Differences

This shows you the differences between two versions of the page.

--- projects:picoatlas:picoatlasvii [2012/07/19 09:25] – created jcoxon
+++ projects:picoatlas:picoatlasvii [2012/11/23 19:33] (current) – [Flight 20/10/12] jcoxon
@@ Line 3: / Line 3: @@
 ===== Aim =====
   * Investigate longer duration pico flight
-    * Increase the operating time of the payload through the use of power saving and additional solar cells.
+  * Test 1.8v as a voltage for a flight.
-===== Design =====
+===== Components =====
-  * uAva board (Atmega328 + Ublox 6 GPS + RFM22b)
+  * pAva board (Ublox6, Atmega328, RFM22b all running at 1.8v)
-  * External power regulator MCP1700 LDO 3.3v
+  * 1xAA Energizer lithium
-  * 2 x AAA Lithium energizers through a NCP1402 Step Up
+  * 1/4 wave antenna with 2 radials
-  * 2 x 3.6v 100mA Solar Panels through a diode
-<code>
+===== Flight 20/10/12 =====
-Li Energizer -------NCP1402----\
+Initially the aim was to launch multiple balloons however due to logistical problems we could only launch a Pico flight. The night before was spent finishing off the payload especially constructing the antenna and completing the code - one of the aims was to test the pAVA board and the code was purposely simple.
-                                \
-                                 ----MCP1700----- Payload
+{{:projects:picoatlas:picoatlas7flight.jpg?600|}}
-                                /
-Solar Panels -------Diode------/
+{{:projects:picoatlas:picoatlas7ascent.jpg|}}
-</code>
-With this setup during the day when the solar panels are outputing a higher voltage than 3.3v (from the NCP1402) then they'll be used to power the payload, as the sunsets and the solar panel output drops it'll switch to the lithium energizers for night time. During this time the payload will be in a power save setup where it'll transmit periodically.