From 8bacb24bac1437bfb66db5bda2592b8794f6ed26 Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <robin.haberkorn@googlemail.com>
Date: Sat, 15 May 2021 19:53:41 +0200
Subject: document how to build a solenoid driver and install a solenoid

* In contrast to the relay breakout board I was using before,
  the solenoid driver is HIGH-active, so some code had to be changed
  as well.
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 create mode 100644 pics/solenoid-driver.png

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diff --git a/pics/solenoid-driver.png b/pics/solenoid-driver.png
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index 0000000..1e6e412
Binary files /dev/null and b/pics/solenoid-driver.png differ
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