From 2bcf81e22fba1a318d120077ad4f64b20d383ce6 Mon Sep 17 00:00:00 2001
From: Bdale Garbee <bdale@gag.com>
Date: Sun, 23 Feb 2014 18:10:36 -0700
Subject: [PATCH] select resistor values, update attributes

---
 usbtrng.pcb |  6 +++---
 usbtrng.sch | 32 ++++++++++++++++++++++++++++----
 2 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/usbtrng.pcb b/usbtrng.pcb
index a5a5d78..556cae9 100644
--- a/usbtrng.pcb
+++ b/usbtrng.pcb
@@ -3,7 +3,7 @@
 # To read pcb files, the pcb version (or the git source date) must be >= the file version
 FileVersion[20091103]
 
-PCB["USBrelay" 800.00mil 600.00mil]
+PCB["USBTRNG" 800.00mil 600.00mil]
 
 Grid[100.000000 0.0000 0.0000 0]
 PolyArea[200000000.000000]
@@ -1010,7 +1010,7 @@ Element["" "0402" "R73" "1M" 469.00mil 472.26mil 31.50mil -31.50mil 3 100 ""]
 
 	)
 
-Element["" "0402" "R71" "100K" 679.26mil 275.00mil 31.50mil 31.50mil 2 100 ""]
+Element["" "0402" "R71" "150k" 679.26mil 275.00mil 31.50mil 31.50mil 2 100 ""]
 (
 	Pad[15.74mil -3.93mil 15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
 	Pad[-15.74mil -3.93mil -15.74mil 3.93mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
@@ -1031,7 +1031,7 @@ Element["" "0402" "R74" "10k" 429.00mil 488.00mil -31.50mil 31.50mil 1 100 ""]
 
 	)
 
-Element["" "0402" "R72" "470" 626.00mil 48.00mil -31.50mil 31.50mil 1 100 ""]
+Element["" "0402" "R72" "1k" 626.00mil 48.00mil -31.50mil 31.50mil 1 100 ""]
 (
 	Pad[-3.93mil 15.74mil 3.93mil 15.74mil 19.68mil 20.00mil 25.68mil "1" "1" "square"]
 	Pad[-3.93mil -15.74mil 3.93mil -15.74mil 19.68mil 20.00mil 25.68mil "2" "2" "square"]
diff --git a/usbtrng.sch b/usbtrng.sch
index 3ee42cb..129335a 100644
--- a/usbtrng.sch
+++ b/usbtrng.sch
@@ -559,11 +559,11 @@ loadstatus=smt
 T 63200 54000 5 10 0 1 90 0 1
 vendor=digikey
 T 63200 54000 5 10 0 1 90 0 1
-vendor_part_number=P100KLCT-ND
+vendor_part_number=P150KLCT-ND
 T 62900 54700 5 10 1 1 180 0 1
 refdes=R71
 T 62900 54400 5 10 1 1 180 0 1
-value=100K
+value=150k
 }
 C 63600 52600 1 0 0 npn.sym
 {
@@ -597,11 +597,15 @@ refdes=J5
 T 58745 60495 5 10 0 1 0 6 1
 footprint=usbAmale
 T 59100 60100 5 10 0 1 0 0 1
-vendor_part_number=534-931
+vendor_part_number=931K-ND
 T 59100 60100 5 10 0 1 0 0 1
 footprint=usbAmale
 T 59100 60100 5 10 0 1 0 0 1
 device=CONNECT?OR
+T 59100 60100 5 10 0 1 0 0 1
+loadstatus=handload
+T 59100 60100 5 10 0 1 0 0 1
+vendor=digikey
 }
 C 72200 65400 1 180 0 resistor.sym
 {
@@ -682,6 +686,8 @@ T 63300 53100 5 10 0 0 0 0 1
 vendor_part_number=ZXRE1004FFCT-ND
 T 63300 53100 5 10 0 0 0 0 1
 vendor=digikey
+T 63300 53100 5 10 0 1 0 0 1
+loadstatus=smt
 }
 N 63600 53100 63100 53100 4
 C 62900 54900 1 0 0 3.3V-plus.sym
@@ -698,7 +704,9 @@ vendor=digikey
 T 63900 54700 5 10 1 1 180 0 1
 refdes=R72
 T 63900 54400 5 10 1 1 180 0 1
-value=470
+value=1k
+T 64200 54000 5 10 0 0 0 0 1
+vendor_part_number=P1.00KLCT-ND
 }
 C 63900 54900 1 0 0 3.3V-plus.sym
 N 64100 53600 64100 54000 4
@@ -738,6 +746,8 @@ T 65700 53600 5 10 0 0 0 0 1
 vendor=digikey
 T 65700 53600 5 10 0 0 0 0 1
 footprint=MSOP8
+T 65700 53600 5 10 0 1 0 0 1
+loadstatus=smt
 }
 C 67200 53800 1 0 0 opamp-dual.sym
 {
@@ -755,6 +765,8 @@ T 67200 53800 5 10 0 0 0 0 1
 vendor=digikey
 T 67200 53800 5 10 0 0 0 0 1
 footprint=MSOP8
+T 67200 53800 5 10 0 1 0 0 1
+loadstatus=smt
 }
 N 65700 53800 65300 53800 4
 N 67200 54000 66700 54000 4
@@ -777,6 +789,8 @@ T 65900 52600 5 10 1 1 0 0 1
 refdes=R73
 T 66400 52600 5 10 1 1 0 0 1
 value=1M
+T 66800 53000 5 10 0 1 0 0 1
+vendor_part_number=P1.00MLCT-ND
 }
 N 65900 52900 65500 52900 4
 N 65500 52900 65500 53800 4
@@ -798,6 +812,8 @@ T 65400 55200 5 10 1 1 0 0 1
 refdes=R74
 T 65900 55200 5 10 1 1 0 0 1
 value=10k
+T 66300 55600 5 10 0 0 0 0 1
+vendor_part_number=P10.0KLCT-ND
 }
 C 67400 55600 1 180 0 resistor.sym
 {
@@ -813,6 +829,8 @@ T 66500 55200 5 10 1 1 0 0 1
 refdes=R75
 T 67000 55200 5 10 1 1 0 0 1
 value=10k
+T 67400 55600 5 10 0 1 0 0 1
+vendor_part_number=P10.0KLCT-ND
 }
 N 66300 55500 66500 55500 4
 N 66400 55000 66400 55500 4
@@ -853,3 +871,9 @@ value=NoConnection
 T 68800 64300 5 10 0 0 0 0 1
 device=DRC_Directive
 }
+T 61100 51800 9 10 1 0 0 0 5
+select R71 for at least 8uA,
+less current -> more noise
+
+select R72 for Q1 collector
+voltage near 1.65V (VCC/2)
-- 
2.30.2