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.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Hi, below are some pictures of my SG3525 driver that I use to drive a flyback transformer in a half-bridge fashion.
I am just wondering if all of the jumper wires are a bad thing and if my layout would be considered very bad in terms of stability. When I measure the frequency of the output it can fluctuate by about 100-200hz without me touching the circuit. Now this might be the potentiometer I am using (10k) as it is still new and very sensitive to the knob being touched (lol that sounds wrong!).
I know layout can be very important when you get into the mhz range but this circuit only goes from 16khz upto 86khz, not sure if poor layout can effect circuit oscillating in that frequency range.
I have no plans for this layout as I just made it as I went along following this diagram.
Except I have a 0.1uF decoupling cap across the supply rails and I am using a separate supply for the chip so the voltage regulator is not used.
I have one or two jumper wires going under capacitors, is that a bad thing?
Just wanting to get some options from people on here.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Tom Williamson wrote ...
i would personaly say that i think you can do better, to me it looks like you could cause alot of shot Circuits
Thanks.
I was thinking that, but I do have a piece of polystyrene then goes underneath it so if anything conductive gets under it only touches the polystyrene.
BTW another question, are ceramic caps any better than the film caps I currently have? When I did try ceramic caps the frequency was even more unstable.
Registered Member #3888
Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
if it works, it works. looks like you've got a lot of flux left on the bottom that I'd clean off with some isopropyl alcohol. I'm sure you'll make progressively nicer looking circuit layouts just as i continue doing. 0.1" grid space graph paper is pretty helpful in planning things out. I also found that dividing the circuit up into sections, efficiently laying each one out, and then puzzle piecing them back together based on their inputs and outputs can be an easy way of simplifying a design (like a divide and conquer algorithm)
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.
Would you consider this a bad circuit layout?
