diff --git a/hardware/KiCAD/MBus_USB.pro b/hardware/KiCAD/MBus_USB.pro
new file mode 100755
index 0000000..9fd49a1
--- /dev/null
+++ b/hardware/KiCAD/MBus_USB.pro
@@ -0,0 +1,144 @@
+update=19/07/2012 21:21:54
+version=1
+last_client=eeschema
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+[pcbnew/libraries]
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+LibName2=connect
+LibName3=discret
+LibName4=pin_array
+LibName5=divers
+LibName6=libcms
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+LibName8=valves
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+LibName10=dip_sockets
+[general]
+version=1
+[eeschema]
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+[eeschema/libraries]
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+LibName6=linear
+LibName7=regul
+LibName8=74xx
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+LibName25=display
+LibName26=cypress
+LibName27=siliconi
+LibName28=opto
+LibName29=atmel
+LibName30=contrib
+LibName31=valves
diff --git a/hardware/KiCAD/MBus_USB.sch b/hardware/KiCAD/MBus_USB.sch
new file mode 100755
index 0000000..b2ba01e
--- /dev/null
+++ b/hardware/KiCAD/MBus_USB.sch
@@ -0,0 +1,1234 @@
+EESchema Schematic File Version 2  date 19/07/2012 21:21:28
+LIBS:prolific
+LIBS:power
+LIBS:device
+LIBS:transistors
+LIBS:conn
+LIBS:linear
+LIBS:regul
+LIBS:74xx
+LIBS:cmos4000
+LIBS:adc-dac
+LIBS:memory
+LIBS:xilinx
+LIBS:special
+LIBS:microcontrollers
+LIBS:dsp
+LIBS:microchip
+LIBS:analog_switches
+LIBS:motorola
+LIBS:texas
+LIBS:intel
+LIBS:audio
+LIBS:interface
+LIBS:digital-audio
+LIBS:philips
+LIBS:display
+LIBS:cypress
+LIBS:siliconi
+LIBS:opto
+LIBS:atmel
+LIBS:contrib
+LIBS:valves
+EELAYER 25  0
+EELAYER END
+$Descr A4 11700 8267
+encoding utf-8
+Sheet 1 1
+Title "MBus USB"
+Date "19 jul 2012"
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
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+$Comp
+L GND #PWR11
+U 1 1 500835A4
+P 4100 5750
+F 0 "#PWR11" H 4100 5750 30  0001 C CNN
+F 1 "GND" H 4100 5680 30  0001 C CNN
+	1    4100 5750
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR21
+U 1 1 50083582
+P 4850 5700
+F 0 "#PWR21" H 4850 5700 30  0001 C CNN
+F 1 "GND" H 4850 5630 30  0001 C CNN
+	1    4850 5700
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR20
+U 1 1 50083581
+P 4850 5700
+F 0 "#PWR20" H 4850 5700 30  0001 C CNN
+F 1 "GND" H 4850 5630 30  0001 C CNN
+	1    4850 5700
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR19
+U 1 1 50083547
+P 4850 5100
+F 0 "#PWR19" H 4850 5100 30  0001 C CNN
+F 1 "GND" H 4850 5030 30  0001 C CNN
+	1    4850 5100
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR18
+U 1 1 50083546
+P 4850 5100
+F 0 "#PWR18" H 4850 5100 30  0001 C CNN
+F 1 "GND" H 4850 5030 30  0001 C CNN
+	1    4850 5100
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR26
+U 1 1 50083532
+P 5950 3450
+F 0 "#PWR26" H 5950 3450 30  0001 C CNN
+F 1 "GND" H 5950 3380 30  0001 C CNN
+	1    5950 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L C C7
