Questions related to the design of circuits that supply or use a high voltage. There are a few definitions but the IEC definition of a high-voltage supply system is above 1000 Vrms AC or 1500 V DC.

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2answers
41 views

How to measure high-voltage and high-frequency ripple?

I have a ferrite transformer outputting 1.2kV RMS on it's secondary. I have added a diode to do half-wave rectification, and have added a sufficient capacitor (10nF) in parallel to deal with ripple. ...
-3
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2answers
74 views

ATMega on high voltage application [on hold]

Yesterday I had an argue with an electrical engineer. I am a beginner software engineer. He say that a logical circuit( processors, microcontrollers) should never be trusted in risky applications. ...
-5
votes
0answers
60 views

Convert current to high voltage [on hold]

Is there any type of circuit to convert something like 160 A to high voltage I need to have a high voltage from 160 A and 4 kv input
0
votes
1answer
90 views

Should I open the CRT monitor?

I have a CRT monitor which I was looking to open to acquire CRT for a project I am working on. I know its probably not the best idea but I have taken some safety measures. They are as follows: 1) ...
3
votes
2answers
128 views

Measure high voltages with a multimeter

My multimeter is rated to 600V. How can I readily (and safely) use it to measure higher voltages?
4
votes
5answers
155 views

Can a Tesla coil's secondary wiring overlap?

I am building a small tesla coil just as a proof-of-concept using a bug-zapper circuit. I unwound some enamel copper wire off a transformer and put it on my 12 cm length x 2 cm diameter PVC pipe and ...
1
vote
2answers
33 views

understanding electrical motor and force

I am looking to drive an electrical motor to power a cart with some substantial weight. I want to power this with as simple a method as possible but want to maximise the force for it. I have several ...
3
votes
2answers
138 views

How to control over-voltage at high voltage?

Suppose we're using a voltage multiplier to charge a high-voltage capacitor (C Big in the diagram). If you significantly exceed the capacitor's voltage you'll ...
0
votes
1answer
16 views

How to use an ASY2400 Xenon Flash Unit

Background: I just picked up an ASY2400 Xenon Flasher unit from a local electronics store. I found this hookup diagram for it: I connected a potential difference of 12V to the board. +12V to pin J4 ...
0
votes
1answer
80 views

Constant Current, 1.5 amp, high voltage into variable load [closed]

I need to design a constant current 1.5 A circuit. Input: A 3.3 v, 3 mA, 1.5 millisec pulse. Load: Detonators, with total resistance starting at 80 ohms and increases to 160 ohms in 1.5 ms. ...
0
votes
2answers
59 views

High voltage DC current measurement by inductance?

I'd like to incorporate a few permanent ammeters in a 600V DC circuit. I've found all sorts of nifty panel ammeters, both analog and digital, but most are rated to less than a tenth that voltage. I ...
-2
votes
1answer
45 views

High Voltage Supply Use

I have some quires regarding High Voltage supply uses: Is there any power supply which can operate in the range of 90VAC-600VAC? If i have my high voltage supply in the range 300VAC-600VAC and i ...
-1
votes
2answers
37 views

Can I use this Emergency Stop Switch Push Button Mushroom Push Button 4Screw Terminal_K2 for switching on and off a 4500W 220V heating element? [closed]

Here is the link to the emergency stop switch - http://www.ebay.com/itm/NC-N-C-Emergency-Stop-Switch-Push-Button-Mushroom-Push-Button-4Screw-Terminal-K2-/272048010923?hash=item3f575336ab. Thanks.
0
votes
1answer
41 views

Boost a HV power supply from +1250 V to +1500 V

I'm designing a base for a photomultiplier tube using a recycled HV power supply. The power supply is an EMCO C12. The base has a 14 pin socket (to connect to the PMT), the EMCO C12, a DAC to program ...
1
vote
1answer
34 views

Negative voltage from positive output DC/DC

my DC/DC ( http://www.ti.com/tool/PMP10077 ) has 200 V output on pins +HV and GND. Can I get negative output by simply swithcing the meaning of output pins -> I will use +HV as GND, and GND as +HV. I ...
0
votes
1answer
40 views

