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mission:resources:picoreflow [2015/01/29 09:40] – [Software] chrono | mission:resources:picoreflow [2016/10/27 22:33] (current) – [Heating] chrono | ||
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More and more semiconductors are produced in packages (the chip's case) which have become impossible to hand solder with a solder iron. The switch from through-hole (THT) to surface mount technology (SMT) has actually made hand soldering much easier (although still many believe the opposite to be true) but now we are faced with BGA and other packaging forms which only have contacts on the bottom of the chip. | More and more semiconductors are produced in packages (the chip's case) which have become impossible to hand solder with a solder iron. The switch from through-hole (THT) to surface mount technology (SMT) has actually made hand soldering much easier (although still many believe the opposite to be true) but now we are faced with BGA and other packaging forms which only have contacts on the bottom of the chip. | ||
- | In order to be able to work with these chips, a reflow solder process is needed. So we've built our own DIY reflow oven, using a Raspberry Pi as a universal, web enabled, PID Reflow Oven Controller driving a convectional hot air oven originally designated for gastronomy/ | + | In order to be able to work with these chips, a reflow solder process is needed. So we've built our own DIY reflow oven, using a Raspberry Pi as a universal, web enabled, PID Reflow Oven Controller driving a convectional hot air oven originally designated for gastronomy/ |
+ | |||
+ | Since it's all open-source you may also use it to build a kiln controller, | ||
<WRAP round alert> | <WRAP round alert> | ||
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==== Heating ==== | ==== Heating ==== | ||
+ | |||
+ | === Load Wiring === | ||
+ | |||
+ | {{: | ||
+ | |||
+ | === Signal Wiring === | ||
SSR connected to P1-23 | SSR connected to P1-23 | ||
+ | ^ PullDown Connection (default) ^ PullUp Connection (alternative) ^ | ||
+ | | {{: | ||
+ | |||
+ | |||
+ | The default configuration has historically been to use the PullDown config, which results in an inverted control logic: When you pull GPIO23 low, the heater is switched on and when you pull GPIO23 high, the heater is switched off. | ||
+ | |||
+ | <WRAP round important> | ||
+ | **Please keep in mind that you'll have to have some script/code in your setup that makes sure that GPIO23 is pulled high as soon as the system has booted** (to be sure the heater is off) or change your setup to PullUp configuration instead, if you don't want to worry/ | ||
+ | </ | ||
==== Cooling ==== | ==== Cooling ==== | ||
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===== Software ===== | ===== Software ===== | ||
- | The picoReflow | + | <WRAP round info> |
+ | **Although | ||
+ | |||
+ | With the help of a lot of people | ||
+ | With the switch to angular/ | ||
+ | * https:// | ||
+ | * Rough Dev-Notes on https:// | ||
+ | * Make sure to check-in again and/or subscribe the [[https:// | ||
+ | |||
+ | **Screenshots of new the interface (Profile-Editor)** | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | </ | ||
==== Dependencies ==== | ==== Dependencies ==== | ||
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T_h = T_h_old + \Delta T_h1 + \Delta T_h2 | T_h = T_h_old + \Delta T_h1 + \Delta T_h2 | ||
</x> | </x> | ||
+ | |||
+ | |||
+ | ===== picoReflow in the Wild ===== | ||
+ | |||
+ | This project already has inspired a couple of people who are using this concept and free software stack for their own purposes: | ||
+ | |||
+ | ==== DIY Reflow Toaster ==== | ||
+ | |||
+ | {{: | ||
+ | {{ : | ||
+ | |||
+ | * http:// | ||
+ | * The domain seems to have gone offline, there is [[https:// | ||
+ | |||
+ | ==== Ararpi Reflow Oven ==== | ||
+ | |||
+ | {{: | ||
+ | |||
+ | http:// | ||
+ | |||
+ | ==== Moore Bros Composite Oven ==== | ||
+ | |||
+ | {{: | ||
+ | |||
+ | A custom built oven to bake carbon composite parts. | ||
+ | |||
+ | ==== WiFi/ | ||
+ | |||
+ | {{: | ||
+ | |||
+ | http:// | ||
+ | |||
{{tag> | {{tag> |