From ffb7f9adbf40e332d750b913a82e61de7db2286b Mon Sep 17 00:00:00 2001
From: Richard Eoin Meadows <richardeoin@gmail.com>
Date: Mon, 1 Sep 2014 11:54:25 +0100
Subject: [PATCH] Flight notes for UBSEDS2

---
 Flights.md | 18 ++++++++++++++++++
 Notes.md   |  7 +++++++
 2 files changed, 25 insertions(+)
 create mode 100644 Flights.md
 create mode 100644 Notes.md

diff --git a/Flights.md b/Flights.md
new file mode 100644
index 0000000..cfd0f2b
--- /dev/null
+++ b/Flights.md
@@ -0,0 +1,18 @@
+## UBSEDS2
+
+Launched from EMF 31/08/2014. Joint flight with CUSF (JOEY rtty/turbo)
+and SUSF (UKHAS repeater).
+
+AAA battery and surgically attached 16MHz crystal. Measured 80mA
+current draw, no power saving for the ublox 6.
+
+Revision C Atmel SAM D20 microcontrollor (bit-banged SPI)
+
+140g free lift on a 100g Hwoyee.
+
+4 hours battery life, much less than expected. Low temperatures?
+
+Watchdog enabled, 64 seconds timeout (based on ULP32k oscillator, so
++-50%)
+
+
diff --git a/Notes.md b/Notes.md
new file mode 100644
index 0000000..45055db
--- /dev/null
+++ b/Notes.md
@@ -0,0 +1,7 @@
+## PCB Weight ##
+
+The density of FR4 is 1,850 kg/m^3. If we assume a PCB area of 12*50 =
+600 mm^2...
+
+For a 1.0mm PCB: 600 * 1.0 * 1.85 = 1.110g
+For a 1.6mm PCB: 600 * 1.6 * 1.85 = 1.728g