Some old AVR projects
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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----+ |
'--| |--'
| ATMEL | Buttons
,--[180R]-|<|---| |--BRT----o/ o---,
| LED2 | ATtiny | |
| -| 13 |--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.