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Some old AVR projects
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avr-projects/keyboard-lamp
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Ondřej Hruška 34103b7065
improved keylamp schematic 		10 years ago
..
Makefile xx 10 years ago
README.md improved keylamp schematic 10 years ago
main.c xx 10 years ago
utils.h xx 10 years ago

README.md

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.