Switch TENS unit between many channels

I would like to switch the output of a tens unit (one of those things that uses electricity for pain relief) to 8+ different outputs. I want to create an electro tactile device. The idea is to switch ...
-1
votes
1answer
41 views

How to reduce VOC of solar panels to match the MPPT of inverter

I will have an off grid solar panel system to run my deep well 5,5 Hp water pump. I already got 24 of 250Wp 36,3 Voc panels and 3 phase Delta VFD C2000 inverter/driver. for this system I need to wire ...
0
votes
1answer
39 views

Mechanical Contactor for High Voltage DC - Substitute with Semiconductor

To switch 1kV DC at 5A, I usually use a mechanical contactor (<- Wikipedia) that switches both highside and lowside of a resistive load. Any suggestions on a semiconductor (or non-mechanical part) ...
0
votes
1answer
94 views

Follower current source?

I need advice on a problem I'm having I need a follower to transmit an AC signal into a low impedance load which is the cathode of a triode but I also need it to be an adjustable current source to ...
3
votes
3answers
323 views

Op amp with transistor in feedback

I am currently looking for a high side current sense IC. I have noticed that most of them that are without galvanic separation, are using an op amp with bjt transistor like in bellow schematics: ...
1
vote
2answers
35 views

Power Transformer with two Buchholz relays

In my workplace we have a power transformer, on its conservator tank there is a device like a Buchholz relay and its named as Atmo-Seal. What is the purpose of this device?
0
votes
0answers
34 views

High voltage reading isssue

Here i am attaching old and new schematic for reference.While designing the old board i have made mistake keeping HV- (j14) as common ground reference . J14 and j12 are connected with high voltage ...
1
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2answers
74 views

Earth resistivity meter design

I would like to design an earth resistivity meter for use in archaeological surveying. This is essentially a current source placed in the ground and a ohmmeter to measure the resistance between the ...
0
votes
0answers
54 views

Protoboards for high voltage

What are standard practices for organized prototyping at high voltages? A typical 0.1" pitch protoboard might be good for a few hundred volts. But as voltage increases I assume those boards are ...
0
votes
2answers
75 views

Need approval of transformer driver design

I designed a circuit from several ideas I saw before and I'm a bit too impatient to build the thing myself. (http://imgur.com/KD97NuJ) Basically, it's a two-transistor oscillator combined with an ...
0
votes
1answer
81 views

“Dead-man” safety switch for HV bench work?

Long-haul freight trains and other systems that required an alert operator for safety would often implement a "dead-man" switch that would shut the system down if the operator couldn't actuate the ...
1
vote
3answers
129 views

Transformerless BUCK SMPS for 1kV->12V

I have a challenge to push 500 Watts (15V) at 100 meters of telco telephone cable (0.088mm2, 28 AWG, 200Ohm/km, 500MOhm insulation). The only way to achieve this is by boosting the voltage up to ...
1
vote
3answers
201 views

Why does the cathode heat up more than the anode in an electric arc?

I have recently built a flyback transformer driver with a 555 timer, and have been drawing electric arcs. But I noticed that the cathode electrode(the HV pin on the transformer) heats up a lot more ...
2
votes
2answers
103 views

Jfet as HV resistor

I want a voltage controlled resistor for high voltages for a project I'm working on and using a common emitter/source transistor to shunt current into ground in order to get a desired voltage is not ...
2
votes
1answer
73 views

Differential measurements with high voltage oscilloscope probes

This interesting post about differential measurements with a scope has raised a few questions in my mind. I have read about true differential scope probes and they seem to be very expensive. Would ...
-2
votes
1answer
49 views

Drawing current [duplicate]

I read some where that an electronic device will only draw the required current for its operation but i dout a device working at 5 volt 500 mah will burn at 5 volt 3 amp source is this true or will it ...
1
vote
2answers
143 views

High voltage voltage controlled linear variable resistor

I have some high voltage (300v+) analog circuits that I want to control digitally which requires the use of a voltage controlled linear resistor that can withstand the high voltages. I don't expect ...
2
votes
0answers
106 views

High voltage DC offset servo

I'm working on a project and I need some assistance. I have an audio tube amplifier output stage that I need to have adjustable operating points while maintaining a DC null at the output. [![enter ...
2
votes
1answer
137 views

