changes in schematic inspired by PSAS design review. pull-downs on firing

lines, connecting self-test pin on the accelerometer, tweaking voltage
dividers to make better use of ADC 3.3V input range, etc

diff --git a/beacon.sch b/beacon.sch
index 098b04e1bddd61f1a69c861d08c3e54d1164d060..873eb31322101dd6f41c46c7db04719579e5480a 100644 (file)
--- a/beacon.sch
+++ b/beacon.sch
@@ -698,14 +698,14 @@ N 47700 54900 46200 54900 4
 T 46200 55000 5 10 1 1 0 0 1
 netname=v_lipo
 }
-N 47200 52100 46200 52100 4
+N 47200 52100 45200 52100 4
 {
-T 46200 52200 5 10 1 1 0 0 1
+T 45200 52200 5 10 1 1 0 0 1
 netname=drogue
 }
-N 47200 50700 46200 50700 4
+N 47200 50700 45200 50700 4
 {
-T 46200 50800 5 10 1 1 0 0 1
+T 45200 50800 5 10 1 1 0 0 1
 netname=main
 }
 C 53100 54500 1 90 0 capacitor.sym
@@ -829,20 +829,18 @@ C 47800 57700 1 90 0 resistor-1.sym
 {
 T 47400 58000 5 10 0 0 90 0 1
 device=RESISTOR
-T 48100 58400 5 10 1 1 180 0 1
+T 48200 58400 5 10 1 1 180 0 1
 refdes=R12
 T 47900 57900 5 10 1 1 0 0 1
-value=10K
+value=5k
 T 47800 57700 5 10 0 0 0 0 1
 footprint=0402
-T 47800 57700 5 10 0 0 0 0 1
-digikey=RMCF1/16S10K1%RCT-ND
 }
 C 47800 56600 1 90 0 resistor-1.sym
 {
 T 47400 56900 5 10 0 0 90 0 1
 device=RESISTOR
-T 48100 57300 5 10 1 1 180 0 1
+T 48200 57300 5 10 1 1 180 0 1
 refdes=R13
 T 47900 56800 5 10 1 1 0 0 1
 value=10K
@@ -884,7 +882,7 @@ netname=accel_x
 N 62900 53200 61600 53200 4
 {
 T 61600 53300 5 10 1 1 0 0 1
-netname=unused
+netname=accel_st
 }
 N 62900 54000 61600 54000 4
 {
@@ -968,7 +966,7 @@ N 61600 57600 62900 57600 4
 T 61600 57700 5 10 1 1 0 0 1
 netname=sense_d
 }
-C 54900 44800 1 0 0 gnd-1.sym
+C 54700 44800 1 0 0 gnd-1.sym
 N 55000 45900 53900 45900 4
 {
 T 53900 46000 5 10 1 1 0 0 1
@@ -979,7 +977,7 @@ N 55000 45500 53900 45500 4
 T 53900 45600 5 10 1 1 0 0 1
 netname=rx1
 }
-T 55900 45200 9 10 1 0 0 0 2
+T 56000 45500 9 10 1 0 0 0 2
 Serial 1
 
 N 62900 59200 61600 59200 4
@@ -1005,8 +1003,7 @@ digikey=277-1721-ND
 }
 N 67400 65500 67300 65500 4
 N 67300 65500 67300 65900 4
-C 52500 48000 1 0 0 gnd-1.sym
-N 55000 48300 52600 48300 4
+C 54700 48000 1 0 0 gnd-1.sym
 T 55900 47200 9 10 1 0 0 0 5
    Debug
 
