Item | Vendor | Price/EURO | Price/US$ |
---|---|---|---|
Mechanics | |||
Piezo tube scanner | Sensor Technology | 74 | 82 |
Brass for STM head | Koch und Krupitzer | 36 | 40 |
Machining of STM head | Peter Eggerstedt | 256 | 286 |
Fine-pitch screws and nuts | New Focus | 83 | 93 |
Import duties for screws | UPS | 22 | 24 |
Stepper motor | Conrad | 2 | 2 |
Electronics | |||
DSP evaluation board (Motorola DSP56002 EVM) | Elektronikladen Detmold | 175 | 195 |
Power supply components | Simons | 56 | 63 |
2 cases for electronics | Simons | 36 | 40 |
6 Op-amps OPA445 (40V) | Schuricht | 46 | 51 |
1 A/D converter MAX195 | Maxim | 0 | 0 |
2 D/A converters MAX542 | Maxim | 0 | 0 |
Low-bias op-amp OPA124 | RS | 10 | 11 |
diverse electronic components | RS, Simons | 72 | 80 |
Software | |||
Shareware “AudioTester” | Ulrich Müller | 26 | 30 |
LabView student edition | Addison Wesley | 56 | 63 |
Consumables | |||
HOPG samples | Scanning Probes Inc | 54 | 60 |
Tip wire (PtIr) | Scanning Probes Inc | 31 | 35 |
Total | 1035 | 1155 |
Please note that all parts were bought around 1998, so prices will probably have changed. Prices in EURO are what I paid, including sales tax, shipping and import duties, if applicable. (Well, actually they are converted from Deutsche Mark prices, which was our currency back then.) The US$ prices are for orientation only; they are merely the EURO prices multiplied by 1.12 - the approximate exchange rate at the time of purchase.
The mechanics turned out to cause a substantial part of the cost. You can probably get away much cheaper with a more improvised setup (which I did not dare, since I found the expected mechanical stability most difficult to judge). Better yet - enlist someone with a lathe and mill in the project…
I obtained free samples of the Maxim A/D and D/A converters. The MAX195 would have been about EUR 45 (US$ 50) in single quantities; I don’t know about the MAX542, but would guess another EUR 45 for two of them.