments to make the internal switch and the tang mate up properly. When I tested the knife on my arm, it delivered a strong shock, which made me consider adding a voltage regulator.
To prevent sparking inside the handle, I moved the high-voltage wires from the central internal switch to a couple of new prongs on the outside of the blades.
I printed a new tang and an internal switch, but they were too tight to fit. I updated the internal switch code so that, when I rendered it for subtraction from the tang, it included wiggle room. I printed a bladeless tang, and it fit the other piece smoothly.
Amanda hosted our discussion of The Day After Tomorrow (2004). Fred deemed it trash, but I enjoyed it once I lowered the bar and classified it as disaster porn. We acknowledged that despite its flaws, the film started discussions about climate change more than twenty years ago.
The rest of the summary posts have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
 |
| Innards ready |
I received the parts for the external switch component and replaced the aluminum spacers with a cut brass tube for 5mm-tall spacers. After soldering the switch to the brass segments and testing it successfully, I ran into an issue where sparks wanted to pass through the brass bolts on the underside of the interior switch component. The important thing was that the parts and circuit worked.
 |
| Assembled handle |
I was nervous about cutting my aluminum bar stock since metalworking is not my forte, and I worried about messing it up. After cutting a 45° section and rounding the edges with a hacksaw and metal rasp, I checked the fit against my printed blade sheath and marked the hole locations. The assembly went smoothly, and I only needed a few adjustments to make the internal switch and the tang mate up properly. When I tested the knife on my arm, it delivered a strong shock, which made me consider adding a voltage regulator.
 |
| If you look closely, you can see the light from a spark inside the handle |
To prevent sparking inside the handle, I moved the high-voltage wires from the central internal switch to a couple of new prongs on the outside of the blades.
 |
| Three-pronged connector modeled |
I printed a new tang and an internal switch, but they were too tight to fit. I updated the internal switch code so that, when I rendered it for subtraction from the tang, it included wiggle room. I printed a bladeless tang, and it fit the other piece smoothly.
 |
| Mating pieces |
Amanda hosted our discussion of The Day After Tomorrow (2004). Fred deemed it trash, but I enjoyed it once I lowered the bar and classified it as disaster porn. We acknowledged that despite its flaws, the film started discussions about climate change more than twenty years ago.
Critical Affection: The Day After Tomorrow (1:08)
The rest of the summary posts have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
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