Heatsinks - Revision history

ViciousCarnivore: /* Submerging an SBC in Oil */

2026-08-11T06:27:05Z

Submerging an SBC in Oil

ViciousCarnivore: /* Submerging an SBC in Oil */

2026-08-11T06:26:40Z

Submerging an SBC in Oil

ViciousCarnivore: /* Tips/Techniques */

2026-08-11T06:26:28Z

Tips/Techniques

ViciousCarnivore: /* Submerging a PCB in Oil As a Heatsink */

2026-08-11T06:25:57Z

Submerging a PCB in Oil As a Heatsink

ViciousCarnivore: /* Submerging a PCB in Oil As a Heatsink */

2026-08-11T06:25:14Z

Submerging a PCB in Oil As a Heatsink

ViciousCarnivore: /* Poor TO-220 Heatsinking */

2026-08-11T06:24:07Z

Poor TO-220 Heatsinking

ViciousCarnivore: /* Poor TO-220 Heatsinking */

2026-08-11T06:22:48Z

Poor TO-220 Heatsinking

ViciousCarnivore: /* Theory */

2026-08-11T06:22:35Z

Theory

ViciousCarnivore: /* Poor TO-220 Heatsinking */

2026-08-11T06:22:20Z

Poor TO-220 Heatsinking

ViciousCarnivore: /* Submerging a PCB in Oil As a Heatsink */

2026-08-11T06:21:47Z

Submerging a PCB in Oil As a Heatsink

@@ Line 17: / Line 17: @@
 ==Tips/Techniques==
 ===Submerging an SBC in Oil===
-I have seen this at an expo (picture below). I've already fried (no pun intended) an RPI by not paying attention to ESD though, so I don't want to inadvertently break one by putting it in an oil bath. This sounds like one of the things that you don't want to test unless you really know what you are doing.
+I have seen this at an expo (picture below). I've already fried (no pun intended) an RPI by not paying attention to ESD though, so I don't want to inadvertently break one by putting it in an oil bath. This sounds like one of the things that you don't want to test unless you  know what you are doing.
 <gallery>
 File:SBC in Oil.jpg|RPI Running in Oil.

@@ Line 17: / Line 17: @@
 ==Tips/Techniques==
 ===Submerging an SBC in Oil===
 I have seen this at an expo (picture below). I've already fried (no pun intended) an RPI by not paying attention to ESD though, so I don't want to inadvertently break one by putting it in an oil bath. This sounds like one of the things that you don't want to test unless you really know what you are doing.
 <gallery>
 File:SBC in Oil.jpg|RPI Running in Oil.
 </gallery>
 [[Category:online notes]]

@@ Line 16: / Line 16: @@
 ==Tips/Techniques==
-===Submerging a PCB in Oil As a Heatsink===
+===Submerging an SBC in Oil===
 * https://hackaday.com/2018/08/13/oil-immersed-raspberry-pi-keeps-its-cool-under-heavy-loads/

@@ Line 17: / Line 17: @@
 ==Tips/Techniques==
 ===Submerging a PCB in Oil As a Heatsink===
 <gallery>
 File:SBC in Oil.jpg|RPI Running in Oil.
 </gallery>
 [[Category:online notes]]

@@ Line 18: / Line 18: @@
 ===Submerging a PCB in Oil As a Heatsink===
 <gallery>
-File:SBC in Oil.jpg|RPi Running in Oil.
+File:SBC in Oil.jpg|RPI Running in Oil.
 </gallery>
 * https://hackaday.com/2018/08/13/oil-immersed-raspberry-pi-keeps-its-cool-under-heavy-loads/

@@ Line 6: / Line 6: @@
 ==Theory==
 ===Poor TO-220 Heatsinking===
-I repaired an audiophile power supply, with loose to-220's underneath the board. They were loosely hanging over a sil pad and then not really making contact with the bottom of the chassis. This is of course, the wrong way to heatsink TO-220's. Given that the majority of the power was to go through these transistors, this was a bad design choice. While there are stand up heatsinks, which you see most of the time, there are also board mount heatsinks, where you will bend the TO-220 90 degrees, and then screw it into a heatsink, and into the board (optionally with sil pad). See the photos.
+I repaired an audiophile power supply, with loose to-220's underneath the board. They were loosely hanging over a sil pad and then not really making contact with the bottom of the chassis. This is of course, the wrong way to heatsink TO-220's. Given that the majority of the power was to go through these transistors, this was a bad design choice. While there are stand up heatsinks, which you see most of the time, there are also board mount heatsinks, where you will bend the TO-220 90 degrees, and then screw it into a heatsink, and into the board (optionally with sil pad).
 <gallery>
 File:Boardmount heatsink.jpg|These heatsinks can have the TO-220 bended on them, and the heatsink bolted to the board. It's also possible to get a top cover for these (a separate piece of metal, or connected to the original as a type of clamp). Some of these, will apply a bit of pressure (on the top half) to make good contact. Essentially sandwiching the case to the heatsink.

@@ Line 7: / Line 7: @@
 ===Poor TO-220 Heatsinking===
 <gallery>
-[[File:Boardmount heatsink.jpg|These heatsinks can have the TO-220 bended on them, and the heatsink bolted to the board. It's also possible to get a top cover for these (a separate piece of metal, or connected to the original as a type of clamp). Some of these, will apply a bit of pressure (on the top half) to make good contact. Essentially sandwiching the case to the heatsink.]]
+File:Boardmount heatsink.jpg|These heatsinks can have the TO-220 bended on them, and the heatsink bolted to the board. It's also possible to get a top cover for these (a separate piece of metal, or connected to the original as a type of clamp). Some of these, will apply a bit of pressure (on the top half) to make good contact. Essentially sandwiching the case to the heatsink.
-[[File:Bottom board 1.jpg|Loose TO-220's. What isn't shown here is how the chassis was essentially supposed to make contact with these by virtue of them being 'sort of close'. Because there was no screw or bolt to hold them in, they were hanging and had an air gap.]]
+File:Bottom board 1.jpg|Loose TO-220's. What isn't shown here is how the chassis was essentially supposed to make contact with these by virtue of them being 'sort of close'. Because there was no screw or bolt to hold them in, they were hanging and had an air gap.
 File:Boardmount heatsink2.jpg|Here is an example of the clamping type of heatsink, though there are others where the two pieces are separate.
 </gallery>