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Category Archives: High Voltage
Fulgurite
This fulgurite is the result of lightning striking sand. It leaves a cast of fused sand with a central empty channel.
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CD flash bang
This is an intense flash and bang produced by a CD and a little application of high voltage.
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Flyback supply 300 W
This is a Royer oscillator which is a relatively high power self resonant circuit useful for generating high voltages from flyback or other ferrite transformers. Output is probably around 2000 VAC. The arc stretches out to about an inch at a power of up to 300 W.
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Beginners Sparks
Here is a fast, cheap and generally safe project for beginners sparks with a minimum component count. It uses an ignition coil from a car.
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Voltage multiplier 80 kV
This voltage multiplier 80 kV has a 5 inch corona with intermittent sparks in this 3 second exposure.
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Ignition Coils
Car ignition coils make great spark sources. After all they were designed to power a spark plug. Now, put two of them out of phase and the sparks are doubled in size. Here are some examples.
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Voltmeter for HV
I needed a voltmeter for HV to be able to be seen from a distance at night. Here is my digital voltmeter with HV probe reading 13.06 kV. “Continue reading” for more details and photos. Continue reading
High Voltage Projects To Do
A nice 60 kV transformer and heavy dual variac for the kids to play with is on my list of high voltage projects to do. Here are some more of them.
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TV flyback HV supply 60 W
This is based on a TV flyback coil and a single 2N3055 power transistor and other on-hand components giving a 1/2 inch spark at 20 V 3 A input.
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