added udis brake, think thats the latest design 19.03.15

shields/diyStepperDriver/LM339.asy

@@ -0,0 +1,35 @@
+Version 4
+SymbolType CELL
+LINE Normal -32 32 32 64
+LINE Normal -32 96 32 64
+LINE Normal -32 32 -32 96
+LINE Normal -28 48 -20 48
+LINE Normal -28 80 -20 80
+LINE Normal -24 84 -24 76
+LINE Normal 0 32 0 48
+LINE Normal 0 96 0 80
+LINE Normal 4 44 12 44
+LINE Normal 8 40 8 48
+LINE Normal 4 84 12 84
+WINDOW 0 16 32 Left 0
+WINDOW 3 16 96 Left 0
+SYMATTR Value LM339
+SYMATTR Prefix X
+SYMATTR SpiceModel LM339.sub
+SYMATTR Value2 LM339
+SYMATTR Description Quad  Single Supply 3V/5V Comparator LM339
+PIN -32 80 NONE 0
+PINATTR PinName In+
+PINATTR SpiceOrder 1
+PIN -32 48 NONE 0
+PINATTR PinName In-
+PINATTR SpiceOrder 2
+PIN 0 32 NONE 0
+PINATTR PinName V+
+PINATTR SpiceOrder 3
+PIN 0 96 NONE 0
+PINATTR PinName V-
+PINATTR SpiceOrder 4
+PIN 32 64 NONE 0
+PINATTR PinName OUT
+PINATTR SpiceOrder 5

shields/diyStepperDriver/LM339.sub

@@ -0,0 +1,55 @@
+* LM339 VOLTAGE COMPARATOR "MACROMODEL" SUBCIRCUIT
+* CREATED USING PARTS VERSION 4.03 ON 03/07/90 AT 14:17
+* REV (N/A)
+* CONNECTIONS:   NON-INVERTING INPUT
+*                | INVERTING INPUT
+*                | | POSITIVE POWER SUPPLY
+*                | | | NEGATIVE POWER SUPPLY
+*                | | | | OPEN COLLECTOR OUTPUT
+*                | | | | |
+.SUBCKT LM339    1 2 3 4 5
+*
+  F1    9  3 V1 1
+  IEE   3  7 DC 100.0E-6
+  VI1  21  1 DC .75
+  VI2  22  2 DC .75
+  Q1    9 21  7 QIN
+  Q2    8 22  7 QIN
+  Q3    9  8  4 QMO
+  Q4    8  8  4 QMI
+.MODEL QIN PNP(IS=800.0E-18 BF=2.000E3)
+.MODEL QMI NPN(IS=800.0E-18 BF=1002)
+.MODEL QMO NPN(IS=800.0E-18 BF=1000 CJC=1E-15 TR=807.4E-9)
+  E1   10  4  9  4  1
+  V1   10 11 DC 0
+  Q5    5 11  4 QOC
+.MODEL QOC NPN(IS=800.0E-18 BF=20.29E3 CJC=1E-15 TF=942.6E-12 TR=543.8E-9)
+  DP    4  3 DX
+  RP 3  4 46.3E3
+.MODEL DX  D(IS=800.0E-18)
+*
+.ENDS
+
+* Model for packaged LM339 devices
+* 14-pin DIP, 4 comparators per package
+* CONNECTIONS:      Output 2
+*                   | Output 1
+*                   | | Positive Power Supply 
+*                   | | | Input 1 Inverting
+*                   | | | | Input 1 Non-Inverting
+*                   | | | | | Input 2 Inverting
+*                   | | | | | | Input 2 Non-Inverting
+*                   | | | | | | | Input 3 Inverting
+*                   | | | | | | | | Input 3 Non-inverting
+*                   | | | | | | | | | Input 4 Inverting
+*                   | | | | | | | | | |  Input 4 Non-inverting
+*                   | | | | | | | | | |  |  Negative Power Supply (or Gnd)
+*                   | | | | | | | | | |  |  |  Output 4
+*                   | | | | | | | | | |  |  |  |  Output 3
+*                   | | | | | | | | | |  |  |  |  |
+.SUBCKT LM339_DIP14 1 2 3 4 5 6 7 8 9 10 11 12 13 14
+X1 5  4  3 12 2  LM339
+X2 7  6  3 12 1  LM339
+X3 9  8  3 12 14 LM339
+X4 11 10 3 12 13 LM339
+.ENDS