PolyCraft/kiln-controller
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-removed specifics about how my ssr was wired (because there are lots of ways to do this)

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jbruce 2019-01-09 16:49:01 -05:00
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@ -39,7 +39,7 @@ Turns a Raspberry Pi into an inexpensive, web-enabled kiln controller.
The pi has three gpio pins connected to the MAX31855 chip. D0 is configured as an input and CS and CLK are outputs. The signal that controls the solid state relay starts as a gpio output which drives a transistor acting as a switch in front of it. This transistor provides 5V and plenty of current to control the ssr. Since only four gpio pins are in use, any pi can be used for this project. See the [config](https://github.com/jbruce12000/kiln-controller/blob/master/config.py) file for gpio pin configuration.
My controller plugs into the wall, and the kiln plugs into the controller. Only a single hot leg is switched by the SSR. The other hot leg, neutral, and ground are all pass through without modification.
My controller plugs into the wall, and the kiln plugs into the controller.
![Image](https://github.com/jbruce12000/kiln-controller/blob/master/public/assets/images/schematic.png)