### Author Topic: mikrocontroller code?  (Read 9022 times)

0 Members and 2 Guests are viewing this topic.

#### Login to see usernames

• Sr. member
• Posts: 457
##### Re: mikrocontroller code?
« Reply #8 on: April 04, 2009, 11:16:40 am »
no current trough coil and all current through cap (but amps are choked), try to look for these properties.
that is not how current works. in series, the current is the same everywhere. the inductance (and so the resistance) of the coil has to be higher for a maximum of voltage raise at the cap.

Q = 1/R * (L/C)^0.5
Vresonance = (2*pi*(LC)^0.5)^-1

the smaller the capacitor the higher the voltage raise will be.
« Last Edit: April 11, 2009, 13:00:03 pm by haithar »

#### Login to see usernames

• Sr. member
• Posts: 387
##### Re: mikrocontroller code?
« Reply #9 on: April 04, 2009, 17:54:14 pm »
yes correct, kirchoff current law, but current lags over voltage, don't know anymore how this lag correlate to L and C.

#### Login to see usernames

• Sr. member
• Posts: 457
##### Re: mikrocontroller code?
« Reply #10 on: April 04, 2009, 19:13:14 pm »
at a coil the voltage is pi/2 before the current, in a capacitor it's the current which is pi/2 before the voltage.

#### Login to see usernames

• Sr. member
• Posts: 457
##### Re: mikrocontroller code?
« Reply #11 on: April 05, 2009, 23:54:19 pm »
what happens when T1 is longer than the timeconstant? does voltage drop or does it keep its established voltage? I think latter is true.
voltage drops. the induced voltage in the coil is in opposite direction the current pulse is coming from. after tau (voltage waveform like a sin interval [0;pi/2]) is reached it's going back to zero, because it's acting like a normal ohmic resistance.

not exactly sure but it does not really make sense that the voltage is even higher, because of the opposite direction of the induced voltage.
while T2 (low), voltage collapses, when it reaches '0v' (after length of timeconstant) the magnetic field collapses and creates a second pulse (also with the same tc).
is this comparable to the next 90 degree of a sine? or again to the first 90 degree?
It's like the third 90 degrees.

in the image notice how the voltage is instantly at a maximum (x=6), that's the voltage pulse.
(http://upload.wikimedia.org/wikipedia/de/1/1a/Auf-_und_Entladung_Spule.png)

#### Login to see usernames

• 50+
• Posts: 68
##### Re: mikrocontroller code?
« Reply #12 on: April 06, 2009, 01:21:03 am »
Great job Haithar , I see this was done without a diode , plz see the effect with a diode , investigate further , dont give up on SM .

#### Login to see usernames

• Sr. member
• Posts: 457
##### Re: mikrocontroller code?
« Reply #13 on: April 07, 2009, 12:45:34 pm »
Great job Haithar , I see this was done without a diode , plz see the effect with a diode , investigate further , dont give up on SM .
this was only a picture taken from wikipedia, not what i really have. i don't own a digital oscilloscope or a digital system to record everything, only an analog one.
the waveform should be more or less the same of course, they used a diode to filter the back emf.

The voltage as seen by the choke would resemble the red current exponential curve.
How is the current from the collapsing field inhibited? By the second choke? Is it inhibited at all?
No, this was direct current, there were always Uo (5V) over the coil. The current is inhibited by the voltage caused by Lenz law, only for a short amount of time when using direct current like on the picture, but if you are sending in pulses of voltage there is a sharp voltage spike created everytime.
i guess the second choke helps to inhibit the current, but i still don't get why meyer connected them opposing each other.

edited:

now after you mentioned hyiq, he has quite an interesting setup. 23.2Watts for this amount of hydrogen could be more than you'd normally get.
Is this a coil after the transformer? The black thing in the middle which is connected with 4 cables, 2 from the transformer, 2 to the cells.
(http://www.hyiq.org/Library/Images/HHO%20Cell3.jpg)
« Last Edit: April 07, 2009, 13:26:00 pm by haithar »

#### Login to see usernames

• Sr. member
• Posts: 387
##### Re: mikrocontroller code?
« Reply #14 on: April 07, 2009, 13:34:36 pm »
!Correction:
The voltage as seen by the choke WFC, doh

Yes, only at U0 there is 5v over the choke but ends up with 0v potential difference (5v on both sides), even with a dc pulse.

hyiq: It pulses 12v into a 220:14 transformer, amplifying and rectifying the voltage, no chokes in there.
« Last Edit: April 07, 2009, 13:52:46 pm by Alan »

#### Login to see usernames

• Sr. member
• Posts: 457
##### Re: mikrocontroller code?
« Reply #15 on: April 07, 2009, 15:17:29 pm »

Yes, only at U0 there is 5v over the choke but ends up with 0v potential difference (5v on both sides), even with a dc pulse.

no, chokes do have ohmic resistance too. there is always 5v potential difference with dc.