ELEC 332
Obtaining Non-stock Parts
The stock parts are expected to satisfy only basic requirements (e.g. resistors
and bypass capacitors).
Most of the parts for your
design projects beyond Exercise 4
will not be in stock and you will need to order them
or acquire them locally.
Ordering Parts
To order parts from a distributor or manufacturer,
follow the following procedure:
-
Create a list of the required parts.
For each item include the following information:
- Vendor.
- Manufacturer (if different from vendor).
- Manufacturer's part numer.
- Description.
- Vendor's catalog number (if any).
- Quantity
- Unit price.
- Total cost.
Here is an example of such a list:
Vendor
|
Manufacturer
|
Part No.
|
Description
|
Cat. No.
|
Quan.
|
Price
|
Total
|
Digi-Key | TI | SN7AC74D | Dual Flip-flop | 296-1063-5-ND | 10 | .43 | 4.30
|
| Kemet | T491B226M016AS | 22uf Tantalum 16V SMD | 399-3099-1-ND | 10 | .60 | 3.00
|
Mini-Circuits | | SBL-1 | Mixer | | 1 | 4.33 | 4.33
|
| | Total | | | | 11.63
|
-
Bring your list to the instructor for approval.
He will do this by signing it, so it should be a paper copy.
-
Take your approved list to Mr. Fly and tell him that it is for 332.
To save on shipping costs, parts are usually ordered on Fridays,
with delivery by the following Wednesday,
so plan your schedule accordingly.
You must get your list to Mr. Fly by 1:00 PM on Friday to insure
it will be included in the weekly order.
If possible, parts should be ordered either from Allied, Mouser, or Digi-Key.
Allied ususlly has better prices,
Mouser has faster delivery,
and Digi-Key
has a better parts selection interface.
For RF components such as mixers, amplifiers, transformers,
etc., Mini-Circuits is the best place to start. They have an enormous selection
and are willing to sell in small quantities.
If you use any other vendor, be sure to provide contact information (phone number
or web address).
Getting Parts Locally
If you need a part right away and it's not too exotic, you can try to get it
locally. There are a few local dealers (e.g. EPO, Ace, Fry's) that carry basic
components and will sell them to individuals. The procedure is:
- Find your part.
- Buy it.
Save your receipt.
- Take the receipt to the instructor for approval.
(There's a chance that this step will fail, so it would be wise
to seek approval beforehand.)
- Take the approved receipt to Mr. Dye.
- In the fullness of time you will be reimbursed.
One important caveat. You will not be reimbursed for sales tax.
You can get Rice's tax exemption number from Mr. Fly. Most vendors
will eventually accept this and not charge sales tax.