N900 Hardware Flash Torch - Revision history

joerg_rw: /* Hardware */

2010-07-25T22:10:07Z

Hardware

← Older revision		Revision as of 22:10, 25 July 2010
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	==Hardware==		==Hardware==

-	The flash torch on the [[Nokia N900\|N900]] is a [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] two LED flash, which has several modes. It can flash brightly for a maximum of 0.5 s, with an LED current of no more than 320 mA, or be in torch mode for arbitrary duration, at a current of no more than 50 mA. Tests have not shown any deterioration of flash LEDs (brightness or color) during several hours of continuous torch mode	+	The flash torch on the [[Nokia N900\|N900]] is built from 2 high efficiency white power LEDs (type unknown), plus a [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] two LED flash controller, which has several modes. It can flash brightly for a maximum of 0.5 s, with an LED current of no more than 320 mA, or be in torch mode for arbitrary duration, at a current of no more than 50 mA. Tests have not shown any deterioration of flash LEDs (brightness or color) during several hours of continuous torch mode.

-	Exceeding these values however will cause irreversible hardware damage.	+	Exceeding these values however will probably cause irreversible hardware damage. Take care when accessing [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] directly to program the current limits! While range of values for indicator LED is 2.5mA to 17.5mA and thus probably relatively safe, the current settings for torch mode range from 50mA to 200mA(!), and for flash mode from 215mA to 500mA, while internal watchdog does not limit duration for torch mode and can be set to durations of up to 820ms for flash mode.

	The brightness of the LED in flashlight mode is approximately 20 lux at 1 m at the brightest spot in the beam.		The brightness of the LED in flashlight mode is approximately 20 lux at 1 m at the brightest spot in the beam.

joerg_rw: /* Hardware */

2010-07-25T13:24:54Z

Hardware

← Older revision		Revision as of 13:24, 25 July 2010
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	==Hardware==		==Hardware==

-	The flash torch on the [[Nokia N900\|N900]] is a [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] two LED flash, which has several modes. It can flash brightly for a maximum of 0.5 s, with an LED current of no more than 320 mA, or be in torch mode, at a current of no more than 50 mA.	+	The flash torch on the [[Nokia N900\|N900]] is a [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] two LED flash, which has several modes. It can flash brightly for a maximum of 0.5 s, with an LED current of no more than 320 mA, or be in torch mode for arbitrary duration, at a current of no more than 50 mA. Tests have not shown any deterioration of flash LEDs (brightness or color) during several hours of continuous torch mode

-	Exceeding these values will cause hardware damage.	+	Exceeding these values however will cause irreversible hardware damage.

	The brightness of the LED in flashlight mode is approximately 20 lux at 1 m at the brightest spot in the beam.		The brightness of the LED in flashlight mode is approximately 20 lux at 1 m at the brightest spot in the beam.

	It also contains a red indicator light, to indicate video is being recorded.		It also contains a red indicator light, to indicate video is being recorded.
		+	PR1.2 genuine camera in nightmode also uses red LED to indicate photo shots.

	==Software==		==Software==

amigadave: wikify slightly, add link

2010-06-10T13:33:46Z

wikify slightly, add link

← Older revision		Revision as of 13:33, 10 June 2010
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-	=Hardware=	+	==Hardware==
-	The flash torch on the [[Nokia N900\|N900]] is a two LED flash, which has several modes. It can flash brightly for a maximum of 0.5s, with an LED current of no more than ~~320mA~~, or be in torch mode, at a current of no more than ~~50mA~~.	+
		+	The flash torch on the [[Nokia N900\|N900]] is a [http://www.analog.com/en/power-management/display-and-lighting/adp1653/products/product.html ADP1653] two LED flash, which has several modes. It can flash brightly for a maximum of 0.5 s, with an LED current of no more than 320 mA, or be in torch mode, at a current of no more than 50 mA.

	Exceeding these values will cause hardware damage.		Exceeding these values will cause hardware damage.

-	The brightness of the LED in flashlight mode is approximately ~~20lux~~ at 1m at the brightest spot in the beam.	+	The brightness of the LED in flashlight mode is approximately 20 lux at 1 m at the brightest spot in the beam.

	It also contains a red indicator light, to indicate video is being recorded.		It also contains a red indicator light, to indicate video is being recorded.
-	=Software=	+
		+	==Software==
		+
	(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)		(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)

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	This is used by the built-in camera application, and a [https://garage.maemo.org/projects/flashlight-appl/ third party flashlight application], as well as being controllable by a [http://maemo.org/packages/view/lfocus/ live focus application which can also control the LEDs].		This is used by the built-in camera application, and a [https://garage.maemo.org/projects/flashlight-appl/ third party flashlight application], as well as being controllable by a [http://maemo.org/packages/view/lfocus/ live focus application which can also control the LEDs].

-		+	[[Category:N900 Hardware]]
-	[[Category:~~N900_Hardware~~]]	+
	[[Category:N900]]		[[Category:N900]]

speedevil at 22:48, 3 June 2010

2010-06-03T22:48:04Z

← Older revision		Revision as of 22:48, 3 June 2010
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		+	=Hardware=
	The flash torch on the [[Nokia N900\|N900]] is a two LED flash, which has several modes. It can flash brightly for a maximum of 0.5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.		The flash torch on the [[Nokia N900\|N900]] is a two LED flash, which has several modes. It can flash brightly for a maximum of 0.5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.

