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Hi folks, I am using four AA cells to give me 6v on a project. The battery pack is way too big for the application.
Is there a chance of changing the battery pack for a capacitor.
I will need to charge the cap too.
You could possibly combine the two ideas. Use smaller batteries with a cap in parallel to give you the large surge current required. But as stated earlier, more info, such as current and exact duration and frequency, is required before we could tell you the size of cap and battery.
if you compare the volumatic power density, to store the same power of 4 AA batteries you may need more space with capacitors. you better search for some rechargabe batteries that are small in pack and having 6V out.
I have copper tracking of 5mm width and 4cm length running in a parallel line on the inside of a cig box.
at the one end of the two lines I have the resistance wire bridging the tracks so that when I apply 6v (4 AA batteries) to the tracks the resistance wire glows and sets the flash wool off that is touching the wire.
The problem I have is that the batteries have to be concealed within a cig box?
Still holding a full pack of 20?
so I need to have a thin power supply that fits inside but will deliver the 6v, A larger voltage would not hurt as long as its does not blow the wire.
The wire is triggered by a push button switch or reed switch .
cheers all comments so far,
Sounds like you need a lot of juice for what is effectively a small glow plug
Have you bought the plug from a model shop... plane glow plugs work a treat
you should only need a couple of AA batteries... use rechargeable not pack bought
Flash cotton needs to be made furry and tampered gently down into your copper tube
use a tiny micro switch to ignite... best to also have a disarm/arm switch just for safety
Yes if possible the wire needs to remain in tact after the flash.
I am currently using a bank of 4 AA size batteries go give me perfect results as far as working voltage etc, but the pack is physically to big to be practical.
I have used the cap/bat out of one of those indoor helicopters and charged it using the six volt pack. on the side of the cap it says aec8111k ? I put a small led inline that goes out when I it is full.
I got nowhere when I did a search for the Cap online.
Someone sugested using a 10uf 2.7 super cap?
Thanks for your tips so far guys I really appreciate it
They work great as far as performance goes. I want the power source to be hidden inside the box.
Imagine you are holding a pack of cigs and then you open the packet to show it is full. When my other hand comes over to take the packet a switch is activated and a flash is made. the cig box would be nice if it looks normal.
hence the small or thin power source I am aiming for.
can you sketch whats really in your mind about how it should look like finally? single battery with tiny circuit to generate high voltage and charging a capacitor then discharge the cap may be another option. but how can you again accomodate all these stuffs within a full pack of cig box.
It sounds like this is part of an Illusion - could you just cut the cigs in half and re-pack them on top of your battery pack? Flip open the top and you will still see the cigs. Also / Alternatively, leave a couple of the cigs full length so you could remove one with a flourish to give the impression that they are all full length?