+U 1 1 500834BC
+P 4600 5000
+F 0 "C7" H 4650 5100 50  0000 L CNN
+F 1 "C" H 4650 4900 50  0000 L CNN
+	1    4600 5000
+	0    -1   -1   0   
+$EndComp
+$Comp
+L C C8
+U 1 1 500834AE
+P 4600 5600
+F 0 "C8" H 4650 5700 50  0000 L CNN
+F 1 "C" H 4650 5500 50  0000 L CNN
+	1    4600 5600
+	0    -1   -1   0   
+$EndComp
+$Comp
+L QUARTZCMS4 X1
+U 1 1 5008348A
+P 4150 5300
+F 0 "X1" H 4150 5450 60  0000 C CNN
+F 1 "12.000 MHz" H 4150 5150 60  0000 C CNN
+	1    4150 5300
+	0    -1   -1   0   
+$EndComp
+$Comp
+L USB_2 J1
+U 1 1 5007AB1E
+P 1150 7050
+F 0 "J1" H 1075 7300 60  0000 C CNN
+F 1 "USB_2" H 1200 6750 60  0001 C CNN
+F 4 "VCC" H 1475 7200 50  0001 C CNN "VCC"
+F 5 "D+" H 1450 7100 50  0001 C CNN "Data+"
+F 6 "D-" H 1450 7000 50  0001 C CNN "Data-"
+F 7 "GND" H 1475 6900 50  0001 C CNN "Ground"
+	1    1150 7050
+	1    0    0    -1  
+$EndComp
+Text Notes 6750 1850 0    60   ~ 0
+approx 34V
+Text Notes 2100 850  0    60   ~ 0
+Optional external\npower supply
+Text Notes 10900 2100 0    60   ~ 0
+MBus
+Text Label 10100 2200 0    60   ~ 0
+MBus-
+Text Label 10100 2000 0    60   ~ 0
+MBus+
+Text Label 4750 4100 0    60   ~ 0
+RxD (receive from MBus)
+Text Label 4750 4000 0    60   ~ 0
+TxD (send to MBus)
+Text Label 4750 4200 0    60   ~ 0
+USB GND
+Text Label 4750 3900 0    60   ~ 0
+USB +5V
+Text Notes 4350 4400 0    60   ~ 0
+To USB serial adapter\n(e.g. PL2303,\nwith 3.3V/5V levels)
+$Comp
+L CONN_2 P1
+U 1 1 4EAA8D88
+P 3000 850
+F 0 "P1" V 2950 850 40  0000 C CNN
+F 1 "CONN_2" V 3050 850 40  0000 C CNN
+	1    3000 850 
+	-1   0    0    -1  
+$EndComp
+$Comp
+L CONN_2 P3
+U 1 1 4EAA8D6F
+P 10750 2100
+F 0 "P3" V 10700 2100 40  0000 C CNN
+F 1 "CONN_2" V 10800 2100 40  0000 C CNN
+	1    10750 2100
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR5
+U 1 1 4EAA8D62
+P 3400 1000
+F 0 "#PWR5" H 3400 1000 30  0001 C CNN
+F 1 "GND" H 3400 930 30  0001 C CNN
+	1    3400 1000
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR14
+U 1 1 4EAA8D58
+P 4750 4250
+F 0 "#PWR14" H 4750 4250 30  0001 C CNN
+F 1 "GND" H 4750 4180 30  0001 C CNN
+	1    4750 4250
+	1    0    0    -1  
+$EndComp
+$Comp
+L INDUCTOR L1
+U 1 1 4EAA8D47
+P 4400 3700
+F 0 "L1" V 4350 3700 40  0000 C CNN
+F 1 "INDUCTOR" V 4500 3700 40  0000 C CNN
+	1    4400 3700
+	0    -1   -1   0   
+$EndComp
+$Comp
+L CONN_4 P2
+U 1 1 4EAA8D01
+P 4350 4050
+F 0 "P2" V 4300 4050 50  0000 C CNN
+F 1 "CONN_4" V 4400 4050 50  0000 C CNN
+	1    4350 4050
+	-1   0    0    -1  
+$EndComp
+$Comp
+L GND #PWR29
+U 1 1 4EAA8A6A
+P 8500 3400
+F 0 "#PWR29" H 8500 3400 30  0001 C CNN
+F 1 "GND" H 8500 3330 30  0001 C CNN
+	1    8500 3400
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR30
+U 1 1 4EAA8A65
+P 8900 3500
+F 0 "#PWR30" H 8900 3500 30  0001 C CNN
+F 1 "GND" H 8900 3430 30  0001 C CNN
+	1    8900 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR28
+U 1 1 4EAA8A62
+P 8100 3400
+F 0 "#PWR28" H 8100 3400 30  0001 C CNN
+F 1 "GND" H 8100 3330 30  0001 C CNN
+	1    8100 3400
