Unbranded 100F capacitor

[MatthewMorgan]

I just ordered a 2.7V100F ultra capacitor and just thinking of ideas it could be used for.

Some ideas i am thinking of:
Flash light
Arduino RF Project
CB transmitter.

Witch of thoes ideas would you like to see?

[Kilrah]

What kind of ultracap? What specs?

Some ultracaps are made for things like RTC backup and have internal resistances so high they won't even power a flashlight...

[MatthewMorgan]

What kind of ultracap? What specs?

Some ultracaps are made for things like RTC backup and have internal resistances so high they won't even power a flashlight...

What kind of ultracap?  No brand on listing but most lickly samwha ELECTRIC DOUBLE LAYER CAPACITOR

What specs? 100F 2.7V


I saw a youtube video but he got another brand one.

[ZeTeX]

What kind of ultracap? What specs?

Some ultracaps are made for things like RTC backup and have internal resistances so high they won't even power a flashlight...

What kind of ultracap?  No brand on listing but most lickly samwha ELECTRIC DOUBLE LAYER CAPACITOR

What specs? 100F 2.7V


I saw a youtube video but he got another brand one.

Was it from aliexpress?

[bitseeker]

If they can hold their charge for long periods of time, I'd use them for a general-purpose power pack to drive portable/floating test equipment with low duty cycles (short run times, long down times). Might need a buck/boost converter to adapt to different devices.

Of course, even if they can't hold a charge for too long, they'd still be useful since they can charge up more quickly than rechargeable batteries.

[MatthewMorgan]

What kind of ultracap? What specs?

Some ultracaps are made for things like RTC backup and have internal resistances so high they won't even power a flashlight...

What kind of ultracap?  No brand on listing but most lickly samwha ELECTRIC DOUBLE LAYER CAPACITOR

What specs? 100F 2.7V


I saw a youtube video but he got another brand one.

Was it from aliexpress?

eBay

[JoeN]

I think you got the whole Choose Application, Order Parts thing backwards.   

[MatthewMorgan]

I think you got the whole Choose Application, Order Parts thing backwards.   

Parts are so cheap due to china so i end up ordering things due to videos on them.

[bitseeker]

One can draw inspiration from parts rather than problems. "Hmm, what can I make this do?" It's not so good for developing commercial products, but fine for projects. Whatever gets you motivated.

[karoru]

I think you got the whole Choose Application, Order Parts thing backwards.   

Sometimes you feel alone, lurking through aliexpress electronic parts at night, and all these Wang Hung Low beautiful things will just sing to you "I'm cheap, cool and my owner offers free postage for honorable customers" and you just can't say "no".

Then you get buried with 5 reels of general purpose PNP transistors, few ultracaps, strip of UV LEDs and microwave adjustable attenuator.

[bitseeker]

Shhh! Don't say stuff like that. It's contagious, you know. If you can't sleep, read a User Guide or something.

(But use an e-reader for those PDF manuals. Backlit screens keep you awake, or so "they" say.)

[MatthewMorgan]

I think you got the whole Choose Application, Order Parts thing backwards.   

Sometimes you feel alone, lurking through aliexpress electronic parts at night, and all these Wang Hung Low beautiful things will just sing to you "I'm cheap, cool and my owner offers free postage for honorable customers" and you just can't say "no".

Then you get buried with 5 reels of general purpose PNP transistors, few ultracaps, strip of UV LEDs and microwave adjustable attenuator.

Or end up with $2 50 packs of NE555
and about 800 resistors or 400 disk capacitors. or even £1.60 low voltage to high voltage converters and that is just eBay.

[MatthewMorgan]

This is the listing im getting it from:
http://www.ebay.co.uk/itm/1Pcs-NEW-Super-capacitor-2-7V100F-ultra-capacitor-farad-capacitor-2-7V-100F-/191893085132

[ZeTeX]

This is the listing im getting it from:
http://www.ebay.co.uk/itm/1Pcs-NEW-Super-capacitor-2-7V100F-ultra-capacitor-farad-capacitor-2-7V-100F-/191893085132

Fake :\
I have the exact same capacitors same series but 500F - which is bullshit because SAMWHA does not mention any 500F capacitors in their "Green-Cap" series.

[MatthewMorgan]

This is the listing im getting it from:
http://www.ebay.co.uk/itm/1Pcs-NEW-Super-capacitor-2-7V100F-ultra-capacitor-farad-capacitor-2-7V-100F-/191893085132

Fake :\
I have the exact same capacitors same series but 500F - which is bullshit because SAMWHA does not mention any 500F capacitors in their "Green-Cap" series.

100F is listed but 500F is not.

400F is the max listed but it would be interesting to see how good of a cap gets delivered.

I watched videos of cheap high fared caps from china and i would say they where not small caps at all.

I know chinese caps are not bad as they used to be.

[bitseeker]

Sounds like super cap specification analysis will be the first project (i.e., what are its true characteristics?).

[MatthewMorgan]

Sounds like super cap specification analysis will be the first project (i.e., what are its true characteristics?).

2 NMHI = 2.4v so for 100F would be 66.667 mAh to charge
So it would be a Mah meter to calculate the capacity.