Lance-Flammes en tout genre: Infos, conseils, ressources.
 
AccueilFAQS'enregistrerConnexion

Partagez | 
 

 Electronics

Voir le sujet précédent Voir le sujet suivant Aller en bas 
Aller à la page : 1, 2  Suivant
AuteurMessage
Invité
Invité
avatar


MessageSujet: Electronics    Jeu 3 Nov - 1:05

Im into designing and building custom electronics from modifying Xbox controllers to building Tesla coils!

what if anything have you built, modified or working on?

Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Jeu 3 Nov - 1:09

I have worked on home built high current transformers to xboxes to computers and even ICs.
im working on a 4 or 5 foot tall Tesla coil hopefully giving off 1 million volts with 4 foot arcs now but i need to gather up money for wire
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Jeu 3 Nov - 1:13

TC ? Very Happy

Yeah, I like dangerous science like HV, laser, ... and old school things too Wink

There are some articles that talk about on my website if you want to read them (in french, but pictures are universal Razz) Smile

edit: yes, enamelled copper wire is hard to find and very expensive...

I have a TC project too, about 5-6 feet tall and a goal of one million volts Very Happy

The power supply is based on 4 MOTs in serie for about 8 kV ~ (and 10-12 in DC) at 0.5A... don't touch the wrong wire... What a Face

But I still miss a lot of elements... I have 5 MOTs, Al tube for te top electrode, some pieces of wood and plastic but still missing copper wire, secondary support PVC tube, ... Smile
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Jeu 3 Nov - 7:00

well pvc is easy to get at a dopt hardware store.

the cheapest magnet wire i have ever seen was on ebay about 5lb for $190

8kv is rather low for powering the primary. ive seen it done with mots but they suck power.

as you should know they are not current limited and will suck up to 900 watts if they get the chance

if you hook them up primary in series too you might get way with it

i am going with a 14,200 volt way with NSTs but at only 60ma this is what might hurt me by not having enough amps Neutral but then agen its over 14kv on input Very Happy

mots are not meant to have 1kv powering them the magnet wire not rated for the voltage they come with (i blame china) so 8kv is going to really push it. i suggest keeping them in motor oil and that will help with its overheating problem too.

"(10-12 in DC)" ??? 10 to 12 inch in diameter or direct current??
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Jeu 3 Nov - 19:18

Yes, PVC isn't a problem Wink

Argh >< it's very very very very expensive... xD

Yes, the MOTs can sustain about 1 kW each so I've 4 kW Very Happy

Nop, primary in parallel and secondary in series Smile

But with a clever arrangement of secondaries 2 of the MOTs aren't overvoltaged and the 2 others are overvoltaged by only 2 kV. When I go home I upload a schematic Wink

Yes, I had the same idea :p I have to check the breakdown voltage of motor oil before but I think it's ok Very Happy

Sorry, I meant "(10-12 kV DC)", about Ueff * sqrt(2) Smile
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Jeu 3 Nov - 23:30

"Nop, primary in parallel and secondary in series"

mots are not current limited and there for in a arc accost the spark gap will not brake unless you do a rodery gap. you need to current limit them by wiring the primarys in series too this will choke down the current consumption while keeping the 8kv. or you will need an inductive ballast or your beakers will flip rite away.

why direct current ? DC are you making it musicale?

ac is much more efficient at creating magnetic fields to power a tesla coil if you have no reason for this then i suggest agents it
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Jeu 3 Nov - 23:44

Yes, I know for unlimited current (mouhaha Twisted Evil ) ahem... Smile ^^

They will be preceded by a variac to limit the current and a lot of security of course. In fact the HV PSU is a rack of my lab rack cabinet that you can see the WIP here: http://brigole.1fr1.net/t1985-armoire-de-labo-en-rack Wink

I thought to test with two types of power to see which works best Smile
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Jeu 3 Nov - 23:50

i will tell you that AC will work better just because you can tune it to be in residence too

variacs are expensive as hell too Neutral and i need to get one

once you get it set up you need to try neon sgin transformers and see if it is better or worse results alot lower amps but higher voltage
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Ven 4 Nov - 0:04

Ok Very Happy

Yes, but... I've an idea Very Happy

An electronic variac but without triac (replaced by a bridge rectifier and a MOSFET drived by PWM at high frequency) http://biduleohm.free.fr/fichiers/ascii.html#hacheur

The promised schematic of MOTs: http://i45.servimg.com/u/f45/13/95/52/26/teslam10.png (like the shematic isn't designed by me, the only interessant part is the MOTs cabling, the rest can differ without importance)

Yes but my alone NST died in mysterious circumstances... I'm thinking to re-use the flyback transformer (wich seems good) with a DIY driver Smile but it's only a 9 kV / 150W NST so...

