I have a cheap and cheerful UV fly killer which is probably a couple of years old. I noticed the other day that the high voltage side of things is no longer working so I dismantled it. Inside, apart from the fluorescent ballast which is still working fine there's just a single transformer. Needless to say there's no fuses on the primary or secondary side and it's potted so it's not fixable.
I was thinking about just making a very simple multiplier out of loose components, I wasn't even going to etch a PBC, just twist and solder the leads and stick the whole thing inside some heat shrink when it's finished, maybe fill with resin if necessary. I'm not after winning any awards with this I just want something quick and easy that will work.
I know how to wire a mulitiplier with just caps and diodes but I have a couple of questions for the electronics guys.
1. If I'm using 230v AC input, how many stages would I need for a fly killer? I'm guessing the Tx was a few KV because it used to put quite a nice arc across the flys that got in there, I think it was a dragonfly however that caused its demise.
2. Would there be a need for primary and secondary side protection ie fuses or a limiting resistor perhaps?
3. Anyone any idea of actual component spec for the caps and diodes?
I'd obviously be much happier if this thing was non-lethal to people and not a fire hazard so any advice greatly appreciated.
This was the basic multiplier I was thinking of;
I was thinking about just making a very simple multiplier out of loose components, I wasn't even going to etch a PBC, just twist and solder the leads and stick the whole thing inside some heat shrink when it's finished, maybe fill with resin if necessary. I'm not after winning any awards with this I just want something quick and easy that will work.
I know how to wire a mulitiplier with just caps and diodes but I have a couple of questions for the electronics guys.
1. If I'm using 230v AC input, how many stages would I need for a fly killer? I'm guessing the Tx was a few KV because it used to put quite a nice arc across the flys that got in there, I think it was a dragonfly however that caused its demise.
2. Would there be a need for primary and secondary side protection ie fuses or a limiting resistor perhaps?
3. Anyone any idea of actual component spec for the caps and diodes?
I'd obviously be much happier if this thing was non-lethal to people and not a fire hazard so any advice greatly appreciated.
This was the basic multiplier I was thinking of;