555 voltage step up

You start with 5V (actually 3.5V) - each two diodes is one more 3.5V (in theorie, but unfortunately there are two times of diode threshold which you get less) so after 6 diodes you have 13.8V and after 7 you get a pulsing voltage between 13.8V upto 17V ! So normaly only an even number of diodes make sense. and if you get more then Vs+(Vs * diodes/2) you must ask yourself whats wrong and in this case the missing 15Ω resistor is missing for a 555 work around, which give you magical voltages which you dont get in reality! below 20V and not kilo volts! http://everycircuit.com/circuit/4509207444586496

its really funny, i commented this circuit already yesterday, but as i did that wrong and commented the copy of this post. so this circuit is uncommented since yesterday, are you guys outside all accept this kilo volt generator? Dont you guys dont see it must be wrong? Such a simple circuit gets no comment and all these experts outside, you are not allowed to critic its circuits cuz they know it better and do not need help, lol

and if you do not understand this 15.1Ohm 555 workaround current limiting output resistor then try this with a little load at cascade output http://everycircuit.com/circuit/6209994226925568

Thankyou I checked it out nice circuit! Lol

I now got a good deal on a xenon bulb so I would love to light it up I need coils as well to make it work

@hurz, sorry, I thought you were handling this quite well, my input would have been similar to yours anyway, something like; http://everycircuit.com/circuit/5881061069553664

Nice circuit as well BillyT. It seems like it does better if the circuit would have a transformer(ST:BT). After all those diodes and caps it should be higher. A transformer(ST:BT) tends to bring the voltage at a great level.

"After all those diodes and caps it should be higher." how high do you expect to be the voltage?

I expect every cap and diode to double the voltage (Applied voltage×Amount of diodes and caps ×2).

Caps and diodes only double the voltage each time. Only one transformer can multiply the voltage by 100.

they dont double each time. They just add each time a constant voltage, in your case they add around 5V or a little less 3.5V each stage.

but what i was like to hear is a voltage in value you like to reach!?

to be more precise, is this neon bulb a little indicator one 5mm or a bigger one for car lightning several 10ten of Watt?