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR31
+U 1 1 4EAA8A5F
+P 9250 3500
+F 0 "#PWR31" H 9250 3500 30  0001 C CNN
+F 1 "GND" H 9250 3430 30  0001 C CNN
+	1    9250 3500
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR32
+U 1 1 4EAA8A57
+P 9900 3550
+F 0 "#PWR32" H 9900 3550 30  0001 C CNN
+F 1 "GND" H 9900 3480 30  0001 C CNN
+	1    9900 3550
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R7
+U 1 1 4EAA8A32
+P 7500 3600
+F 0 "R7" V 7580 3600 50  0000 C CNN
+F 1 "1k" V 7500 3600 50  0000 C CNN
+	1    7500 3600
+	0    -1   -1   0   
+$EndComp
+$Comp
+L R R11
+U 1 1 4EAA8A2E
+P 8900 3150
+F 0 "R11" V 8980 3150 50  0000 C CNN
+F 1 "3k3" V 8900 3150 50  0000 C CNN
+	1    8900 3150
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R9
+U 1 1 4EAA8A2B
+P 8500 3050
+F 0 "R9" V 8580 3050 50  0000 C CNN
+F 1 "22k" V 8500 3050 50  0000 C CNN
+	1    8500 3050
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R6
+U 1 1 4EAA8A29
+P 7500 3000
+F 0 "R6" V 7580 3000 50  0000 C CNN
+F 1 "1k" V 7500 3000 50  0000 C CNN
+	1    7500 3000
+	0    -1   -1   0   
+$EndComp
+$Comp
+L R R13
+U 1 1 4EAA8A22
+P 9900 3250
+F 0 "R13" V 9980 3250 50  0000 C CNN
+F 1 "82" V 9900 3250 50  0000 C CNN
+	1    9900 3250
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R8
+U 1 1 4EAA8A1F
+P 8500 2150
+F 0 "R8" V 8580 2150 50  0000 C CNN
+F 1 "39k" V 8500 2150 50  0000 C CNN
+	1    8500 2150
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R10
+U 1 1 4EAA8A1D
+P 8900 2150
+F 0 "R10" V 8980 2150 50  0000 C CNN
+F 1 "33k" V 8900 2150 50  0000 C CNN
+	1    8900 2150
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R12
+U 1 1 4EAA8A07
+P 9900 2150
+F 0 "R12" V 9980 2150 50  0000 C CNN
+F 1 "220k" V 9900 2150 50  0000 C CNN
+	1    9900 2150
+	1    0    0    -1  
+$EndComp
+$Comp
+L BC237 Q2
+U 1 1 4EAA89E3
+P 9350 3100
+F 0 "Q2" H 9550 3000 50  0000 C CNN
+F 1 "BC337" H 9600 3250 50  0000 C CNN
+F 2 "TO92-EBC" H 9540 3100 30  0001 C CNN
+	1    9350 3100
+	-1   0    0    -1  
+$EndComp
+$Comp
+L DIODE D1
+U 1 1 4EAA899B
+P 3650 750
+F 0 "D1" H 3650 850 40  0000 C CNN
+F 1 "DIODE" H 3650 650 40  0000 C CNN
+	1    3650 750 
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR7
+U 1 1 4EAA895D
+P 3600 1800
+F 0 "#PWR7" H 3600 1800 30  0001 C CNN
+F 1 "GND" H 3600 1730 30  0001 C CNN
+	1    3600 1800
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR27
+U 1 1 4EAA88DA
+P 6650 3450
+F 0 "#PWR27" H 6650 3450 30  0001 C CNN
+F 1 "GND" H 6650 3380 30  0001 C CNN
+	1    6650 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR25
+U 1 1 4EAA88D5
+P 5950 3450
+F 0 "#PWR25" H 5950 3450 30  0001 C CNN
+F 1 "GND" H 5950 3380 30  0001 C CNN
+	1    5950 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR15
+U 1 1 4EAA888F
+P 4800 2750
+F 0 "#PWR15" H 4800 2750 30  0001 C CNN
+F 1 "GND" H 4800 2680 30  0001 C CNN
+	1    4800 2750
+	1    0    0    -1  
+$EndComp
+$Comp
+L DIODESCH D3
+U 1 1 4EAA8633
+P 5250 2550
+F 0 "D3" H 5250 2650 40  0000 C CNN
