Megasquirt V3.0 DIY board parts list (BOM)

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Here are the parts used to assemble the V3.0 main board:

Please note that these Digikey part numbers are provided for reference only, other suppliers are available and parts numbers will be superceded over time.

QTY
Needed

MegaSquirt References

Component Name

Digi-Key
Part Num.

Circuit

10

C1,C3,C13,C18,C19,
C23,C26,C27, C28, C29

Capacitor 0.1µF 50V 10% CER RADIAL - X7R

399-4329-ND


3

C11,C21*,C32

Capacitor 0.01µF 50V 10% CER RADIAL

399-2075-ND or 399-4326-ND


2

C16,C17

Capacitor TANT 22µF 25V 10% RAD

399-1420-ND or 399-3584-ND


4

C2,C9, C10, C30

Capacitor 0.22µF 50V 10% CER RADIAL - X7R

399-2083-ND or 399-4353-ND


1

C31

Capacitor 0.001µF 50V 10% CER RADIAL - X7R

399-2017-ND


1

C20*

Capacitor 0.033µF 50V 10% CER RADIAL

399-4361-ND

MS1 only

2

C14,C22

Capacitor TANT 4.7µF 25V 10% RAD

399-3559-ND


1

C24*

Capacitor 47PF 200V 5% CER RADIAL

399-1911-ND

MS1 only

1

C25*

Capacitor 22PF 200V 5% CER RADIAL

399-1908-ND

MS1 only

5

C4,C6,C8,C12,C15

Capacitor 0.001µF 100V 10% CER RADIAL - X7R

399-4202-ND


2

C5,C7

Capacitor 1.0µF 50V 10% CER RADIAL - X7R

399-2102-ND or 399-4389-ND


7

D1-3,D9-11

Diode GPP 50V 1A DO-41

1N4001DICT-ND


1

D12

Diode Zener 24V 1W 5% DO-41

1N4749ADICT-ND


1

D13

Diode Zener 12V 1W 5% DO-41

1N4742ADICT-ND


3

D14,D15,D16

LED Red Translucent Round

67-1102-ND


2

D17,D18

Diode Schottky 40V 1A DO-41

1N5819DICT-ND


1

D19

Diode Zener 5.6V 1W 5% DO-41

1N4734ADICT-ND


3

D4,D8, (D2 coil-)

Diode Zener 22V 1W 5% DO-41

1N4748ADICT-ND


2

D5,D7

Diode FAST REC 100V 3A DO-201AD

FR302DICT-ND

Active flyback

3

D6,D20,D21

Diode Zener 36V 1W 5% DO-41

1N4753ADICT-ND


1

D24

Diode 1N4148

1N4148DICT-ND


2

F1, F2

Polyswitch RXE Series 0.50A HOLD

RXEF050-ND


2

L1,L2

Choke RF Varnished 1UH 20%

M8388-ND


1

MOV1

Surge absorber 20MM 22V 2000A ZNR

P7315-ND


1

P1

Connector D-SUB RECPT R/A 9POS PCB AU

A23305-ND/A32119-ND


1

P2

Connector D-SUB PLUG R/A 37POS PCB AU

A23289-ND or A32103-ND


2

Q1,Q5

HEX/MOSFET N-CH 60V 20A TO-220FP

IRFIZ34GPBF-ND


1

Q16

Ignition driver BIP373 TO220

N/A

High-Current Ignition Driver

2

Q2,Q4

Transistor NPN 45V 1000MA TO-92

ZTX450-ND


2

Q22,Q23

Transistor PNP 100V 1000MA TO-92

ZTX553-ND


2

Q3,Q11

Transistor PNP 6A 100V HI PWR TO220AB

497-2629-5-ND


9

Q6,Q7,Q8,Q10,Q13,
Q14,Q15,Q19,Q20

Transistor NPN SS GP 200MA TO-92

2N3904FS-ND


2

Q9,Q12

Transistor PNP DARL -100V -5A TO-220

TIP125TU-ND

Active flyback

7

R16,R19,R26,R27,
R29

Resistor 1.0K Ohm 1/8W 5% Carbon Film

1.0KEBK-ND


2

R42,R55

Resistor 10K Ohm 1/8W 5% Carbon Film (or 1.0K)

10KEBK-ND (or 1.0KEBK-ND)