@@ -1164,51 +1161,37 @@ N 49400 48600 50600 48600 4
 N 50600 47500 50600 48600 4
 N 50600 45900 50600 45100 4
 N 50600 45100 49400 45100 4
-C 49500 64700 1 0 0 gnd-1.sym
-C 50600 66600 1 0 0 resistor.sym
+C 51000 64700 1 0 0 gnd-1.sym
+C 55500 64900 1 90 0 capacitor.sym
 {
-T 50900 67000 5 10 0 0 0 0 1
-device=RESISTOR
-T 50600 66800 5 10 1 1 0 0 1
-refdes=R301
-T 51300 66800 5 10 1 1 0 0 1
-value=1k
-T 50600 66600 5 10 0 1 0 0 1
-digikey=RMCF1/16S1K1%RCT-ND
-T 50600 66600 5 10 0 0 0 0 1
-footprint=0402
-}
-C 51900 65800 1 90 0 capacitor.sym
-{
-T 51200 66000 5 10 0 0 90 0 1
+T 54800 65100 5 10 0 0 90 0 1
 device=CAPACITOR
-T 52300 66500 5 10 1 1 180 0 1
+T 55900 65600 5 10 1 1 180 0 1
 refdes=C305
-T 51000 66000 5 10 0 0 90 0 1
+T 54600 65100 5 10 0 0 90 0 1
 symversion=0.1
-T 51800 66000 5 10 1 1 0 0 1
-value=0.01uF
-T 51900 65800 5 10 0 1 0 0 1
+T 55400 65100 5 10 1 1 0 0 1
+value=0.1uF
+T 55500 64900 5 10 0 1 0 0 1
 digikey=399-1249-1-ND
-T 51900 65800 5 10 0 0 0 0 1
+T 55500 64900 5 10 0 0 0 0 1
 footprint=0402
 }
-C 51600 65500 1 0 0 gnd-1.sym
-N 50600 66700 50400 66700 4
-N 51500 66700 52700 66700 4
+C 55200 64600 1 0 0 gnd-1.sym
+N 51900 66700 54200 66700 4
 T 13300 -8600 8 10 0 1 0 0 1
 digikey=MMA7260QT-ND
 T 13300 -8600 8 10 0 1 0 0 1
 digikey=MCP9700-E/TO-ND
-C 48100 65000 1 0 0 MMA2202D.sym
+C 49600 65000 1 0 0 MMA2202D.sym
 {
-T 48595 66995 5 10 1 1 0 0 1
+T 50095 66995 5 10 1 1 0 0 1
 device=MMA2202EG
-T 48395 67295 5 10 1 1 0 0 1
+T 49895 67295 5 10 1 1 0 0 1
 refdes=U9
-T 48095 64995 5 10 0 1 0 0 1
+T 49595 64995 5 10 0 1 0 0 1
 footprint=SOIC16
-T 48100 65000 5 10 0 0 0 0 1
+T 49600 65000 5 10 0 0 0 0 1
 digikey=MMA2202EG-ND
 }
 C 47700 65700 1 90 0 capacitor.sym
@@ -1229,38 +1212,36 @@ digikey=399-3027-1-ND
 N 47500 66700 47500 66600 4
 C 47400 65400 1 0 0 gnd-1.sym
 C 46500 66700 1 0 0 5V-plus-1.sym
-C 52800 65800 1 90 0 resistor.sym
+C 54300 65800 1 90 0 resistor.sym
 {
-T 52400 66100 5 10 0 0 90 0 1
+T 53900 66100 5 10 0 0 90 0 1
 device=RESISTOR
-T 53400 66500 5 10 1 1 180 0 1
+T 54900 66500 5 10 1 1 180 0 1
 refdes=R302
-T 52800 65795 5 10 0 1 90 0 1
+T 54300 65795 5 10 0 1 90 0 1
 footprint=0402
-T 52900 66000 5 10 1 1 0 0 1
-value=10K
-T 52800 65800 5 10 0 1 0 0 1
-digikey=RMCF1/16S10K1%RCT-ND
+T 54400 66000 5 10 1 1 0 0 1
+value=5k
 }
-C 52800 64900 1 90 0 resistor.sym
+C 54300 64900 1 90 0 resistor.sym
 {
-T 52400 65200 5 10 0 0 90 0 1
+T 53900 65200 5 10 0 0 90 0 1
 device=RESISTOR
-T 53400 65600 5 10 1 1 180 0 1
+T 54900 65600 5 10 1 1 180 0 1
 refdes=R303
-T 52800 64895 5 10 0 1 90 0 1
+T 54300 64895 5 10 0 1 90 0 1
 footprint=0402
-T 52900 65100 5 10 1 1 0 0 1
+T 54400 65100 5 10 1 1 0 0 1
 value=10K
-T 52800 64900 5 10 0 1 0 0 1
+T 54300 64900 5 10 0 1 0 0 1
 digikey=RMCF1/16S10K1%RCT-ND
 }
-N 52700 65800 54900 65800 4
+N 54200 65800 56400 65800 4
 {
-T 54200 65900 5 10 1 1 0 0 1
+T 55700 65900 5 10 1 1 0 0 1
 netname=accel_x
 }
-C 52600 64600 1 0 0 gnd-1.sym
+C 54100 64600 1 0 0 gnd-1.sym
 C 42400 65000 1 0 0 MAX1686H.sym
 {
 T 42795 67395 5 10 1 1 0 0 1
@@ -1315,7 +1296,7 @@ value=0.1uF
 T 42000 65700 5 10 0 1 0 0 1
 digikey=399-3027-1-ND
 }
-N 45400 66700 48100 66700 4
+N 45400 66700 49600 66700 4
 N 43500 67600 43500 68000 4
 N 44400 68000 44400 67800 4
 N 44400 67800 44300 67800 4
@@ -1335,10 +1316,10 @@ N 42400 65500 42200 65500 4
 N 42200 65500 42200 64900 4
 N 42200 64900 44300 64900 4
 N 45800 66700 45800 66600 4
-T 52100 67100 9 10 1 0 0 0 2
+T 53100 67300 9 10 1 0 0 0 2
 Accelerometer runs on 5V,
 divider to match ADC range.
-T 48400 67700 9 10 1 0 0 0 4
+T 49900 67700 9 10 1 0 0 0 4
 MMA2201  is 40G
 MMA2202 is 50G
 MMA2204 is 100G
@@ -1355,3 +1336,38 @@ N 55000 44700 53900 44700 4
 T 53900 44800 5 10 1 1 0 0 1
 netname=v_lipo
 }
+C 46300 51200 1 90 0 resistor.sym
+{
+T 45900 51500 5 10 0 0 90 0 1
+device=RESISTOR
+T 46000 51900 5 10 1 1 180 0 1
+refdes=R6
+T 46300 51195 5 10 0 1 90 0 1
+footprint=1206
+T 45700 51400 5 10 1 1 0 0 1
+value=10k
+}
+C 46300 49800 1 90 0 resistor.sym
+{
+T 45900 50100 5 10 0 0 90 0 1
+device=RESISTOR
+T 46000 50500 5 10 1 1 180 0 1
+refdes=R7
+T 46300 49795 5 10 0 1 90 0 1
+footprint=1206
+T 45700 50000 5 10 1 1 0 0 1
+value=10k
+}
+C 46100 50900 1 0 0 gnd-1.sym
+C 46100 49500 1 0 0 gnd-1.sym
+N 49600 65900 48600 65900 4
+{
+T 48600 66000 5 10 1 1 0 0 1
+netname=accel_st
+}
+N 55000 48300 54800 48300 4
+N 54800 45100 55000 45100 4
+T 56000 44800 9 10 1 0 0 0 3
+v_lipo provided for optional remote
+attachment of SparkFun GPS-08936
+based on MN5010HS GPS module