+# TeleMetrum Units
+
+This page contains Bdale's notes about each unit of [TeleMetrum](..)
+assembled to date.
+
+## sn 1 ##
+
+Full load of v0.1 PCB, two cuts and jumps to rewire P1_2 to be SPI memory
+chip select, R14 and R15 loaded with 56k, 10k tacked from each to
+ground. R17 replaced with short circuit, R18 removed.
+
+Installed in Bdale's Vertical Assault. First unit to be flown on
+2009.04.19, on a Cesaroni J335.
+
+Successfully flew Bdale's rebuilt Horizon dual-deploy at Hudson Ranch on
+2009.07.18 with a MAWD as backup. The first dual-deploy flight with a TM
+board in control of ejection charges!
+
+## sn 2 ##
+
+Full load of v0.1 PCB, two cuts and jumps to rewire P1_2 to be SPI memory
+chip select, R14 and R15 loaded with 56k, 10k tacked from each to
+ground.
+
+Delivered to Keith Packard for firmware development and use. Flown twice
+on 10 May 2008 in Keith's Grappler to about 45m on Estes D12-3 motors.
+
+Flew in Keith's Little Dog Dual Deploy at Mile High Mayhem as a payload. The
+ascent was pretty but the rocket failed to deploy and lawn-darted. The battery
+and screw terminal block connectors got more or less torn off, but the rest
+of the board survived and good data was recovered from the flight.
+
+Repaired by Bdale, sent back to Keith on 7 July 2009. Keith reported the
+baro sensor as flakey, it was replaced in October 2009 prior to
+NCR Octoberfest.
+
+## sn 3 ##
+
+Full load of v0.1 PCB on 2009.04.22, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Installed in Bdale's Vertical Assault after sn 1 moved to Horizon, but never
+flown there.
+
+Pulled and given to Keith to take home from Mayhem.
+
+Lost in Keith's Nike which was lost for a while after an apparently nominal
+flight in June 2009 at Brothers, Oregon. Rocket was later found and this unit
+is reportedly still in good condition.
+
+## sn 4 ##
+
+Full load of v0.1 PCB on 2009.04.22, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Installed in Robert's Lil Nuke.
+
+Lost at Hudson Ranch 2009.07.18 when we forgot to tape the nose cone on and
+both it and the electronics sled came out at apogee and were not recovered.
+
+## sn 5 ##
+
+Partial "ground" load of v0.1 PCB on 2009.04.23 plus beeper and serial
+connector for use as TeleDongle or for TeleTerra prototype.
+
+Bdale's TeleDongle.
+
+Keith added acrylic LED light pipes and a LiPo for use in RDF after flight.
+
+## sn 6 ##
+
+Partial "ground" load of v0.1 PCB on 2009.04.23 for use as TeleDongle.
+
+Keith's TeleDongle.
+
+Keith added acrylic LED light pipes and a LiPo for use in RDF after flight.
+
+## sn 7 ##
+
+Full load of v0.1 PCB on 2009.08.08, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Pulled from Vertical Assault (never flew there) and taken to Keith in Japan
+in October 2009 as replacement.
+
+## sn 8 ##
+
+Full load of v0.1 PCB on 2009.08.08, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Delivered to Keith in early November 2009.
+
+## sn 9 ##
+
+Full load of v0.1 PCB on 2009.08.15, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Installed in Bdale's Trick-o-Treat 98mm airframe.
+
+## sn 10 ##
+
+Full load of v0.1 PCB on 2009.08.15, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Installed in Robert's Lil Nuke.
+
+## sn 11 ##
+
+Full load of v0.1 PCB on 2009.08.15, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground. Accelerometer loaded is MMA2204EG 100G unit!
+
+In G-Spot, this accelerometer recorded 52.8 gee acceleration on a
+Cesaroni pro29 H399 reload at NCR Oktoberfest 2009!
+
+Beeper failed after a hard landing, replaced 2010.02.06.
+
+## sn 12 ##
+
+Full load of v0.1 PCB on 2009.11.05, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground. Accelerometer loaded is MMA2204EG 100G unit!
+
+## sn 13 ##
+
+Full load of v0.1 PCB on 2009.11.05, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+Modified 2009.11.20 to:
+
+* use TC1055-3.3VCT713 100ma regulator proposed for v0.2
+* route 3.3V instead of v_lipo to the serial connector for SkyTraq GPS
+* use v_lipo for pyro voltage instead of 5V with 1000uF capacitor
+* added 100uF 1206 capacitor on 3.3V rail
+
+In this configuration, flew two textbook perfect flights on 2009.11.21 at
+Hudson Ranch in Trick-O-Treat on J motors.
+
+## sn 14 ##
+
+Full load of v0.1 PCB on 2009.11.05, two cuts and jumps to rewire P1_2
+to be SPI memory chip select, R14 and R15 loaded with 100k, 27k tacked
+from each to ground.
+
+## sn 15 ##
+
+Partial "ground" load of v0.1 PCB on 2009.11.18 for use as TeleDongle.
+
+## sn 16 ##
+
+Partial "ground" load of v0.1 PCB on 2009.11.18 for use as TeleDongle.
+
+## sn 51 ##
+
+Full load of v0.2 PCB on 2010.01.09, with 100g accel and screw terminals.
+
+Installed in G-Spot on 2010.02.06.
+
+## sn 52 ##
+
+Full load of v0.2 PCB on 2010.01.09, with 50g accel and Tyco header.
+
+Went home with Keith from LCA 2010 in Wellington.
+
+## sn 53 ##
+
+Full load of v0.2 PCB on 2010.01.09, with 40g accel and screw terminals.
+
+## sn 100-207 ##
+
+First production run of 108 pieces of TeleDongle v0.2 by
+[Advanced Circuits](http://4pcb.com), received 2010.02.25.
+