Print PDF
Favorite
Email
Step 2LED Selection
On this watch, yellow and red '1206' size LEDs were used with a 56 ohm current limiting resistor. The colors were chosen for low cost. Red, yellow, and orange LEDs are about 10 cents each, while blue LEDs are 40 cents and above. Besides, LED blue is decidedly uncool now. If you find some purple, let me know.
The picture shows the 5 LED types I auditioned.
Mouser Part # Manufacturer Color Cost
859-LTST-C171KRKT Lite-On SMT LED Red, Clear $0.130
859-LTST-C171KSKT Lite-On SMT LED Yellow, Clear $0.130
859-LTST-C150KFKT Lite-On SMT LED Orange, Clear $0.130
638-121SURCS530A28 Everlight LED SMD Red Water Clear $0.110
638-1121UYCS530A28 Everlight LED SMD Yellow Water Clear $0.110
Everlight red and yellow were used on the prototype watch. I like Lite-On red and orange better, they will be used on the next watch I make.
The picture shows the 5 LED types I auditioned.
Mouser Part # Manufacturer Color Cost
859-LTST-C171KRKT Lite-On SMT LED Red, Clear $0.130
859-LTST-C171KSKT Lite-On SMT LED Yellow, Clear $0.130
859-LTST-C150KFKT Lite-On SMT LED Orange, Clear $0.130
638-121SURCS530A28 Everlight LED SMD Red Water Clear $0.110
638-1121UYCS530A28 Everlight LED SMD Yellow Water Clear $0.110
Everlight red and yellow were used on the prototype watch. I like Lite-On red and orange better, they will be used on the next watch I make.
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