+F 1 "DIODESCH" H 5250 2450 40  0000 C CNN
+	1    5250 2550
+	1    0    0    -1  
+$EndComp
+$Comp
+L DIODE D2
+U 1 1 4EAA862B
+P 3650 1150
+F 0 "D2" H 3650 1250 40  0000 C CNN
+F 1 "DIODE" H 3650 1050 40  0000 C CNN
+	1    3650 1150
+	1    0    0    -1  
+$EndComp
+$Comp
+L INDUCTOR L3
+U 1 1 4EAA8616
+P 6300 2850
+F 0 "L3" V 6250 2850 40  0000 C CNN
+F 1 "INDUCTOR" V 6400 2850 40  0000 C CNN
+	1    6300 2850
+	0    -1   -1   0   
+$EndComp
+$Comp
+L INDUCTOR L2
+U 1 1 4EAA860E
+P 4975 2225
+F 0 "L2" V 4925 2225 40  0000 C CNN
+F 1 "150uH" V 5075 2225 40  0000 C CNN
+	1    4975 2225
+	1    0    0    -1  
+$EndComp
+$Comp
+L FUSE F1
+U 1 1 4EAA8605
+P 6650 2250
+F 0 "F1" H 6750 2300 40  0000 C CNN
+F 1 "FUSE" H 6550 2200 40  0000 C CNN
+	1    6650 2250
+	0    -1   -1   0   
+$EndComp
+$Comp
+L CP1 C3
+U 1 1 4EAA85ED
+P 5950 3150
+F 0 "C3" H 6000 3250 50  0000 L CNN
+F 1 "47u" H 6000 3050 50  0000 L CNN
+	1    5950 3150
+	1    0    0    -1  
+$EndComp
+$Comp
+L CP1 C4
+U 1 1 4EAA85E6
+P 6650 3150
+F 0 "C4" H 6700 3250 50  0000 L CNN
+F 1 "47u" H 6700 3050 50  0000 L CNN
+	1    6650 3150
+	1    0    0    -1  
+$EndComp
+$Comp
+L CP1 C2
+U 1 1 4EAA85E2
+P 3600 1550
+F 0 "C2" H 3650 1650 50  0000 L CNN
+F 1 "22u / 50V" H 3650 1450 50  0000 L CNN
+	1    3600 1550
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R2
+U 1 1 4EAA85C4
+P 4500 2150
+F 0 "R2" V 4580 2150 50  0000 C CNN
+F 1 "180" V 4500 2150 50  0000 C CNN
+	1    4500 2150
+	0    -1   -1   0   
+$EndComp
+$Comp
+L R R1
+U 1 1 4EAA85BA
+P 3400 2150
+F 0 "R1" V 3480 2150 50  0000 C CNN
+F 1 "0.47" V 3400 2150 50  0000 C CNN
+	1    3400 2150
+	0    1    1    0   
+$EndComp
+$Comp
+L GND #PWR16
+U 1 1 4EAA85A1
+P 4800 3450
+F 0 "#PWR16" H 4800 3450 30  0001 C CNN
+F 1 "GND" H 4800 3380 30  0001 C CNN
+	1    4800 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR4
+U 1 1 4EAA8599
+P 3000 3300
+F 0 "#PWR4" H 3000 3300 30  0001 C CNN
+F 1 "GND" H 3000 3230 30  0001 C CNN
+	1    3000 3300
+	1    0    0    -1  
+$EndComp
+$Comp
+L C C1
+U 1 1 4EAA8585
+P 3000 3050
+F 0 "C1" H 3050 3150 50  0000 L CNN
+F 1 "330p" H 3050 2950 50  0000 L CNN
+	1    3000 3050
+	1    0    0    -1  
+$EndComp
+$Comp
+L R R5
+U 1 1 4EAA8565
+P 5650 2850
+F 0 "R5" V 5730 2850 50  0000 C CNN
+F 1 "22k" V 5650 2850 50  0000 C CNN
+	1    5650 2850
+	0    1    1    0   
+$EndComp
+$Comp
+L R R4
+U 1 1 4EAA855B
+P 5100 2850
+F 0 "R4" V 5180 2850 50  0000 C CNN
+F 1 "100k" V 5100 2850 50  0000 C CNN
+	1    5100 2850
+	0    1    1    0   
+$EndComp
+$Comp
+L R R3
+U 1 1 4EAA8543
+P 4800 3150
+F 0 "R3" V 4880 3150 50  0000 C CNN
+F 1 "4k7" V 4800 3150 50  0000 C CNN
+	1    4800 3150
+	1    0    0    -1  
+$EndComp
+$Comp
+L GND #PWR8
+U 1 1 4EAA84C7
+P 3900 3300
+F 0 "#PWR8" H 3900 3300 30  0001 C CNN
+F 1 "GND" H 3900 3230 30  0001 C CNN
+	1    3900 3300
+	1    0    0    -1  
+$EndComp
+$Comp
+L MC34063 U1
+U 1 1 4EAA8411
+P 3900 2650
+F 0 "U1" H 4050 3000 60  0000 L CNN
+F 1 "MC34063" H 4000 2300 60  0000 L CNN
+	1    3900 2650
+	1    0    0    -1  
