5
4
3
2
1
D1
J1
VM 08 A B C D E F H J K L M N P R S T U V W X Y Z
D
C
-
+
1
VIN
VOUT
2
U3
R5 2.7k
12V U1B LM339
LM7812/TO C1 100uF
5 +
Q1 MJE2955T
U1A LM339
R8 910
R2 330
C2 2200uF
1
6 -
R9 4.7k
C
Q2 MJE2955T
R13 10k U1C
~2.3V
R7 910
LS1 LM339 14
9 +
6 4
U2D 12
8 -
8 11
11 13
13
CD4011B
9 16 1
R3 2.7k
SWITCH THROWING 7 +
R12 10k
C3 2200uF
2
R11 680
22/44 Edge Plug
R4 330
4 -
R10 680
D
Q3 MJE3055T
22/44 EDGE CONNECTOR U2C
B
RELAY DPDT
A
U1D
E-BLACK SWITCH COMMON F-RED SWITCH TURNOUT H-GREEN SWITCH STRAIGHT L-YELLOW CNT TRACK POWER M-GREEN CNT TRACK POWER N-GREEN HORNBY POWER P-YELLOW HORNBY POWER R-OPB 742 #1 CATHODE S-OPB 742 #2 CATHODE T-OPB 742 #1 COLLECTOR U-OPB 742 #2 COLLECTOR V-OPB 742 #1 ANODE W-OPB 742 #2 ANODE X-OPB 742 #1 EMITTER Y-OPB 742 #2 EMITTER
11 +
LM339 13
10 9
FLIP-FLOP FOR TRACK POLARITY
R1 150
CD4011B
A
Title CENTER TRACK CIRCUIT
Date: 4
B
8
10 -
Size A 5
R6 910
3
Document Number PRINCETON UNIVERSITY-MAE 412 (der) Thursday, January 06, 2005 2
Sheet
Rev A 1
of 1
1