	Exceeding these values will cause hardware damage.		Exceeding these values will cause hardware damage.
-

	The brightness of the LED in flashlight mode is approximately 20lux at 1m at the brightest spot in the beam.		The brightness of the LED in flashlight mode is approximately 20lux at 1m at the brightest spot in the beam.

	It also contains a red indicator light, to indicate video is being recorded.		It also contains a red indicator light, to indicate video is being recorded.
-		+	=Software=
	(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)		(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)

Line 14:		Line 14:
	The driver is in drivers/media/video/adp1653.c		The driver is in drivers/media/video/adp1653.c

-	This is used by the built-in camera application, and a [https://garage.maemo.org/projects/flashlight-appl/ third party flashlight application]	+	This is used by the built-in camera application, and a [https://garage.maemo.org/projects/flashlight-appl/ third party flashlight application], as well as being controllable by a [http://maemo.org/packages/view/lfocus/ live focus application which can also control the LEDs].


	[[Category:N900_Hardware]]		[[Category:N900_Hardware]]
	[[Category:N900]]		[[Category:N900]]

amigadave: tidy

2010-04-15T10:23:38Z

tidy

← Older revision		Revision as of 10:23, 15 April 2010
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-	The flash torch on the ~~n900~~ is a two LED flash, which has several modes.	+	The flash torch on the [[Nokia N900\|N900]] is a two LED flash, which has several modes. It can flash brightly for a maximum of 0.5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.
-	It can flash brightly for a maximum of 0.5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.	+

	Exceeding these values will cause hardware damage.		Exceeding these values will cause hardware damage.
Line 11:		Line 10:
	(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)		(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)

-	The controls of the device are ~~apparantly~~ presented as video4linux ioctls related to the main camera device - /dev/video0 usually, and should show up in a suitable 'webcam' type viewer that can show arbitrary video4linux controls.	+	The controls of the device are apparently presented as video4linux ioctls related to the main camera device - /dev/video0 usually, and should show up in a suitable 'webcam' type viewer that can show arbitrary video4linux controls.

	The driver is in drivers/media/video/adp1653.c		The driver is in drivers/media/video/adp1653.c

joerg_rw at 08:04, 6 March 2010

2010-03-06T08:04:36Z

← Older revision		Revision as of 08:04, 6 March 2010
Line 1:		Line 1:
	The flash torch on the n900 is a two LED flash, which has several modes.		The flash torch on the n900 is a two LED flash, which has several modes.
-	It can flash brightly for a maximum of .5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.	+	It can flash brightly for a maximum of 0.5s, with an LED current of no more than 320mA, or be in torch mode, at a current of no more than 50mA.

-	Exceeding these values ~~may~~ cause hardware damage.	+	Exceeding these values will cause hardware damage.

speedevil at 18:02, 10 February 2010

2010-02-10T18:02:44Z

← Older revision		Revision as of 18:02, 10 February 2010
Line 5:		Line 5:


-	The brightness of the LED in flashlight mode is approximately 20lux at 1m at the ~~maximum brightness~~.	+	The brightness of the LED in flashlight mode is approximately 20lux at 1m at the brightest spot in the beam.

	It also contains a red indicator light, to indicate video is being recorded.		It also contains a red indicator light, to indicate video is being recorded.

speedevil: add measurements by me of light output. Cheap dealextreme light meter handheld - approximate numbers.

2010-02-10T18:01:43Z

add measurements by me of light output. Cheap dealextreme light meter handheld - approximate numbers.

← Older revision		Revision as of 18:01, 10 February 2010
Line 3:		Line 3:

	Exceeding these values may cause hardware damage.		Exceeding these values may cause hardware damage.
		+
		+
		+	The brightness of the LED in flashlight mode is approximately 20lux at 1m at the maximum brightness.

	It also contains a red indicator light, to indicate video is being recorded.		It also contains a red indicator light, to indicate video is being recorded.
Line 8:		Line 11:
	(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)		(See kernel source ./arch/arm/mach-omap2/board-rx51-camera.c for details)

-	The controls of the device are apparantly presented as video4linux ioctls related to the main camera device - /dev/video0 usually, and should show up in a suitable 'webcam' type viewer that ~~cah~~ show arbitrary video4linux controls.	+	The controls of the device are apparantly presented as video4linux ioctls related to the main camera device - /dev/video0 usually, and should show up in a suitable 'webcam' type viewer that can show arbitrary video4linux controls.

	The driver is in drivers/media/video/adp1653.c		The driver is in drivers/media/video/adp1653.c

speedevil at 15:31, 28 December 2009

2009-12-28T15:31:45Z

← Older revision		Revision as of 15:31, 28 December 2009
Line 12:		Line 12:
	The driver is in drivers/media/video/adp1653.c		The driver is in drivers/media/video/adp1653.c

		+	This is used by the built-in camera application, and a [https://garage.maemo.org/projects/flashlight-appl/ third party flashlight application]
		+
		+
		+	[[Category:N900_Hardware]]
	[[Category:N900]]		[[Category:N900]]

cas07: Add to Category N900

2009-12-14T23:36:27Z

Add to Category N900

← Older revision		Revision as of 23:36, 14 December 2009
Line 11:		Line 11:

	The driver is in drivers/media/video/adp1653.c		The driver is in drivers/media/video/adp1653.c
		+
		+	[[Category:N900]]