+$EndComp
+$Comp
+L BC307 Q3
+U 1 1 4EAA83EE
+P 9800 2700
+F 0 "Q3" H 10000 2600 50  0000 C CNN
+F 1 "BD136" H 10050 2850 50  0000 C CNN
+	1    9800 2700
+	1    0    0    1   
+$EndComp
+$Comp
+L BC237 Q1
+U 1 1 4EAA83E1
+P 8000 3000
+F 0 "Q1" H 8200 2900 50  0000 C CNN
+F 1 "BC337" H 8250 3150 50  0000 C CNN
+F 2 "TO92-EBC" H 8190 3000 30  0001 C CNN
+	1    8000 3000
+	1    0    0    -1  
+$EndComp
+$EndSCHEMATC
diff --git a/hardware/KiCAD/prolific.lib b/hardware/KiCAD/prolific.lib
new file mode 100755
index 0000000..5f677b6
--- /dev/null
+++ b/hardware/KiCAD/prolific.lib
@@ -0,0 +1,42 @@
+EESchema-LIBRARY Version 2.3  Date: 19/07/2012 18:59:01
+#encoding utf-8
+#
+# PL2303
+#
+DEF PL2303 U 0 40 Y Y 1 F N
+F0 "U" -350 700 60 H V C CNN
+F1 "PL2303" 200 700 60 H V C CNN
+DRAW
+S -450 650 400 -750 0 1 0 N
+X TxD 1 -750 600 300 R 50 50 1 1 I
+X DTR_N 2 -750 500 300 R 50 50 1 1 I
+X RTS_N 3 -750 400 300 R 50 50 1 1 I
+X Vdd_232 4 -750 300 300 R 50 50 1 1 I
+X RxD 5 -750 200 300 R 50 50 1 1 I
+X RI_N 6 -750 100 300 R 50 50 1 1 I
+X GND 7 -750 0 300 R 50 50 1 1 I
+X Vdd 8 -750 -100 300 R 50 50 1 1 I
+X DSR_N 9 -750 -200 300 R 50 50 1 1 I
+X DCD_N 10 -750 -300 300 R 50 50 1 1 I
+X VDD 20 700 -200 300 L 50 50 1 1 I
+X CTS_N 11 -750 -400 300 R 50 50 1 1 I
+X GND 21 700 -100 300 L 50 50 1 1 I
+X SHTD_N 12 -750 -500 300 R 50 50 1 1 I
+X TRI_MODE 22 700 0 300 L 50 50 1 1 I
+X EE_CLK 13 -750 -600 300 R 50 50 1 1 I
+X LD_MODE 23 700 100 300 L 50 50 1 1 I
+X EE_DATA 14 -750 -700 300 R 50 50 1 1 I
+X VDD_PLL 24 700 200 300 L 50 50 1 1 I
+X DP 15 700 -700 300 L 50 50 1 1 I
+X GND_PLL 25 700 300 300 L 50 50 1 1 I
+X DM 16 700 -600 300 L 50 50 1 1 I
+X PLL_TEST 26 700 400 300 L 50 50 1 1 I
+X VDD_3V3 17 700 -500 300 L 50 50 1 1 I
+X OSC1 27 700 500 300 L 50 50 1 1 I
+X GND_3V3 18 700 -400 300 L 50 50 1 1 I
+X OSC2 28 700 600 300 L 50 50 1 1 I
+X RESET 19 700 -300 300 L 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
+#End Library
diff --git a/hardware/MBus.sch b/hardware/MBus.sch
deleted file mode 100644
index bb96228..0000000
--- a/hardware/MBus.sch
+++ /dev/null
@@ -1,654 +0,0 @@
-EESchema Schematic File Version 2  date 07/12/2011 21:02:04
-LIBS:power
-LIBS:device
-LIBS:transistors
-LIBS:conn
-LIBS:linear
-LIBS:regul
-LIBS:74xx
-LIBS:cmos4000
-LIBS:adc-dac
-LIBS:memory
-LIBS:xilinx
-LIBS:special
-LIBS:microcontrollers
-LIBS:dsp
-LIBS:microchip
-LIBS:analog_switches
-LIBS:motorola
-LIBS:texas
-LIBS:intel
-LIBS:audio
-LIBS:interface
-LIBS:digital-audio
-LIBS:philips
-LIBS:display
-LIBS:cypress
-LIBS:siliconi
-LIBS:opto
-LIBS:atmel
-LIBS:contrib
-LIBS:valves
-LIBS:MBus-cache
-EELAYER 25  0
-EELAYER END
-$Descr A4 11700 8267
-encoding utf-8
-Sheet 1 1
-Title ""
-Date "7 dec 2011"
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-Text Notes 5550 2900 0    60   ~ 0
-approx 34V
-Text Notes 1300 1600 0    60   ~ 0
-Optional external\npower supply
-Text Notes 9700 3150 0    60   ~ 0
-MBus
-Text Label 8900 3250 0    60   ~ 0
-MBus-
-Wire Wire Line
