Hello folks,
I would like to design a battery pack for my camera as it uses a lot of power, circa 10W/hr, and I get though a lot of AA batteries
so would like to make a rechargeable 150 watt pack, that can run the camera using a coiled power cable that uses a 1.4 inch power jack
Time constraint: needs to be done within a month
Cost constraint: £100/$150<
Camera: Fuji S7000
Power required: 5V at 2A regulated DC
Camera batteries: 4xAA batteries
Pack: 6v x 22.5A (4x10AA) or 7.4v x 20.1A (2x5) NCR 18650
Problem:
I have looked at batteries and its hard to find one that is at the right current and ampage that I need, however I am struggling to find a 2 amp voltage regulator that will cover the required ampage, and would like to ask for some help
1, will this need a charge protection circuit to protect the batteries in the camera? - voltage regulation should do the job im thinking?
2, will it need a protection circuit for the battery pack as its custom? - i am guessing this is a must,
3, how to reduce current and volts though voltage regulation without wasting it as excessive heat through resistors - diodes?
4, as the pack will be around 1.5x4 (6v) in series, to get the current I need it will be several amps (5x2250)11.25A
or 3.7x2(7.4v x 3.35x5A) 16.75A
will a simple voltage regulator do the job?
5, just better to buy a lot of batteries?
idea was to use two 7608 type 5 volt voltage regulator in parallel with smoothing cap on the output side and possibly an electrolytic smoothing cap in the intake side but I dont think this will be this simple
thanks
Iain
I would like to design a battery pack for my camera as it uses a lot of power, circa 10W/hr, and I get though a lot of AA batteries
so would like to make a rechargeable 150 watt pack, that can run the camera using a coiled power cable that uses a 1.4 inch power jack
Time constraint: needs to be done within a month
Cost constraint: £100/$150<
Camera: Fuji S7000
Power required: 5V at 2A regulated DC
Camera batteries: 4xAA batteries
Pack: 6v x 22.5A (4x10AA) or 7.4v x 20.1A (2x5) NCR 18650
Problem:
I have looked at batteries and its hard to find one that is at the right current and ampage that I need, however I am struggling to find a 2 amp voltage regulator that will cover the required ampage, and would like to ask for some help
1, will this need a charge protection circuit to protect the batteries in the camera? - voltage regulation should do the job im thinking?
2, will it need a protection circuit for the battery pack as its custom? - i am guessing this is a must,
3, how to reduce current and volts though voltage regulation without wasting it as excessive heat through resistors - diodes?
4, as the pack will be around 1.5x4 (6v) in series, to get the current I need it will be several amps (5x2250)11.25A
or 3.7x2(7.4v x 3.35x5A) 16.75A
will a simple voltage regulator do the job?
5, just better to buy a lot of batteries?
idea was to use two 7608 type 5 volt voltage regulator in parallel with smoothing cap on the output side and possibly an electrolytic smoothing cap in the intake side but I dont think this will be this simple
thanks
Iain