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--- led_light_controller [2015/02/21 12:08] – created kingkevin
+++ led_light_controller [2015/02/21 12:36] – moved pictures kingkevin
@@ Line 1: / Line 1: @@
 This article is about the LED light installation in my room.
 LED strips, and ATX power supply, and a custom board are used.
+The brightness of the strips can be controlled using a remote.
+Different colour temperatures allow different ambiance.
 {{led_light_controller:dsc00609.jpg?250|}}
@@ Line 26: / Line 29: @@
 The source files are available on [[https://git.cuvoodoo.info/kingkevin/led-controller/tree/master/pcb|git]].
 PDF and gerber of schematich and layout are available in {{led_light_controller:hardware-release_va.tar.gz|release vA}}.
+======= firmware ======
+The board uses an Atmel ATmega328P micro-controller.
+It allows to set the brightness of the LED strips using PWM.
+This can be controlled over the serial port or an infra-red remote using NEC codes.
+x5 channels are provided by the board.
+modes are used to save brightness settings.
+The source code is available on [[https://git.cuvoodoo.info/kingkevin/led-controller/tree/master/firmware|git]].
+The firmware binary is available {{led_light_controller:led-controller_firmware.tar.gz|here}}.
+======= ATX ======
+A 4.7Ω power resistor is used to draw power on the 5 V rail.
+This improves the 12 V rail.
+The ATX [[http://www.formfactors.org/developer%5Cspecs%5CPower_Supply_Design_Guide_Desktop_Platform_Rev_1_2.pdf|Power Supply Design Guide for Desktop Platform Form Factors]] ({{led_light_controller:atx_psdg_v1.2.pdf|archive}}) shows the relation between the load of these two rails.
+And testing it {{led_light_controller:power_measurement.ods|confirms it}}.
+{{led_light_controller:measure.jpg?450px|}}
+{{led_light_controller:power_measurement.svg?450px|}}