-	9200 3250 8900 3250
-Wire Wire Line
-	8900 3250 8900 3500
-Connection ~ 8700 3500
-Wire Wire Line
-	8900 3500 8700 3500
-Connection ~ 7700 2900
-Wire Wire Line
-	7700 2950 7700 2900
-Wire Wire Line
-	5450 3050 5450 2900
-Wire Wire Line
-	5450 2900 8900 2900
-Wire Wire Line
-	8900 2900 8900 3050
-Wire Wire Line
-	6050 4050 5750 4050
-Wire Wire Line
-	5750 4050 5750 5050
-Wire Wire Line
-	5750 5050 3500 5050
-Wire Wire Line
-	3550 5300 3550 5250
-Wire Wire Line
-	3550 5250 3500 5250
-Wire Wire Line
-	2700 3200 2700 1800
-Wire Wire Line
-	2150 1800 2250 1800
-Connection ~ 7700 3900
-Wire Wire Line
-	7700 3950 7700 3450
-Wire Wire Line
-	6600 4050 6550 4050
-Connection ~ 7300 3750
-Wire Wire Line
-	6900 4250 6900 4450
-Wire Wire Line
-	7700 4450 7700 4550
-Wire Wire Line
-	8350 4150 8500 4150
-Connection ~ 8700 4000
-Wire Wire Line
-	8700 4000 8500 4000
-Wire Wire Line
-	8700 3950 8700 4050
-Connection ~ 5450 3900
-Wire Wire Line
-	5400 3900 5450 3900
-Connection ~ 2700 2200
-Wire Wire Line
-	2650 2200 2700 2200
-Wire Wire Line
-	2400 2400 2400 2350
-Wire Wire Line
-	2400 2350 2700 2350
-Wire Wire Line
-	3775 2975 3775 2950
-Connection ~ 3775 3600
-Wire Wire Line
-	3775 3575 3775 3600
-Wire Wire Line
-	3550 3600 3850 3600
-Connection ~ 3600 3900
-Wire Wire Line
-	3650 3900 3550 3900
-Connection ~ 4750 3900
-Wire Wire Line
-	5450 4400 5450 4500
-Wire Wire Line
-	3600 4450 3600 4500
-Connection ~ 1800 3200
-Wire Wire Line
-	1800 3200 1950 3200
-Wire Wire Line
-	3550 3500 3600 3500
-Wire Wire Line
-	3600 3500 3600 3200
-Wire Wire Line
-	3600 3200 3550 3200
-Wire Wire Line
-	3050 3200 3000 3200
-Wire Wire Line
-	3000 3200 3000 2950
-Wire Wire Line
-	1800 3550 1800 2950
-Wire Wire Line
-	1800 4300 1800 4350
-Wire Wire Line
-	2700 3200 2450 3200
-Wire Wire Line
-	1850 3850 1800 3850
-Wire Wire Line
-	1800 3850 1800 3900
-Wire Wire Line
-	2700 4200 2700 4350
-Connection ~ 3000 2950
-Wire Wire Line
-	1800 3550 1850 3550
-Wire Wire Line
-	3600 3900 3600 3950
-Wire Wire Line
-	4750 4400 4750 4500
-Wire Wire Line
-	4800 3900 4700 3900
-Wire Wire Line
-	4200 3900 4150 3900
-Wire Wire Line
-	3600 3800 3600 3750
-Wire Wire Line
-	3600 3750 3550 3750
-Wire Wire Line
-	4250 3600 4750 3600
-Wire Wire Line
-	4750 3600 4750 4000
-Wire Wire Line
-	1800 2950 3775 2950
-Wire Wire Line
-	2400 2800 2400 2850
-Wire Wire Line
-	2700 1800 2650 1800
-Connection ~ 2700 2350
-Wire Wire Line
-	5450 3550 5450 4000
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diff --git a/hardware/MBus_USB.pdf b/hardware/MBus_USB.pdf
old mode 100644
new mode 100755
index 2b6e48b..354162f
Binary files a/hardware/MBus_USB.pdf and b/hardware/MBus_USB.pdf differ
diff --git a/hardware/MBus_USB.txt b/hardware/MBus_USB.txt
index cd3be92..03261ec 100644
--- a/hardware/MBus_USB.txt
+++ b/hardware/MBus_USB.txt
@@ -3,22 +3,21 @@ The convertor is very simple - there are three main parts:
 - power Voltage converter
 - USB serial converter
 
