Differences

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--- projects:blinker:work_logs:9_resin_casting [2022/04/18 00:19] – tjhowse
+++ projects:blinker:work_logs:9_resin_casting [2022/04/18 05:02] (current) – tjhowse
@@ Line 6: / Line 6: @@
 ===== The Plan =====
-I wanted to run a medium-duration test of the electrically-complete blinker before going through all the trouble and expense of encasing it in aluminium and glass. I decided to cast the electronics in transparent resin. This would be reasonably mechanically and chemically robust, but it would degrade in sunlight over a few years, turning yellow and crumbling. This would give me a test good enough to check for any drastic short-term problems with the electronics.
+I wanted to run a medium-duration test of the electrically-complete blinker before going through all the trouble and expense of encasing it in aluminium and glass. I decided to cast the electronics in transparent resin. This would be reasonably mechanically and chemically robust, but it would degrade in sunlight over a few years, turning yellow and crumbling. However this would be a reasonable test for any drastic short-term problems with the electronics.
 ===== The Results =====
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 Not too bad!
-I was reasonably happy with this result. There is some white discolouration on the solar cells visible in that photo. That discolouration wasn't present when I took the panel out of the mould. It formed shortly after I put it in the sun for this test. It seems to have been formed by some combination of:
+I was reasonably happy with this result. There is some grey discolouration on the solar cells visible in that photo. That discolouration wasn't present when I took the panel out of the mould. It formed shortly after I put it in the sun for this test. It seems to have been formed by some combination of:
   * UV radiation,
@@ Line 46: / Line 46: @@
 This seemed to indicate that the voltage limit was related to the temperature of the panel. Part of the way through this test the panel fell into shade, probably at the inflection point at 2710 seconds.
+I built a new blinker with two 35F supercaps attached and ran another test.
+{{:projects:blinker:work_logs:pasted:20220418-050227.png}}
+Looking good!
 ==== Failure ====