NSTs are hard to find and expensive in France...
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Ven 4 Nov - 0:18

but at such a high Hz you will have trouble getting the TC to be tuned but that will make a solad state TC and making arcs coming off of it to be a solad stream of death! Twisted Evil

the fly back will not do

hm.. nsts are rather easy to get here. ah fuck it buy 1 or 2 on ebay eaven if they are American and wire it to the variac and cranke it up to only 120v or to make things interesting try using one of you crappy phone connectors you use in France! Twisted Evil ! and turn it on the over wind and see what kind of arcs you can get by dubbing the in voltage forcing you phone connector into slavery for betraying you and getting a near 3x voltage output Laughing

haha yes i know about your huge phone connectors and i think it is funny that they brake all the time Laughing
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Ven 4 Nov - 0:29

I think if I choose correctly the frequency it's ok Smile

^^ I know, it's a very old connector, now we use RJ11 connectors Wink
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Ven 4 Nov - 0:32

you should get a tun of American electronic and hook them all up to European outlets and see what they do.. i think it would make a vary interesting vid Twisted Evil

well its all trial and error with hv so you will need to try alot of different things
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Ven 4 Nov - 0:44

But our power socket is better than your's (<-- it's english this sentence?) because it can hold bigger currents Smile

Moreover the current is double in 110 V for the same power that in 230 V...

You're in 110 V or 230 V in USA ? it's seems to me you've changed from 110 V to 230 V but I'm not sure Smile

Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Ven 4 Nov - 1:00

no we are 110 to 120 v you can never tell without testing but its normally 120v

yes your normal sockets can handle alot more amps but are 2x as big for a standard appliance

i dont know if you have stores that sell them or if its just in the US we sell plugs that you can attach to more power sucking tools normally that can range from 20 amp to 60 or more amp plugs and sockets. what will let you replace or whatever you need to do if it needs more amps

just take some American appliances and cut off the plug and replace it with yours and plug it in its meant to be on 120v but you have 230 Twisted Evil
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Ven 4 Nov - 1:17

Ok Smile

In fact we have two different socket: http://www.ifnot.fr/wp-content/uploads/2010/09/prise-courant-150x150.jpg (for <= 10 A) and http://images03.olx.fr/ui/5/54/70/1272642951_22315470_1-Photos-de--FICHE-ELECTRIQUE-MALE-220Vca-16A-1272642951.jpg (for <= 20 A)

But we have 2 other sockets, a lot bigger but identical to the one on second pic fo very heavier currents (32 and 63A if I remind correctly) Smile

How to overclock everything... Laughing
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Ven 4 Nov - 2:14

can you plug them into each other?

are 3 phase plugs universal? all over the world or do you have different ones too?
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Sam 5 Nov - 0:28

For the 2 first, yes, but the 2 last are bigger Smile

Hum... not in houses, but in industry yes Smile (I'm very tired --> bad english, sorry)
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Dim 6 Nov - 8:58

really? i thought 3 phase would be different too. the outlet should conect to groung, hot, hot, nuteral and from hot to nuteral should be 110v but hot to hot should be 220v
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Dim 6 Nov - 15:09

This is 2 phases, 3 phases is ground, hot, hot, hot, neutral.

In France hot to neutral is 230 V (220 V in old standard) and hot to hot is 400 V (380 V in old standard) Wink
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Lun 7 Nov - 3:42

so yes 3 phases different by alot
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Lun 7 Nov - 13:22

Yes Wink
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Sam 12 Nov - 1:39

why do people only feed fly back transformers pulsed DC at high frequency and not AC?

and what is the maximum voltage you can feed them? Smile
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Sam 12 Nov - 18:09

Because it's simpler ("simpler" exists ?) Very Happy

Feed what flyback ?
Revenir en haut Aller en bas
Invité
Invité
avatar


MessageSujet: Re: Electronics    Sam 12 Nov - 20:10

a fly back transformer is the hv transformer in computer monitors Smile

i can not see why a high hz DC is easier than just an AC supply

do you know max voltage you can feed them?
Revenir en haut Aller en bas
Biduleohm
Pyromane confirmé
Pyromane confirmé
avatar

Messages : 2275
Age : 26

MessageSujet: Re: Electronics    Sam 12 Nov - 20:39

I know what is a flyback, I just ask for the model Smile

A tv flyback, ok Smile

In theory any voltage between 10 and 200V it's depend on the primary winding Wink

The original primary use 150 to 180V but for DIY we re-wound a primary for use it with 12 to 30V generally Very Happy

Th DC is easier because a 555 + a mosfet suffice. Moreover, with a push-pull design (just one more mosfet) you feed the FB with AC from DC psu Smile

AC isn't a good solution, the FB need a square signal à high frequency, not a sinus at 60 Hz...
Revenir en haut Aller en bas
Contenu sponsorisé




MessageSujet: Re: Electronics    

Revenir en haut Aller en bas
 
Electronics
Voir le sujet précédent Voir le sujet suivant Revenir en haut 
Page 1 sur 2Aller à la page : 1, 2  Suivant
 Sujets similaires
-
» Cutter electronics
» EAE Electronics
» Conseil technique
» Anti puces électronique
» Question sur LIP Electronic R 148

Permission de ce forum:Vous ne pouvez pas répondre aux sujets dans ce forum
Burnmaster :: Le bar Omètre :: English speaking forum-
Sauter vers: