Bill of Materials - Digi-Key Order Form

MegaSquirt FlyBack Board

This is the MegaSquirt Flyback Board ordering form for Digi-Key. It will allow you to assemble the MegaSquirt® FlyBack Board with just a printed circuit board (PCB) and heat sink. Note that some additional parts will be required, as noted near the bottom of the form.

Change any quantities to the numbers you want, and click the button to send your order to Digi-Key. If the default quantities are used, the price for the FlyBack Board parts should be $6.86, as of July 2004.

Quantities are as required for MegaSquirt FlyBack Board.

To order complete the following steps:

  1. Verify that you have the quantities you want for each item below.

  2. Then send your order to Digi-Key:

    You will be redirected to Digi-Key to confirm your order items and quantities. (Go to Ordering Homepage and "CREATE NEW ORDER" if you want to start over with an order after you have submitted it.)

  3. If you are not ordering more parts (from other 'Mega' forms), finalize your order by clicking on the 'finish order' button on the Digi-Key site. Verify your order, payment method, and shipping details. The order will not be complete until you have finished this step.

Qty.
MegaSquirt
Reference
Description
Digi-Key P/N
Unit
Price
Ext.
Price
per kit
(6) Resistor, 270 ohm,5%,0.5w,axial 0.054 0.54
(2) Resistor, 1K ohm,5%,0.25w,axial 0.056 0.28
Transistor, TIP32C 0.59 1.18
Transistor, TIP125 - PNP Darlington 0.68 1.36
Transistor, PN2222A 0.15 0.30
Diode, FR302 Fast Recovery 0.42 0.84
Diode, 36V Zener 0.36 0.72
Mica Insulator Kit 0.89 1.78
Sub-
total		 Shipping and processing may be extra, depending on your location and order size $6.86
Here are the other parts you'll need to build your FlyBack Board: Some MegaSquirt® Related Links:
Printed Circuit Board (PCB) - Bowling and Grippo

Aluminum angle - you need 7 inches (2@3½") - approx. 178mm, of ½" by ¾" (13 x 19 mm) aluminum angle, about .040" to .080" thick. You will use this to make the heat sink.

Machine screws and nuts You will need 8 #4-40 by ½" (13mm) screw and matching nuts to assemble the heat sink. These can be metals screws.

Hook-up wire - you will need about 3 feet (75cm) of 20-22 gauge wire to connect the boards.

MegaSquirt Site

MegaSquirt Forums

MegaSquirt FAQ

NOTES:

** Q103, Q106 - The PN2222A transistor (or ZTX450) will work as a drop-in replacement for the 2N2222A. The package is different (TO-92) such that the leads are in-lined, but it is in the "E-B-C" order just like the 2N2222A. For the metal-can 2N2222A, if you hold the device, looking from the top, with the tab pointing towards the 2:00 position on the clock, the emitter is at 12:00, the base is at 9:00, and the collector is at 6:00. For the PN2222A, if you hold the flat side facing left (or 9:00 on the clock), looking from the top again, the emitter is on the top or 12:00 position, the base is in the center, and the collector is down at 6:00. Simply bend out the center lead towards the flat side (towards the 9:00 position) and the part will drop right in the hole.

If you are replacing your flyback circuit because of a failure, you should replace the FETs (2 @ IRFIZ34N-ND - $1.20 each) and FET driver (1 @ IXDI404PI-ND - $1.68 ea.). You also may want to put a socket in for the FET driver, use AE7208-ND - $0.35.

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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.
©2004, 2005 Bruce Bowling and Al Grippo. All rights reserved. MegaSquirt® and MicroSquirt® are registered trademarks. This document is solely for the support of MegaSquirt® boards from Bowling and Grippo.