Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 45
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
All today's birthdays', congrats!
Boost (40)
kerver (49)


Next birthdays
02/24 Dédé! (11)
02/24 Chris Maness (10)
02/26 Conundrum (46)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: Tesla Coils
« Previous topic | Next topic »   

PLL DRIVER CIRCUIT QUESTIONS *EDIT*

first  2 3 4 5
Move Thread LAN_403
twist2b
Tue Nov 26 2013, 08:32PM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
Holy... ok.... so you finally got it right for the H-bridge... but you have filter capacitors in series for a dc voltage? For serious? HAHAHAHA, SAAAME principle as for the H-bridge, you want ONE .1uF cap in parallel CLOSE to the chip... what you are doing is effectively producing a open circuit to the chips (no voltage).

EDIT - I'll say it again, essentially you just want to make sure that get a continuous 12V to the chip, so if you put a cap in parrallel close to the chip if there are any tiny voltage spikes for various reasons, that cap (RESISTANCE TO the CHANGE in VOLTAGE) will be like, "no sir" and filter that added voltage from 12V back to the source.... does that make sense?

EDIT2 - also you don't need any more than say 30V caps for the chips... you are on the control side and at most 20V MAYBE will go through them...

EDIT3 - why negative 5 volts and not ground to a chip that has ground pins? Your schematic was increasingly improving and than I feel like you went to another universe where the laws of physics just changed dramatically. LOL, I'm sorry, I don't mean to come across as mad I'm just confused what happened!!! Stick with 12V to the rails of all the pins.
Back to top
StormInABottle
Wed Nov 27 2013, 05:12AM
StormInABottle Registered Member #9252 Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
X_X...
I will get to modifying the schematic later. And I did not connect it to ground cause I have only one ground. The tesla coil will be connected to that. So I figured negative 12 volts would replace ground with out problems.
And I know I would need 20V at most. But I just like to make sure there is space if anything goes wrong
But tell me. Are the values or R1 R2 and C1 correct?
Back to top
twist2b
Thu Nov 28 2013, 12:27AM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
Bleeder resistors seem fine to me. if you run into trouble (hopefully you have an oscilloscope) if you see abnormalities from the output of the mosfet drivers (you can check there) than increase the resistance values a tad... I can't find which one is C1? are you talking about C7?

Edit - so your secondary coil with so much output should NOT be connected to DC ground but fed DIRECTLY back to a mains ground... as that is fed to mother earth. Everything on the primary side or "control side" can go to DC ground.
Back to top
StormInABottle
Thu Nov 28 2013, 04:25AM
StormInABottle Registered Member #9252 Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
C1 is the 50pf one on the control side
No I do not plan on adding bleeder resistors.
Psst.. No oscilloscope
Back to top
twist2b
Thu Nov 28 2013, 06:27PM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
I read the PDF on the chip, seems that capacitor is just to help with filtering and such... it says:

C1 should be greater than 100pF if the voltage powering the chip is greater than or equal to 5V
BUUUT
C1 should just be greater than or equal to 50pF if the voltage is greater than or equal to 10V so you are fine but why not just switch that bad boy out with a 100pF eh? That way if someone decides to power their system with 5V it's not going to be an issue.

Also, if you dial down the pot all the way and you get a signal it would probably be best to eventually just replace it with a standard resistor for your final schematic because I am guessing the more resistance you put on the dial you could actually lock into a higher frequency from the coil which will yield crappier results... think of the secondary like a tuning fork... it rings very well, but if it's in the "key of C" like music, you can hit that c note again at a higher frequency but the amplitude will change. Does that make sense?
Back to top
first  2 3 4 5

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.