New answers tagged high-voltage
3
votes
Accepted
Why too many MOVs used in surge protectors?
Typical application of MOV looks like this:
(image credit and more about the topic here)
The image that you have shared seems like eight copies of this circuit, supposed to be wired with eight ...
- 8,361
0
votes
What type of amplifier circuit do I need to drive a piezoelectric ultrasound transducer?
Since transducer data sheets don't give many details of equivalent motional reactances and motional resistance, exact circuit values are not possible.
Here's an idea for a very simple driver that uses ...
- 26.7k
0
votes
What type of amplifier circuit do I need to drive a piezoelectric ultrasound transducer?
You need to list specifications of what you are trying to accomplish.
What is the purpose of your device?
What is the duty cycle? Is it continuous or pulse?
What sort of fidelity do you need? Is ...
- 10.3k
7
votes
A redesign of a bulky 12 kV source
I have been working on a hi-pot tester that goes up to 4 kV at 200 µA.
The basic setup is like this:
simulate this circuit – Schematic created using CircuitLab
The flyback transformer raises ...
- 8,843
11
votes
Accepted
A redesign of a bulky 12 kV source
Currently I’m working with a client that had a circuit that transforms 240 AC (50 Hz) to around 2400 V. After that they use a Cockcroft Walton ladder to boost it up to 12 kV.
Sounds a lot like a ...
- 96.8k
3
votes
Accepted
Vacuum fluorescent display: What if you power the filament (cathode) with a high voltage and the segments (anodes) with a low voltage?
Former consumer DVD player designer here. I've designed custom VF display panels and systems to drive them.
To the question. VFDs are vacuum tubes. The most basic vacuum tube contains an anode and a ...
- 55k
0
votes
Insulation resistance or isolation resistance?
Insulation resistance is used when measuring resistance between two materials, one being a conductor and the other an insulator, these two materials must have physical contact!
Isolation resistance is ...
- 1
0
votes
Protection from high voltage in high frequency ignition in plasma cutting machines
Yes, this kind of filter circuit is definitely used in mass production equipment. Usually, it's appended with a common mode choke.
I'll leave a couple of photos. You can clearly see the input ...
1
vote
Vacuum fluorescent display: What if you power the filament (cathode) with a high voltage and the segments (anodes) with a low voltage?
To accompany what others have said:
Voltage across the filament needs to be low enough to not burn up the filament. In old vacuum tubes I believe 6.3V was common, in VFD tubes, it can be much lower (...
- 161
1
vote
Accepted
How can a Class E Power Amplifier be built and experimented with safely?
OP's circuit does generate voltage spikes at MOSfet drain that can considerably exceed the DC supply voltage. Switching current off quickly to an inductor is the cause.
The circuit fragment of the few-...
- 26.7k
2
votes
How can a Class E Power Amplifier be built and experimented with safely?
basically be very carefull Follow the same advice given to those working with vacuum tubes. rubber shoes and one hand behind your back.
- 34.6k
2
votes
Switching 5 kV for a neon sign
As an idea for individual 12V->HV supplies, here's a high-volume, novelty quality power supply for a neon tube in the 30cm range.
It was the silhouette of a skating hockey player, in a couple of ...
- 407k
Top 50 recent answers are included