Timeline for Illuminate keyboard using Scroll Lock key
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 23, 2013 at 2:17 | comment | added | user1952398 | I think that if I use a dedicated USB port I would prefer drilling a hole on the table and putting a switch to it, but I wouldn't like to do that, it's too messy. I'll try to check the current to see if I have any chance to put the LEDs internally. | |
| Oct 21, 2013 at 14:41 | comment | added | Mike DeSimone | @AnindoGhosh My point was that the keyboard is already using some part of that 100 mA, and likely isn't declaring itself as a 500 mA load, so the LEDs will have to live with whatever current is left. If power can be obtained from a second USB port, then 100 mA it is. | |
| Oct 21, 2013 at 8:51 | comment | added | user1952398 | I was inspired by this video: youtube.com/watch?v=iOn72Y5DT6M there he uses the same voltage from the Scroll Lock LED so I'm hoping my idea is possible. | |
| Oct 21, 2013 at 8:36 | comment | added | user1952398 | Yeah a couple ~3v 20mA LEDs will do more than better. | |
| Oct 21, 2013 at 8:07 | comment | added | Anindo Ghosh | An USB port will supply 100 mA without any current demand negotiation. A quick search through the white LEDs at DigiKey shows a large number of options rated at 50 mA or below, with very decent illumination ratings. Also, the OP wants to illuminate a keyboard, not a room, so presumably the kind of power a small toy LED flashlight consumes (for instance 3 Volts 20 mA) ought to suffice, no? | |
| Oct 21, 2013 at 6:27 | history | answered | Mike DeSimone | CC BY-SA 3.0 |