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Author Topic: Problems with capacitors  (Read 765 times)
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fred
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« Reply #25 on: September 03, 2020, 01:08:38 PM »

Thank you Fred....cool stuff! So where in line wiring would I put resisters in?
George, I have ordered a few 10f from amazon, won't be here for a month tho,,,, Cry
The sopwith needs finishing anyways.....

 
Not resistors .. but  Diodes. cheap easy each one drops (memory tho) 0.4 volts so a couple? in series with the battery outs. 
My 2.6 gm  10F caps from:
https://usa.banggood.com/5pcs-2_7V-10F-Cylindrical-Ultra-Super-Farad-Capacitor-High-Power-Capacitance-Supercap-10-x-26mm-p-1218354.html?rmmds=myorder&cur_warehouse=CN 
took about 2.5 weeks
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kaintuck
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« Reply #26 on: September 03, 2020, 01:13:05 PM »

Thanks George, next payday, I'll get some like you got...
Fred, thank you....I'm just now learning electric parts....diodes!
Marc
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ghcrash
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« Reply #27 on: September 03, 2020, 02:08:57 PM »



[/quote] 
 
My 2.6 gm  10F caps from:
https://usa.banggood.com/5pcs-2_7V-10F-Cylindrical-Ultra-Super-Farad-Capacitor-High-Power-Capacitance-Supercap-10-x-26mm-p-1218354.html?rmmds=myorder&cur_warehouse=CN 
took about 2.5 weeks

[/quote]

Those sound pretty good too.   Order you capacitor from wherever you want   But check the voltage, capacitance, weight and ESR to find the right one for you.

 
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George
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« Reply #28 on: September 14, 2020, 02:43:30 PM »

Geaorge,
I received my super capacitors today. so at lunchtime I charged one up with my small 2 AA cell charger...then connect the wires to the china geared motor...it works!...I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors? And will I still use a 3v power source for charging?
marc
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OZPAF
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« Reply #29 on: September 14, 2020, 07:59:20 PM »

Quote
I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors?
Why?

Providing you keep your wiring short with soldered joints(keep resistance to a minimum) 3V will work well. They will in general be ok to 3.5V (but check with a test first) Using 3V on my arrangement of a 720 coreless motor direct drive to a 65mm(about 2.25") gave 36gms of thrust initially dropping to around 24 g. more than enough to give my 20g model a good climb.

John
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ghcrash
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« Reply #30 on: September 14, 2020, 11:18:43 PM »


I  think that John and I may have read your question differently.

Yes you can wire the 3v capacitors in series then charge the series pair to 6v.  That will take a 6v charging source, a 3v charge is just going to give you 3 v.   But, like John was implying, why would you want to if you can get 30+ grams of thrust form a 7mm motor on 3 volts.  What might make more sense is to wire the capacitors in parallel for a longer run time.

Did John of I answer your question?

    George
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George
kaintuck
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« Reply #31 on: September 15, 2020, 11:05:54 AM »

thanks ya'll..........I weighed them, yellow 15F was 4.8gm, blue 15F was 4.7,black 10F 3.08gm....
geared motor switch and prop 9.7gm.....
marc
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kaintuck
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« Reply #32 on: September 15, 2020, 03:10:25 PM »

take a look at #JUWT1105MCD on digikey site......tiny?
marc
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TimWescott
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« Reply #33 on: September 15, 2020, 04:43:11 PM »

Geaorge,
I received my super capacitors today. so at lunchtime I charged one up with my small 2 AA cell charger...then connect the wires to the china geared motor...it works!...I wonder if I can get the voltage up to 6v by wiring in series w/o ruining my new capacitors? And will I still use a 3v power source for charging?
marc

If you take a motor/gear/prop assembly that's designed for 3V and put 6V to it you will overload the components.  If you have a motor &c. designed for 6V -- sure, go for it.  Or use a cap rated for 6V.

If the motor's designed for 3V -- put two caps in parallel, or use one higher capacity cap.
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ghcrash
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« Reply #34 on: September 15, 2020, 07:19:13 PM »

take a look at #JUWT1105MCD on digikey site......tiny?
marc

Please note that is 1F capacitor, not a 10F cap.
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George
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« Reply #35 on: September 16, 2020, 07:13:33 AM »

I saw that George ...but it looks tiny...I have one geared motor, I think a 4/7......just thinking...
Marc
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kaintuck
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« Reply #36 on: September 20, 2020, 01:07:22 PM »

 Grin here's my 10f super capacitor in the nose of sopwith comic. The chinee geared motor runs with this prop with good power. The whole unit is pulled, charged, then replaced...small slide switch to turn her on....
https://ibb.co/PTbgC0R
My mechanics aren't very good at sheet work....the gun positions are eliminated and a Lewis gun will be mounted on the upper wing...night flash from a machine gun blinds you....them dirigibles have to be downed fast, before they reach their drop points!!! Cheesy
https://ibb.co/LhRFnPT
Marc
Problems with capacitors
Problems with capacitors
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ghcrash
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« Reply #37 on: September 20, 2020, 01:47:59 PM »


Looks good!   Keep us posted as you finish the build, and then when you fly it.

    George
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George
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« Reply #38 on: September 20, 2020, 08:48:42 PM »

Looking forward to the maiden of this model. Neat work.

John
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