High voltage power supply and shunt regulator design

I'm building a high voltage power supply for a tube amplifier preamp and I need some advice. I need a power supply with a shunt regulator that is rock solid stable and dead quiet and outputs 600v ...
1
vote
2answers
52 views

LiPo/Li-Ion Cells in series max end-to-end voltage

I have wondered how many cells can be connected in series before issues may arise. I also wonder what specifications on the tech data sheet would allow you to decide which batteries are best for high ...
0
votes
2answers
50 views

DC High Voltage Line Splitting Problem (Electrode “Tuning” Application)

I am having trouble coming up with a solution to a problem engineering a DC circuit that can take a single line input (Vin) and split into two outputs (Vout1 & Vout2). The goal of the circuit is ...
-4
votes
2answers
56 views

How do I open a grill ignitor? [closed]

My grill rusted apart, so I decided to salvage the spark circuit. But there's a problem - I can't find the polarity of the ports, and I can't open up the blackbox. http://i.imgur.com/BXqiQjP.jpg How ...
-1
votes
2answers
84 views

Calculate primary winding current in transformer under load[Exercise]

I have been trying to get to the answer to this exercise shown in the Solutions' reference page but despite countless attempts couldn't get to it. it reads as follows: ...
0
votes
2answers
36 views

How to multiply voltage of a pulsating positive only source?

Total newbie here. I'm trying to multiply the voltage of a positive only pulsating source. It variates from 0v to 500v. All voltage multipliers I found explain how they work with a AC source, ...
10
votes
3answers
733 views

What voltage do electrical fly killers use?

I am interested in the voltage used in electrical fly killers - does anyone know (no speculation please) the voltages generally employed? To be clear, I am talking about mains powered, wall-mounted ...
0
votes
3answers
78 views

How would I design a cable line that doesn't leak heat to the ground surface?

A loaded underground power cable dissipates some power as heat which heats the surroundings. The following scenario is possible in regions where large amounts of snow accumulate on the ground during ...
1
vote
2answers
44 views

LT3750 Capacitor Charger DONE pin

I'm drawing out a circuit using Linear's LT3750. I don't quite understand the DONE pin. What I want to do is add an LED and have it come on when charging is done. Like in a camera. Can someone suggest ...
-1
votes
2answers
62 views

High voltage switching transistor [closed]

Is there any transistor that can be used to switch voltages up to 3000 volts? What transistor could it be?
0
votes
3answers
182 views

Capacitors -> Storing 500 Joules in a capacitor with a simple 9 volt battery

I am a newbie to not only this forum, but electrical hobby(ing) also. I need 500 Joules within a few milliseconds from a capacitance. I plan to make this capacitance at "home". I plan on using a ...
0
votes
1answer
69 views

Why a high voltage AC always present in SMPS AC to DC power adapters

I'hv seen every 2 pin SMPS AC to DC adapters shows a little high voltage respective to the ground on the out put, on both + and GND wires(or more if more wires present). This voltage is high enough ...
0
votes
3answers
130 views

generate high voltage using LM555 with a transformer

I'm a French student (please forgive my bad English spelling) who works on a system of portable echograph (you can find the information of the project on the wiki of echopen). Could you help me ...
1
vote
1answer
67 views

Unbalance current in capacitor bank

I'm working with a 11 kV capacitor bank and is trying to calculate (by hand) the I0 current (down right on attached image). The circuit is three phase, 11 kV ph-ph. The I0-amperemeter is the only ...
0
votes
2answers
227 views

How do I test a USB drive to be sure it is not a “USB killer”

I have recently read of a dangerous USB drive containing a circuit instead of storage, that destroys the hardware of a computer by injecting a high voltage, high current pulse into the port it is ...
1
vote
1answer
157 views

How can I be sure I blew up my WS2812B strip?

I have a WS2812B strip which, I guess, I ruined it. I connected a 12V adaptor (by mistake) to the strip. I have a multimeter and when I check the +5v/GND end terminals of the strip, the meter lights ...
0
votes
1answer
201 views

Where can I find a transformer that will step up a 12v input to around 400v?

So i'm trying to build an ultrasonic levitator by following the build on mike's electric stuff's channel h ttps://youtu.be/qy1w6rTpC2g . I've set everything up same as he did, following the schematic. ...