-Voltage converter - "catalogue" use of MC34063 in step-up configuration set for about 34V output voltage and few tens of mA. You can use any other IC/setup which would do the job. Note that if you use other voltage output than 34V (note tha MBus limits) you need to adjust the voltage divider (see below) or use 12V Zener diode instead of R9.
+Voltage converter - "catalogue" use of MC34063 in step-up configuration set for about 34V output voltage and few tens of mA. You can use any other IC/setup which would do the job. Note that if you use other voltage output than 34V (note the MBus limits) you need to adjust the voltage divider (see below) or use 12V Zener diode instead of R9.
 
 MBus level converter - it is based on the original design from Uni Paderborn (http://www.m-bus.com/files/minimaster.tif or http://www.m-bus.de/pw1.shtml). It was just "inverted" to use common ground and low voltage IO signals. Also the 12V output voltage drop is done by simple divider (R9/R8) which is OK here (stable voltage, current is amplified).
 
 Basically no part of the convertor is critical - except of the 12V diff (see above) and current sensing R12.
 
 
+The USB serial convertor is not covered here in much detail as it does not make sense to build one. Get a USB serial cable - ideal one is an old phone data cable as these are without the RS232 level convertor (i.e. exactly what we want).
 
-The USB serial convertor is not covered here as it does not make sense to make one. Get a USB serial cable - ideal one is an old phone data cable as these are without the RS232 level convertor (i.e. exactly what we want).
-
-One sidenote explanation. Typical USB RS232 cable contains two main chips: USB to TTL/CMOS serial converter (this is the "smart" one - e.g. variants of FT232 or PL2303) and TTL/CMOS to RS232 voltage converter (variants of MAX232). We need just the first part as we have our own voltage converter - here CMOS/TTL to MBus instead.
-
+One sidenote explanation. Typical USB RS232 cable contains two main chips: USB to TTL/CMOS serial converter (this is the "smart" one - e.g. variants of FTDI Chip FT232 or Prolific PL2303) and TTL/CMOS to RS232 voltage converter (variants of MAX232). We need just the first part as we have our own voltage converter - here CMOS/TTL to MBus instead.
+Or you can buy this as a module.
 The bottom line is - get either a cable which does not have the RS232 converter or a cable which can be easily opened/dissected and the converter bypassed.
 
 
-Finally a small disclaimer - this is for educational purposes, there is no warranty of any sort.
-From technical perspective this works only for few slaves as it is only a simple converter and the power is very limited as well.
+Finally the disclaimer - this is for educational purposes, there is no warranty of any sort.
+From technical perspective this works only for few slaves as it is only a simple converter and the power is very limited as well. Tested with the bus of few tens of meters with speed up to 9600Bd with no problems.
 
 Contributed by Tomas Menzl.