X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=Notebook;h=cfdc9ea9a6197ddf284d9d44537be5b0e0b0486a;hb=f17914e2b7b45ea3e69a58f4ba06c5dbe8427e04;hp=ef2464787ee61a668a0737d331be911366c45ed7;hpb=dcb376c9a68cb1e16a960426edb174a278a8a3f0;p=hw%2Fquantimotor

diff --git a/Notebook b/Notebook
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--- a/Notebook
+++ b/Notebook
@@ -61,3 +61,98 @@
   screw terminal strip, supports 14-26 AWG wire, 10A per pin continuous,
   DK 102-6165-ND, $1.01 q1
 
+2020.11.15
+- thinking about connectoring again.  for the base TeleStatic, we need to
+  have DC power in for battery charging, pyro output, pressure sensor, and 
+  load cell.
+
+  For battery charging, use the same powerpole and 3d-printed part we use on
+  TeleFireEight.
+
+  For pyro output, let's try a panel-mount single 3-wire AC socket:
+
+        Schurter 4300.0701, DK 486-1082-ND, $1.48 q1, needs a complex routed
+        opening, has lugs for soldering wires.  Sides squeeze to remove if
+        if needs to be replaced.  Should be easy enough to CNC mill opening.
+
+  For the pressure sensor, a 3-conductor 1/4" audio plug seems like a great
+  plan, use metal-shell Switchcraft parts.  Couple that with shielded twisted
+  pair cable.
+
+  For the load cell, we need 4 conductors plus ground, so a 5-pin XLR is an
+  economical possibility.  
+
+	male chassis IO-XLR5-M-BK-JL	DK 1937-1135-ND		4.65
+	female cable IO-XLR5-F-BK	DK 1937-1035-ND		5.25
+
+  Gary's load cells use Amphenol PC04E-10-6P, which is $64/ea from Newark!
+  Could offer to deliver him a cable with one of those on one end and what
+  we want on our end?
+
+  Cable that's 2 twisted pairs, shielded with drain wire, would suffice for
+  the load cell and could be used ignoring one pair for the pressure sensor
+  if desired.  Here's one with grey PVC jacket and foil shield:
+	Alpha M4473 SL005	DK M4473SL005-ND	51.79/100ft
+
+2021.02.09
+- Grainger carries Rust-Oleum "Industrial Choice Spray Paint in Gloss OSHA
+  Safety Purple for Masonry, Metal, Plastic, Wood", Item #6KP15, $6.60 per
+  12oz can.  The idea of test stand electronics being purple with orange
+  logo decals vs TeleFireEight being orange with purple decals might make
+  sense?
+
+2022.05.22
+- looking at firmware for v4 board.  
+
+	ads131		has driver for ADS131A0X, not quite working?
+	bdale-ui	work on teststand ui
+
+  - created new branch telestatic-v4 from master
+  - merged bdale-ui, resolving conflict in altoslib/AltosCSV.java
+  - merged ads131, resolving conflict in src/kernel/ao_data.h
+
+- improper gain setting or higher than expected mV/V on load cell can easily
+  drive INA125 output above the 5V allowed by ADC input.  adding a 5.1V, 500mW
+  zener between INA125 and ADC to clamp that and protect the ADC
+
+
+2022.09.17
+- and now, for something completely different...
+
+  What if I re-think TeleStatic to use an ESP32-S3 chip with integrated WiFi
+  radio?  Imagine a board in an ammo box with an SMA female and a cheap WiFi
+  whip on top of the box.  Looks over the air like an access point with web
+  server.  Take any client device (laptop, tablet, phone) with a web browser
+  and use it to talk to the box, check status, initiate a burn, etc.  If we
+  include an SD card, then data is stored on board and can be downloaded via
+  WiFi, or pulled out and parsed later.
+
+  One really big win with this approach is that ALL the software involved in
+  operation lives on the board.  Only post-processing tools might want to live
+  on a separate computer.  And, frankly, if we make "raw" data avaialble in 
+  CSV form and have on-board plotting with pdf output .. we'd be about done?
+
+  The onboard 12-bit ADC seems pretty lame, but I've been planning an off-SOC
+  SPI attache ADC anyway, so who cares?  The pyro circuit, LED outputs, 
+
+  The ESP32-S3 is under $3 each at Q1 in stock at DK, a 56 lead QFN'ish thing.
+
+2022.09.19
+- sadly, the ESP32 series requires a pile of binary firmware blobs to make
+  the wifi and BT stuff work, and because those execute on the same processor
+  and must be linked to the firmware, it just isn't legally possible to write
+  GPL'ed code for this processor series.  Sigh.
+
+  So, Keith suggests I use an available SAMD21 part with 256k flash and 32k RAM
+  and an external standalone wifi peripheral, like the uBlox NINA-W131-03B.
+  You talk to it with an AT command set, so we don't have to deal with a binary
+  firmware blob.  Amusingly, this seems to have an ESP32 inside!
+
+- bought a NINA eval board to play with .. should be able to hook it to one of
+  my existing proto boards?
+
+2022.11.10
+- looks like I have 25 pieces of STM32L151VCT6A, which might be well used for
+  an initial TeleStatic board run?  256k flash, 32k RAM
+
+