Texas Instruments TI-89 Tip List page 149

Graphing calculator

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Table of Contents

D1, D2, D3, D4

Q1, Q2, Q5, Q8

Q3, Q4, Q6, Q7

R1, R2, R3, R4

Printed-circuit board (PCB)

DB9 female connector

4-40 machine screws

4-40 hex nuts

3/32" female jack

Hook-up wire

All of these parts should be in stock at any RadioShack, but your particular RadioShack may have to

order some of them. Also, prices may vary slightly from store to store. The 4-40 machine screws and

nuts are used to mount the DB9 connector to the enclosure. The individual wires of the phone cable

are used for jumper wires on the PCB. Considering that the component cost is about $19, and you can

buy the TI cable for $20, you aren't saving much money. However, much of the cost is in the enclosure

and mounting hardware. You can save some money by using creative alternatives.

This figure shows one possible component layout on the 276-150 PCB:

RadioShack parts list for BCC deluxe

1N914/1N4148

100kohm, 1/8W, 10%

47kohm, 1/8W, 10%

4" x 2" x 1"

4-conductor 24GA solid

phone cable, 1 foot

RadioShack part number

276-1122 (pack of 10)

276-1347 (pack of 5)

276-1342 (pack of 5)

Total cost US$

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