Thread: Charging the 7.2 Volt Batteries
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Unread 13-01-2006, 16:16
BrianBSL BrianBSL is offline
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Re: Charging 7.2V Backup Battery
I also see some weirdness in this circuit, but for anyone that wants to build it, I already put together the list of parts from Mouser. Sorry for the horrid formatting (this is a paste straight from their cart). The Tantalum cap's can probably be substituted for ceramics if you have them laying around or for cost reasons. Here are the part #'s that I chose:

Code:
610-CZ5345B   	 CZ5345B  	 Central Semi Diodes - Zener
DO-201 8.7V 5.0W
	$ 0.520 	

511-LM317T 	LM317T 	ST Voltage Regulators
TO-220AB 1.2-37V Adj Positive - RoHS COMPLIANT per producer documentation
	$ 0.460 	

625-1N5820 	1N5820 	Vishay Semiconductor Schottky Rectifiers
DO-204AL Vr/20V Io/3A BULK
	$ 0.290 	

271-221-RC 	271-221-RC 	Xicon 1/4W 1% Metal Film Resistors
221ohms 1% 50PPM - RoHS/Pb-FREE per producer documentation
	$ 0.090 	

271-1.24K-RC 	271-1.24K-RC 	Xicon 1/4W 1% Metal Film Resistors
1.24Kohms 1% 50PPM - RoHS/Pb-FREE per producer documentation
	$ 0.090 	

294-43-RC 	294-43-RC 	Xicon 1W 5% Carbon Film Resistors
43ohms 5% - RoHS/Pb-FREE per producer documentation
	$ 0.140 	

294-22-RC 	294-22-RC 	Xicon 1W 5% Carbon Film Resistors
22ohms 5% - RoHS/Pb-FREE per producer documentation
	$ 0.140 	

80-T350A104K035 	T350A104K035AS 	Kemet Dipped Radial Tantalum Capacitors
35V 0.1uF 10% - RoHS non-compliant/CONTAINS Pb
	$ 0.300
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