The original concept of air ionisers is attributed to a Russian scientist called Alexander Chizhevsky.
I thought I'd honour him with a build of an ioniser with a needle array styled on the Chizhevsky Chandeliers, which were large ornate metal frames with lots of ionising spikes on them, that were hung from the ceilings of large public buildings in Russia.
The needle array I ended up building for this unit is based on a disk of PCB material drilled with holes and fitted with a circle of needles. I'd hoped to bend the needles out at 45 degrees, but they turned out to be very brittle.
In reality, while the electrostatic precipitation of dust was a useful if somewhat messy effect, the ambient generation of trace levels of ozone and other short-lived active molecules prevalent in natural outdoor air was probably the real reason the ionisers gave a renewed freshness to the stale indoor air.
Here's a link to Alexander's Wikipedia page:-
en.wikipedia.org/wiki/Alexand...
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You can download the Minion PCB manufacturing files at this link, ready for submitting as a single file to a PCB manufacturer:- www.bigclive.com/freebies.htm
Here's the openscad script for the 3D printed diode former:-
//BCDC Diode lead former for ioniser/ionizer
difference(){
union(){
//main block
translate([0,0,0])
cube([30,19,4]);
}
//lead recess
translate([-1,9,3.5])
cube([30,1,1]);
//diode recess
translate([22,8,2.51])
cube([9,3,3]);
//lead guide
translate([29,9,-1])
cube([1.1,1,6]);
}
16 май 2021
