Differences

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--- mission:resources:picoreflow [2016-10-09 11:41] – [Heating] chrono
+++ mission:resources:picoreflow [2016-10-27 22:33] (current) – [Heating] chrono
@@ Line 87: / Line 87: @@
 ==== Heating ====
+=== Load Wiring ===
 {{:mission:resources:picoreflow-ssr-load-connection.png|}}
+=== Signal Wiring ===
 SSR connected to P1-23
+^ PullDown Connection (default) ^ PullUp Connection (alternative) ^
+| {{:mission:resources:picoreflow-ssr-signal-pulldown-connection.png?320|}} | {{:mission:resources:picoreflow-ssr-signal-pullup-connection.png?320|}} |
+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/bother.
+</WRAP>
 ==== Cooling ====
@@ Line 277: / Line 290: @@
 A custom built oven to bake carbon composite parts.
+==== WiFi/Raspberry Pi pottery kiln controller ====
+{{:mission:resources:kilnrunning.jpg|}}
+http://succulentceramics.com/2016/10/07/wifiraspberry-kiln-controller/
 {{tag>research lab reflow oven pid controller raspberry pi picofab software hardware}}