Appendix C: Cost breakdown
Item |
Supplier/Part # |
Cost |
| Atmel Mega32 MCU |
supplied by lab |
$8.00 |
| Solder board |
supplied by lab |
$2.50 |
| LCD |
supplied by lab |
$5.00 |
| 40 kHz transducer pair |
Jameco #139491 |
$6.95 |
| LM340 voltage regulator |
supplied by lab |
free |
| 74HC04N inverter |
supplied by lab |
free |
| 74HC14N Schmitt trigger |
supplied by lab |
free |
| LM311 comparator |
Digikey # 296-1389-5-ND |
$0.40 |
| Pushbuttons |
supplied by lab |
free |
| SPST on/off button |
All Electronics CAT #PB-123 |
$0.75 |
| 9 volt battery clip (x2) |
supplied by lab |
$1.00 |
| 9 volt battery (x2) |
supplied by lab |
$2.00 |
| Various resistors and capacitors |
supplied by lab |
free |
| Wire |
supplied by lab |
free |
| 16 MHz crystal |
supplied by lab |
free |
| Total |
|
$26.60 |
Copyright © 2004 by Vincent Ng and Jerry Wang. All rights reserved.