Where
to Purchase Parts for
Building
Sensors
Radioshack—go
to www.radioshack.com to find your
nearest store
Photocell—Cat.
No. 276-1657, $2.29 for five
different sizes
Mouser—www.mouser.com 1-800-346-6873
Photocell—Cat.
No. 338-54C348, $1.31 ea
Radioshack
LED
(yellow)—Cat. No. 276-021, $0.99 for 2
LED
(red)—Cat. No. 276-041, $0.99 for 2
LED
(green)—Cat. No. 276-030, $0.99 for 2
Resistor
(330 Ohm)—Cat. No. 271-1315, $0.49 for 5
Digikey—www.digikey.com
1-800-344-4539
LED
(yellow)—Cat. No. 160-1079-ND, $1.38 for 10
LED
(red)—Cat. No. P367-ND, $1.68 for 10
LED
(green)—Cat. No. P368-ND, $2.15 for 10
Resistor
(330 Ohm)—Cat. No. 330QBK-ND, $0.28 for 5
Radioshack
Thermister—Cat.
No. 271-110, $1.99 ea.
Resistor
(2.2 KiloOhm)—Cat. No. 271-1325, $0.49 for 5
Digikey
Thermister—Cat.
No. PNT119-ND, $0.90 ea
Resistor
(2.2 KiloOhm)—Cat. No. 2.2KQBK-ND, $0.28 for 5
Metal
LEGO® Plates
Pitsco—www.pitsco-LEGODACTA.com
1-800-362-4308
Electric
Plates—Cat. No. D779886, $6 for 3 (2x8 LEGO®
plate)
LEGO®—No
catalog on the web 1-800-453-4652
Electric
Plates—Cat. No. 5037, $6.75 for 9 (two 2x1,four 2x8,three 2x4 LEGO®
plates)
All
of the tools needed to make the sensors can be purchased at Wal-Mart and
Radioshack (or at almost any hardware store).