Timeline for Is it proper to use an internal layer as a heat bed if I want to warm my multilayer PCB?
Current License: CC BY-SA 3.0
8 events
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| Jul 3, 2015 at 7:49 | comment | added | Asmyldof | @Guill if you wrap it in two ground planes properly with grounded copper around the heater traces, PWM will be no issue. If you smooth the PWM even less so. If you have the PCB in even slightly changing environs fixed energy is going to be biting you, especially if you have more than just simple small packages. | |
| Jul 3, 2015 at 5:16 | comment | added | Guill | I would not recommend PWM-ing the heater, you would be inducing all kinds of electrical noise into your circuits. You need to calculate the amount of energy you need to maintain a given PCB temperature and apply a small DC for a very long time, to provide that energy. | |
| Jun 26, 2015 at 13:34 | comment | added | JRE | @billyzhao Translating Asmyldof's answer: "Yes, and here are some ideas how to make it better and avoid some possible problems." | |
| Jun 26, 2015 at 12:01 | comment | added | billyzhao | So do you mean my idea is practical? | |
| Jun 26, 2015 at 10:51 | comment | added | Asmyldof | @NickJohnson Which you can do by the current you force, indeed, but it'd be a compound average effect over the length, unless you localise the heat production. That also has advantages if you can sacrifice a couple of extra pins on a controller, to allow you to locally heat more or less. | |
| Jun 26, 2015 at 10:38 | comment | added | Nick Johnson | Nice idea using the traces as sensors - you can even combine the two and measure the resistance of the heating traces to determine how hot they are. | |
| Jun 26, 2015 at 10:22 | history | edited | Asmyldof | CC BY-SA 3.0 |
added 462 characters in body
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| Jun 26, 2015 at 10:14 | history | answered | Asmyldof | CC BY-SA 3.0 |