9

R1*,R6,R14,R17,R21*,
R44,R48,R53,R54

Resistor 10K Ohm 1/8W 5% Carbon Film

10KEBK-ND


5

R2,R9,R10,R32,R36

Resistor 1.0K Ohm ¼W 5% Carbon Film

1.0KQBK-ND


3

R22*,R49,R50

Resistor 100K Ohm 1/8W 5% Carbon Film

100KEBK-ND


2

R11,R51

Resistor 1.0M Ohm 1/8W 5% Carbon Film

1.0MEBK-ND


1

R23*

Resistor 10M Ohm 1/8W 5% Carbon Film

10MEBK-ND

MS1 only

2

R15,R20

Resistor 22 Ohm ¼W 5% Carbon Film

22QBK-ND


2

R4,R7

Resistor 2.49K Ohm ¼W 1% Metal Film

2.49KXBK-ND


6

R18,R30,R31,R33,
R34,R35

Resistor 270 Ohm ¼W 5% Carbon Film

270QBK-ND


3

R24,R25,R28

Resistor 330 Ohm ¼W 5% Carbon Film

330QBK-ND


1

R12

Resistor 390 Ohm ½W 5% Carbon Film

390H-ND


1

R13

Resistor 4.7K Ohm 1/8W 5% Carbon Film

4.7KEBK-ND


1

R3

Resistor 51K Ohm 1/8W 5% Carbon Film

51KEBK-ND


2

R37,R38

Resistor .05 Ohm 20W TO220

TAH20PR050J-ND

Current Limiting

2

R39,R40

Resistor 1.0 Ohm ½W 5% Carbon Film

1.0H-ND


1

R43

Resistor Current Sense .010 Ohm 3W

13FR010-ND

High-Current Ignition Driver

2

R45, R46

Resistor 10K Ohm ¼W 5% Carbon Film

10KQBK-ND


1

R47

Resistor 47K Ohm 1/8W 5% Carbon Film

47KEBK-ND


2

R5,R8

Resistor 2.2K Ohm ¼W 5% Carbon Film

2.2KQBK-ND


1

R52

Trim Pot 100K Ohm TOP ADJ

CT94W104-ND


1

R56

Trim Pot 10K Ohm TOP ADJ

CT94W103-ND


1

U3

Optoisolator w/base 6-DIP

160-1300-5-ND


1

U4

MOSFET Driver LS 4A DUAL 8DIP

IXDI404PI-ND


1

U5

Regulator LDO TO-220

LM2937ET-5.0-ND


1

U6

DVR/RCVR 5V RS232 16 DIP

497-2055-5-ND


1

U7

OpAmp Dual SGL SUPP HS 8DIP

(LM2904NFS-ND)
MC33072PGOS-ND
or 296-7112-5-ND


1

Y1*

Crystal 32.768KHz CYL 12.5PF

300-1002-ND

MS1 only

2

NA

Insulating kit TO-220

4724K-ND


1

NA

Socket Machine Pin ST 40POS GOLD

AE7240-ND or AE10018-ND


1

Optional

Socket Machine Pin ST 16POS GOLD (Max232)

AE7216-ND or AE10013-ND

Optional socket

2

Optional

Socket Machine Pin ST 8POS GOLD (IXDI404PI)

AE7208-ND or AE10011-ND

Optional socket

1

Optional

Socket Machine Pin ST 6POS GOLD (4N25)

AE7300-ND or AE10021-ND

Optional socket

1

NA

Connector DB-37 Female;

237F-ND

Cables

1

NA

DB-37 Hood;

937GM-ND

Cables

1

Optional

DB-9 Straight-through cable
(6.5 feet/2 meters)

AE1020-ND

Cables

* = MS1 only. The 32kHz crystal and circuit are not used on MS2 or MS3 installs.

MegaSquirt® and MicroSquirt® controllers are experimental devices intended for educational purposes.
MegaSquirt® and MicroSquirt® controllers are not for sale or use on pollution controlled vehicles. Check the laws that apply in your locality to determine if using a MegaSquirt® or MicroSquirt® controller is legal for your application.

©2005, 2009 Bruce Bowling and Al Grippo. All rights reserved. MegaSquirt® and MicroSquirt® are registered trademarks.

Last revised James Murray, 18th October 2010