>--- Codesuidae <codesuidae@...> wrote:
>
>roger lucas wrote:
>> For those interested, the vibrating electrode is
>> driven by the solenoid arrangement in an aquarium
>> aeration pump. Simple, cheap and very effective.
>> However, production item may have to be a lighter
>> design to increase the oscillation frequency.
>Isn't the frequency of an aquarium pump determined by
>the power line
>frequency? In the designs I've seen its just a coil
>driven from the
>power line pushing a magnet connected to a lever that
>moves a diaphragm
>attached to a cavity with holes covered by small
>rubber flap valves.
>
>Dave K
Yes it is, if you connect it to the mains. However
there is nothing to stop you driving it with a
variable frequency oscillator and a high voltage audio
power module, or just a mosfet and dc. Change the
magnet to a rare earth specimen and it fairly takes
off.
The rubber diaphragm has good damping. Result =
Variable Frequency electrode for less than £10.
Connect the the EDM PIC control and you can sync the
spark discharge to the 3 axis movement.
Roger
Be sure to visit the group home and check for new
Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsIf Files or Photos are running short of space, post
them here:
http://groups.yahoo.com/group/Homebrew_PCBs_Archives/ SPONSORED LINKS
Electrical engineering degree online
Electrical engineering degree
Printed circuit board
Electrical engineering
Electrical engineering course
Electrical engineering graduate school
---------------------------------
YAHOO! GROUPS LINKS
Visit your group "Homebrew_PCBs" on the web.
To unsubscribe from this group, send an email to:
Homebrew_PCBs-unsubscribe@yahoogroups.com Your use of Yahoo! Groups is subject to the Yahoo!
Terms of Service.
---------------------------------
___________________________________________________________
To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre.
http://uk.security.yahoo.com