more connector notes

diff --git a/Notebook b/Notebook
index 3a55902df6f430f4544bbb4298a878685a2f5242..34e5ebf67e4261a408240da28b344412e94c284b 100644 (file)
--- a/Notebook
+++ b/Notebook
@@ -400,3 +400,44 @@
   two boards apart and use a ribbon cable with connectors to hook them
   together, *or* you leave off those two connectors to mount it as a
   single circuit board?  
+
+- How about 3 pin Neutrik for pressure sensor, 4 pin for load cell, 5
+  pin for strand burner?  Design a board that has 3/3/4/5 connectors,
+  only use the middle two with one ribbon cable to the main board for
+  stock QM, populate all 4 and an additional ribbon cable to daughter
+  card for QM with strand burner daughter card?  
+
+  For the main board, the signals needed are 
+       excite +
+       excite -
+       load +
+       load -
+       5V
+       pressure
+       gnd
+
+  For the daughter card, the signals needed are
+       5V
+       pressure
+       gnd
+       pyro +
+       burn wire 1
+       burn wire 2
+       burn wire 3
+
+- if we want to do something smaller than an SLA, there are 3S LiPo
+  charger/BMS boards for cheap via Amazon and Aliexpress that have
+  USB C power input that you hook 3 batteries to.  They do balanced
+  charging of the 3 cells.  I can imagine making a footprint to 
+  solder one with some through-hole jumpers to a board that also
+  has 3 of our LiPo connectors on it.  Just plug in 3 900mAh cells,
+  or even 3 of the 2Ah cells?  
+
+2025.05.02
+- shopping for PCB mount XLR connectors
+       3 pin   Neutrik  NC3MAAH-1      Mouser $1.07 q1
+               Neutrik  NC3MAAH        Mouser $1.09 q1
+               Amphenol AC3MAH-AU-PRE  Mouser $1.08 q10
+       4 pin   Neutrik  NC4MAH         Mouser $4.10 q10
+       5 pin   Amphenol AC5MAH-AU-B    Mouser $3.51 q10 (I have some of these)
+