document example load cell amplifier gain resistor values in schematic

diff --git a/telefiretwo.sch b/telefiretwo.sch
index bcf0aed30078bf37dd4390b5e97bd9485941fc28..ebbdebc8f9e23f385ceba29bd7cb538a59b4e815 100644 (file)
--- a/telefiretwo.sch
+++ b/telefiretwo.sch
@@ -1932,9 +1932,12 @@ N 71900 66500 71800 66500 4
 L 72800 69300 72500 69300 3 0 0 0 -1 -1
 L 72500 69300 72500 68900 3 0 0 0 -1 -1
 L 72500 68900 72800 68900 3 0 0 0 -1 -1
-T 73800 64700 9 10 1 0 0 0 2
+T 71800 64500 9 10 1 0 0 0 5
 R106 sets gain, see INA125
-data sheet to pick value
+data sheet to pick value.
+
+2mV/V load cell needs gain of 500, or 121 ohms
+3mV/V load cell needs gain of 333 or 182 ohms
 T 80900 68400 9 10 1 0 0 0 2
 adjust output to
 3.3V ADC input