Added licence, readme and image.

LICENSE

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+Copyright 2024 Commander1024
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# PDU power sequence
+
+Simple Arduino sketch, that turns on a pair of relay modules.
+I hacked this together to prevent over-loading the fuses when turning on the
+home cinema from the smart plug.
+
+It waits a configurable amount of time (2 seconds), turns on power rail 1,
+waits 2 seconds, turns on power rail 2 and shuts itself off.
+
+I embedded an Arduino Nano, a mini PSU and the relay module into a 2x5 port
+passive PDU.
+
+**This project involves mains voltage. Caution is advised!**
+
+![alt text][pdu_assembly]
+[pdu_assembly]: images/pdu_assembly.jpg "PDU assembly"