keyboard light readme

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Ondřej Hruška 10 years ago
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Keyboard Lamp
=============
This is a keyboard lamp with adjustable brightness, that remembers last brightnbess level even when powered off.
I've made it as a replacement for my broken ThinkLight.
It uses ATtiny13, and the schematic is something like this:
Vcc
|
+-------------+
| |
| +---u---+ |
+--| |--+ Buttons
| |
+--[180R]-|<|---| |--BRT----o/ o---+
| LED2 | | |
| --| t13 |--DIM----o/ o---+--- GND
GND | |
+--| |----+
| +-------+ | LED1
| | +-|<|--[47R]-- Vcc
GND | |
+-[10k]-|< Transistor NPN
|
GND
LED1 is the bright white LED, LED2 is an indicator that the brightness has been saved. You can leave LED2 out if you want.
**Fuses** and other settings can be found in the Makefile.
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