For the latest TeleMetrum firmware and related ground station software, please
visit the [AltOS](../AltOS) page on this site.
-These are photos of our current production version:
+These are photos of the previous production version (we haven't taken good
+pictures of v1.2 yet):
<a href="v1.1/telemetrum-v1.1-thside.jpg"> <img src="v1.1/telemetrum-v1.1-thside-thumb.jpg"></a>
<a href="v1.1/telemetrum-v1.1-smtside.jpg"> <img src="v1.1/telemetrum-v1.1-smtside-thumb.jpg"></a>
* Supports dual deployment (can fire 2 ejection charges)
* 70cm ham-band transceiver for telemetry downlink
* Barometric pressure sensor good to 45k feet MSL
-* 1-axis high-g accelerometer for motor characterization
+* 1-axis 70-g accelerometer for motor characterization
* On-board, integrated GPS receiver
* On-board non-volatile memory for flight data storage
* USB for power, configuration, and data recovery
* U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
* async serial interface
* [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
- * [Freescale MMA2202EG](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MMA2202EG) 50g accelerometer. Can use 40-200g variants!
+ * [Analog Devices ADXL78](http://www.analog.com/en/mems-sensors/inertial-sensors/adxl78/products/product.html) 70g accelerometer.
* Software Features
* Written mostly in C with some 8051 assembler
* Runs from on-chip flash, uses on-chip RAM, stores flight data to
newer versions have their own PCB design.
For those who don't have ready access to the gEDA suite, here are pdf snapshots
-of the files for Production PCB version 1.1 in more easily readable form.
+of the files for Production PCB version 1.2 in more easily readable form.
-* [schematic](v1.1/telemetrum.pdf)
-* [pcb artwork](v1.1/telemetrum.pcb.pdf)
-* [bill of materials](v1.1/partslist.csv)
+* [schematic](v1.2/telemetrum.pdf)
+* [pcb artwork](v1.2/telemetrum.pcb.pdf)
+* [bill of materials](v1.2/partslist.csv)
Rockets we know of flying with TeleMetrum boards have exceeded 50g acceleration,
been well above Mach 1, and reached altitudes
## Future Plans ##
-TeleMetrum v1.2 is back from our assembler and the first batch are being
-prepared for sale, hopefully by Christmas day. The significant user-visible
-change is that we've moved to a 70g accelerometer by default, due to poor
-availability of the part we previously used due to damage to the Freescale
-facility in Sendai caused by the Japan earthquake / tsunami. Full details
-will be posted here when they're available to order.
-
-## Problems ##
-
-* The CC1111F32 is a 36-pin QFN package, which necessitates reflow
- soldering. Since we needed to reflow solder anyway, and because TI used
- them in their reference design, we went a little crazy and used 0402
- passive parts everywhere. That means working under a microscope to
- place parts! Without an inspection microscope, loading and testing these
- boards might be impossible.
-
-* The addition of on-board GPS in v0.2 and later boards means that the total
- power consumption
- can exceed the rate at which we draw power from the USB interface,
- particularly when the GPS is in cold start mode. This means a battery must
- be attached during operation, and also that the battery will only charge
- effectively from USB when the board is turned off.
+TeleMetrum v1.2 is now available for sale. Eventually we'll run out of v1.2
+boards, and by then no dobut we'll have found more things to tweak...
