MobileRead Forums - View Single Post - Custom Booklight for the 505 (any interest?)

B@rt · 04-27-2008, 12:34 PM

Ohh, I like the lgp idea!

Any updates?

Have you considered using a lipo battery? The voltage is almost perfect, all you would need would be a low voltage cutoff circuit to protect the battery from overdischarging, and a resistor or potmeter to control brightness.
Of course if you want to go fancy a circuit with constant current dimming would be very nice, but for this application I don't think it is essential.
You would end up with a very flat rechargeable batterypack wich has much more capacity than the 2032 cells.

04-27-2008, 12:34 PM	#35
B@rt Junior Member Posts: 1 Karma: 10 Join Date: Mar 2008 Location: The Netherlands Device: SPR-505	Ohh, I like the lgp idea! Any updates? Have you considered using a lipo battery? The voltage is almost perfect, all you would need would be a low voltage cutoff circuit to protect the battery from overdischarging, and a resistor or potmeter to control brightness. Of course if you want to go fancy a circuit with constant current dimming would be very nice, but for this application I don't think it is essential. You would end up with a very flat rechargeable batterypack wich has much more capacity than the 2032 cells. Last edited by B@rt; 04-27-2008 at 06:57 PM.