Add USB detection circuit

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/telegps.sch b/telegps.sch
index 7495e169469ad573d9fc410072aa1473e4bd0237..dd3ac6f030991ae7831cc716ee6090d82ef481d5 100644 (file)
--- a/telegps.sch
+++ b/telegps.sch
@@ -1429,10 +1429,36 @@ value=NoConnection
 T 43700 54900 5 10 0 0 0 0 1
 device=DRC_Directive
 }
-C 43700 54700 1 0 0 nc-left.sym
+C 41900 48600 1 90 0 resistor.sym
 {
-T 43700 55100 5 10 0 0 0 0 1
-value=NoConnection
-T 43700 55500 5 10 0 0 0 0 1
-device=DRC_Directive
+T 41500 48900 5 10 0 1 90 0 1
+device=RESISTOR
+T 41900 48600 5 10 0 1 0 0 1
+footprint=0402
+T 41300 49200 5 10 1 1 0 0 1
+refdes=R9
+T 41300 48800 5 10 1 1 0 0 1
+value=10k
+}
+C 41900 47700 1 90 0 resistor.sym
+{
+T 41500 48000 5 10 0 1 90 0 1
+device=RESISTOR
+T 41900 47700 5 10 0 1 0 0 1
+footprint=0402
+T 41300 48300 5 10 1 1 0 0 1
+refdes=R10
+T 41300 47900 5 10 1 1 0 0 1
+value=10k
+}
+C 41700 47400 1 0 0 gnd.sym
+N 41800 49500 40900 49500 4
+{
+T 40900 49600 5 10 1 1 0 0 1
+netname=v_usb
 }
+N 41800 48600 42800 48600 4
+N 42800 48600 42800 54800 4
+N 42800 54800 44200 54800 4
+T 40100 49900 9 10 1 0 0 0 1
+Detect USB connection