Hi all. I don't know anything about this effect, if there's a proper name for it, or why it happens other than I basically stumbled into it the other day when I was trying to track down apparent phantom voltages between thin air, me touching bits of metal (including a lit CFL which the voltmeter liked a lot), and the earth. It turned out to be an effect of the power supply I'm using to run my SSG, which was connected to earth on the input negative. The 12V DC switched mode power supply will not light a neon bulb between the negative and positive coming out of it (obviously!), but it will light the neon between either the positive OR negative and the earth, including me holding the other terminal of the neon. After some playing about I managed to get 190 volts on the meter, which will spark upon closing the circuit consisting of wires or metal, but it will also flow through me and light the neon without me feeling anything.
It will also charge a capacitor to 190V within seconds (don't try to be a part of the circuit beyond this point!), and light a neon nicely to a bright purple in one short pulse, but this capacitor I have been experimenting with manually discharging through a step down transformer, through a rectifier, into a lower voltage larger capacity capacitor, and dumping that charge into a rechargeable AA battery. Although the battery has seen better days to say the least seeing as there's green stuff leaking out of the top and it's over 20 years old so it's not holding the charge, but the process appears to work. And as far as I can make out, this whole thing is free to run on top of the fact I'm using the power supply to power something else.
So input and knowledge is welcome if anyone can explain it or has come up with something interesting Attached is the simplified circuit that seems to "reliably" "capture" the maximum of 190V I can get out of it. Having a voltmeter connected does affect it, as you will notice the capacitor's voltage dropping when you connect the meter. Also, connecting two power supplies in parallel on the "input" raises the voltage to 235V and charges the capacitor faster.
onewire.jpg
It will also charge a capacitor to 190V within seconds (don't try to be a part of the circuit beyond this point!), and light a neon nicely to a bright purple in one short pulse, but this capacitor I have been experimenting with manually discharging through a step down transformer, through a rectifier, into a lower voltage larger capacity capacitor, and dumping that charge into a rechargeable AA battery. Although the battery has seen better days to say the least seeing as there's green stuff leaking out of the top and it's over 20 years old so it's not holding the charge, but the process appears to work. And as far as I can make out, this whole thing is free to run on top of the fact I'm using the power supply to power something else.
So input and knowledge is welcome if anyone can explain it or has come up with something interesting Attached is the simplified circuit that seems to "reliably" "capture" the maximum of 190V I can get out of it. Having a voltmeter connected does affect it, as you will notice the capacitor's voltage dropping when you connect the meter. Also, connecting two power supplies in parallel on the "input" raises the voltage to 235V and charges the capacitor faster.
onewire.jpg
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