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Topic: Questions regarding Voltage regulators (Read 1 time) previous topic - next topic

oric_dan


Keep in mind, most 9v rechargeables (at least the ones I've used) have significantly less capacity than alkalines.  I tried some in a wireless guitar body pack.  1-2 hours, tops.  And the charger snapped so tight to the terminals, it took the top off of one.  Not worth the effort at all.

Only 200 mA-hr - certainly not worth $10.

http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_244620_-1

SirNickity

Keep in mind, most 9v rechargeables (at least the ones I've used) have significantly less capacity than alkalines.  I tried some in a wireless guitar body pack.  1-2 hours, tops.  And the charger snapped so tight to the terminals, it took the top off of one.  Not worth the effort at all.

Cue2

Thanks CrossRoads for the insightful read about V.reg damage. Thanks everyone for the advice regarding the battery and daisy chaining regulators too. It is a standalone Atmega328p project as some of you may have guessed. I currently use a power jack but the the thought of using a 9V battery crossed my mind since I have some spare rechargable 9Vs but I will look into the better suited alternative batteries.

retrolefty


Quote
the OP is probably talking about a standalone atmega328 or similar arrangement,

Ha, you read a lot more into his post than I did, LOL. He better not be drawing more than
about 25 mA total load, else the 9V battery won't last very long, cf 500 mA-hr of energy,

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=198791&langId=-1&storeId=10001&productId=198791&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView




And at two for $5 I see in drug stores they are a very uneconomical method of powering even a minimum arduino based project. They do look cute though.  ;)

oric_dan

Quote
the OP is probably talking about a standalone atmega328 or similar arrangement,

Ha, you read a lot more into his post than I did, LOL. He better not be drawing more than
about 25 mA total load, else the 9V battery won't last very long, cf 500 mA-hr of energy,

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?freeText=198791&langId=-1&storeId=10001&productId=198791&search_type=jamecoall&catalogId=10001&ddkey=http:StoreCatalogDrillDownView


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