## [History of TeleMetrum](history) ##
--- /dev/null
+"device","value","footprint","loadstatus","vendor","vendor_part_number","quantity","refdes"
+"CONNECTOR","LiPo","B2B-PH","throughhole","digikey","A100034-ND","1","B1"
+"CAPACITOR","0.1uF","0402","smt","digikey","399-3027-1-ND","8","C10 C12 C13 C20 C28 C36 C6 C9"
+"CAPACITOR","47pF","0402","smt","digikey","399-1019-1-ND","3","C11 C2 C3"
+"CAPACITOR","4.7uF","0402","smt","digikey","490-5408-1-ND","3","C14 C16 C7"
+"CAPACITOR","0.22uF","0402","smt","digikey","587-1228-1-ND","1","C15"
+"CAPACITOR","1uF","0402","smt","digikey","490-1320-1-ND","5","C19 C37 C39 C4 C5"
+"CAPACITOR","220pF","0402","smt","digikey","587-1215-1-ND","4","C21 C26 C27 C29"
+"CAPACITOR","3.9pF","0402","smt","digikey","490-1272-1-ND","2","C22 C25"
+"CAPACITOR","8.2pF","0402","smt","digikey","587-1946-1-ND","1","C23"
+"CAPACITOR","5.6pF","0402","smt","digikey","490-1275-1-ND","1","C24"
+"CAPACITOR","22pF","0402","smt","digikey","490-1283-1-ND","3","C30 C31 C35"
+"CAPACITOR","100uF","1206","smt","digikey","490-4512-1-ND","1","C32"
+"CAPACITOR","0.001uF","0402","smt","digikey","445-2651-1-ND","2","C34 C8"
+"CAPACITOR","0.01uF","0402","noload","digikey","709-1132-1-ND","1","C38"
+"LED","yellow","0603diode","smt","digikey","160-1437-1-ND","1","D1"
+"LED","red","0603diode","smt","digikey","160-1433-1-ND","1","D2"
+"CONNECTOR","U.FL","ufl","smt","digikey","WM5587CT-ND","1","J10"
+"CONNECTOR","Pyro","282834-6","throughhole","digikey","A98337-ND","1","J4"
+"CONNECTOR","miniUSB","548190572","smt","digikey","WM17116CT-ND","1","J5"
+"CONNECTOR","Debug","0-215079-4","throughhole","digikey","A99472CT-ND","1","J6"
+"CONNECTOR","SMA","sma-edge","noload","digikey","CONSMA003.062-ND","1","J8"
+"CONNECTOR","CompanionInterface","0-338068-8","throughhole","digikey","A99436CT-ND","1","J9"
+"INDUCTOR","27nH","0402","smt","digikey","490-2628-1-ND","4","L1 L3 L4 L5"
+"INDUCTOR","22nH","0402","smt","digikey","490-2627-1-ND","1","L2"
+"MOSFET","FDS9926A","SO8","smt","digikey","FDS9926ACT-ND","1","Q1"
+"RESISTOR","5k","0402","smt","digikey","311-5.10KLRCT-ND","2","R10 R5"
+"RESISTOR","10k","0402","smt","digikey","RMCF1/16S10K1%RCT-ND","4","R11 R24 R26 R4"
+"RESISTOR","270","0402","smt","digikey","541-270LCT-ND","2","R13 R9"
+"RESISTOR","100k","0402","smt","digikey","RMCF1/16S100KFRCT-ND","2","R14 R15"
+"RESISTOR","56k","0402","smt","digikey","RHM56.0KLCT-ND","1","R16"
+"RESISTOR","100","0402","smt","digikey","P100JCT-ND","2","R19 R20"
+"RESISTOR","27k","0402","smt","digikey","311-27KJRCT-ND","2","R21 R22"
+"RESISTOR","5.6k","0402","smt","digikey","P5.60KLCT-ND","1","R25"
+"RESISTOR","3.3k","0402","smt","digikey","311-3.30KLRCT-ND","2","R2 R3"
+"RESISTOR","1.5k","0402","smt","digikey","RMCF1/16S1.5K1%RCT-ND","1","R6"
+"RESISTOR","33","0402","smt","digikey","RHM33.0LCT-ND","2","R7 R8"
+"IC","TC2185-3.3","SOT23-5","smt","digikey","TC2185-3.3VCCT-ND","1","U1"
+"IC","Venus638FLPx","Venus634FLPx","smt","skytraq","Venus638FLPx","1","U10"
+"IC","MCP130T-300","SOT23","smt","digikey","MCP130T-300I/TTCT-ND","1","U11"
+"IC","MAX1555","SOT23-5","smt","maxim","MAX1555EZK+","1","U2"
+"IC","ADXL78","ADXL78","smt","digikey","AD22281-R2CT-ND","1","U3"
+"IC","LTC1682-5","SO8","smt","digikey","LTC1682CS8-5#PBF-ND","1","U4"
+"IC","W25Q16","SOIJ8","smt","digikey","W25Q16BVSSIG-ND","1","U5"
+"IC","MP3H6115A","MOT1317","smt","digikey","MP3H6115A6U-ND","1","U6"
+"BEEPER","TDK_PS12","TDK_PS12","throughhole","digikey","445-2525-1-ND","1","U8"
+"IC","CC1111","TI-QFN36","smt","digikey","296-22684-1-ND","1","U9"
+"CRYSTAL","48mhz","ABM8","smt","digikey","887-1335-1-ND","1","X1"