@onionsayshello Oh ok, sorry I normally would have realised ( : just had allot of stuff (good and bad) going on recently so I missed the humour part lol.
@TheKaos90 To work out the capacity just use a multimeter set to measure capacitance. The voltage would be the maximum voltage the could be applied to the capacitor before it breaks down so it can be a little tricky to work that out without using a variable hv power supply. But if you want to use it for higher voltages then make sure to use thick insulation.
@Alex1M6 Well , i em an engineeer that uses only the brain and trash/household materials , no meters or fancy equipment , but you gave me the idea : the thicker the insulation , the higher the voltage.anyways , i need voltages around 1k , and the capacitance is to adapt through the plates surface.
P.S: The capacitance depends on the plate's contact surface , right ?
@TheKaos90 Yes, generally the thicker the insulation the higher the voltage. But also the bigger gap between the plates the lower the capacitance will be. Also with high voltage capacitors it helps to have no sharp edges as they leak charge.
BTW I think that every electrical engineer should have at-least a cheap (<£10) multimeter, they are not exactly cutting edge equipment and can be very useful even if you are into only using brain power alone ( :
@leaualorin Yes it have to be pretty big using this method. Alternatively you can buy small 15kV capacitors on ebay that come in various different capacitance values.
hey nice vid ive been trying to make a beer bottle/saltwater capacitor with the aluminum foil around the bottle &the rod inside with the saltwater but when i connect a 9 volt for a minute nothing comes up on my multimeter Please ANY suggestions thanks for your time
@BCQD4 Hi, I think that the beer bottle/foil designs are only really good for high voltage stuff or for use in circuits where the charge in the capacitor gets discharged into a load when there is still power coming into the capacitor becuase home-made ones will leak charge very fast as soon as you remove the power supply you are using to charge the capacitor with (ie as soon as you removed the 9V battery and connected up your volt meter).
Things that might help is to make sure that the foil...
@BCQD4 ...is dry and has no salt stuck to it and to try and keep the edges of the foil as smooth as possible as and sharp edges will leak charge as well.
if you can measure current with your multimeter try connecting that in series with the battery and capacitor and see if any current is draw for a brief period. One other thing to remember is that home-made capacitors will have a very small capacity so they will not store very much charge at all.
now put your finger in it, you'll have 99999999999999999 subs overnight :D
onionsayshello 1 week ago
@onionsayshello I have been shocked by it once and it hurts too much for me to want to touch it again, even for youtube.
Alex1M6 1 week ago
@Alex1M6 i was just havin' a joke, very interesting video by the way. keep it up :D
onionsayshello 4 days ago
@onionsayshello Oh ok, sorry I normally would have realised ( : just had allot of stuff (good and bad) going on recently so I missed the humour part lol.
Alex1M6 3 days ago
I just made a 10kV 10nf capacitor (15*25 cm), I used some kind of 0.5mm insulating foil and alluminium foil
TheError404 4 months ago
im a Tesla/Don Smith builder & this is a great vid, thanks buddy
kdkinen 4 months ago
Any idea on how to calculate voltage/capacity ?
TheKaos90 5 months ago
@TheKaos90 To work out the capacity just use a multimeter set to measure capacitance. The voltage would be the maximum voltage the could be applied to the capacitor before it breaks down so it can be a little tricky to work that out without using a variable hv power supply. But if you want to use it for higher voltages then make sure to use thick insulation.
Alex1M6 5 months ago
@Alex1M6 Well , i em an engineeer that uses only the brain and trash/household materials , no meters or fancy equipment , but you gave me the idea : the thicker the insulation , the higher the voltage.anyways , i need voltages around 1k , and the capacitance is to adapt through the plates surface.
P.S: The capacitance depends on the plate's contact surface , right ?
TheKaos90 5 months ago
@TheKaos90 Yes, generally the thicker the insulation the higher the voltage. But also the bigger gap between the plates the lower the capacitance will be. Also with high voltage capacitors it helps to have no sharp edges as they leak charge.
BTW I think that every electrical engineer should have at-least a cheap (<£10) multimeter, they are not exactly cutting edge equipment and can be very useful even if you are into only using brain power alone ( :
Alex1M6 5 months ago
@leaualorin Yes it have to be pretty big using this method. Alternatively you can buy small 15kV capacitors on ebay that come in various different capacitance values.
Alex1M6 9 months ago
hey nice vid ive been trying to make a beer bottle/saltwater capacitor with the aluminum foil around the bottle &the rod inside with the saltwater but when i connect a 9 volt for a minute nothing comes up on my multimeter Please ANY suggestions thanks for your time
BCQD4 10 months ago
@BCQD4 Hi, I think that the beer bottle/foil designs are only really good for high voltage stuff or for use in circuits where the charge in the capacitor gets discharged into a load when there is still power coming into the capacitor becuase home-made ones will leak charge very fast as soon as you remove the power supply you are using to charge the capacitor with (ie as soon as you removed the 9V battery and connected up your volt meter).
Things that might help is to make sure that the foil...
Alex1M6 10 months ago
@BCQD4 ...is dry and has no salt stuck to it and to try and keep the edges of the foil as smooth as possible as and sharp edges will leak charge as well.
if you can measure current with your multimeter try connecting that in series with the battery and capacitor and see if any current is draw for a brief period. One other thing to remember is that home-made capacitors will have a very small capacity so they will not store very much charge at all.
Hope this helps, Alex.
Alex1M6 10 months ago