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Questions tagged [high-current]

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Say how much current is required, high-current means different things to different people.

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I want to measure car battery currents in high resolution and in wide range and both directions (including engine start and charging currents). I don't need very high precision measurement, but I ...
Kamil's user avatar
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I want to know if it is reasonable to use a shift register to control electromagnets. We want to drive electromagnets with about 400-500mA. The TPIC6B595 data sheet claims "Each output provides a 500-...
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I want to drive 3 LEDs in Series at constant current of approx 900mA - 1000mA. Will this circuit work? The LEDs are Vf 3.55V @ 1000mA. LED Diagram R1 = 0.25W 100k Ohm Resistor R2 = 2W 0.47 Ohm ...
fizzy drink's user avatar
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I have a hybrid EV that I'm working on which uses 2 48V DC motors with a maximum load of 300 Amps each, for a total maximum load of 600A. I have 2 alternators running off a gas engine generating 125 ...
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I need to join 4 wires together: a 6 gauge wire, two 10 gauge wires and a 22 gauge wire. The 6 gauge wire is the current source, the two 10 gauge wires will draw a continuous current of up to 30A and ...
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To implement desaturation protection on a switching transistor, one typically sets some manner of comparator to watch the voltage across the current flow terminals of the device. If that voltage ...
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I'd like to power the GPRS modem (uBlox LEON G100) with a 4V 500mA power supply. How can I calculate the capacitor parameters so that they will provide the necessary current for TX slots? The ...
eltomek's user avatar
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I need to control a very high current in my project. I'm planning to use darlington formation with three transistors. I'm planning to use BQ24450 to charge a group of 12V acid-lead battery. BQ24450 ...
hkBattousai's user avatar
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I came across these diodes on ebay today and was very surprised! So surprised that I probably have read something wrong. So I'm asking you guys just to make sure. Can these little guys literally ...
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Is it possible to supply power to a very high load within a huge time range? This question particularly regards MOSFETs. I know that a MOSFET must switch fast so that a little power would develop ...
Dor's user avatar
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I'm in the process of designing an ARM single-board computer that would also have high current (18A) running through the same board. Think of a BeagleBoard, but powered by a 6V/2800mAh battery. So the ...
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What are some mechanisms that one material can be coupled electromagnetically to another, other than basic tranformer action? The model I'm considering is a high current electrode, about 1.5m wide, ...
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I designed a circuit (MOSFET HBRIDGE) that Should Be able to handle 70A @ 14V. Now that the board is sent out I am on to thinking about how to properly test it. Right now the most logical way I have ...
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I have the same problem as the guy in this question, but in this case the input voltage varies from 20 volts to 28 volts. I would like a current of 20A to flow through the mosfet without it getting ...
Zipporobotics's user avatar
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I have a solar panel which provides the output of up to 500mA with 6v potential difference. .5A is the maximum current output, and the usual output will be around 300-350mA. Can I use it as a power ...
Mr Programmer's user avatar
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According to The Circuit Calculator my 18 amp traces on 4 oz copper need to be about 160 mils. Only problem is I don't have room for this. I've seen boards use raised bus bar and also solder bus ...
alxcpa01101's user avatar
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I'm planning a custom power-distribution / fuse-board for in-car application, but that requires carrying high currents (50A+ @12v*) on a PCB trace. Since I'd like to keep the board cost, and physical ...
John U's user avatar
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An EL wire consume ~10mA/m, and need a 1800Hz, close to main voltage, sinusoid supply. (The noise is not a matter as the EL wire itself will cut off the frequency >2kHz). for an installation I would ...
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I am planning to use a DC drived SPST reed relay. Below I include the spec for voltage, current and power ratings. Contact Rating: 200W Carry Current: 5A Switching Current: 3A Switching Voltage: ...
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I have this circuit built (updated to remove short-circuit): I'm experiencing some weird behavior though that I don't understand. 1. When I close the switch, nothing happens. No current flows ...
Mason's user avatar
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I have a transistor which will be triggered by an arduino digital pin. When the transistor switch is closed, ~5 A is going to flow from the collector to the emitter. However, I was under the ...
Mason's user avatar
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If I have a few pins of a relay (which is rated for the correct current) that will carry 5A when the relay is triggered, what's the best way to wire this up? Details: I have a breadboard with a ...
Mason's user avatar
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Despite my Computer Systems Engineering degree, I haven't played with electronics for over a decade, and I'd like to get back into it. I have a project idea, and I think I've got all the design leg ...
Thorben J's user avatar
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I've read that solderless breadboards cannot handle more than 1 A of current or so. What kinds of alternatives exist to a solderless breadboard? Would a soldered board make a difference if I want to ...
Mason's user avatar
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7 votes
3 answers
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I have terminals attached to a battery, which will conduct high-current (40A to 200A), and these are copper plates. As the plates, and battery terminals are not perfectly even (even if they appear to),...
ria's user avatar
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I'm in need of 14 VDC @ 100 amps. Switching power supplies are available but too costly. I have enough supplies left over from various desktops to assemble such a beast it's just how? This is to power ...
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I am working on a high current application, and I am wondering, which maximizes current (over a short period of time), using a bank of small caps, or using fewer large caps?
Maz's user avatar
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I'm trying to create a suitable response to Pumping a few Amps for a 100usec. The OP wants to create a 5A current pulse for 100us. They want to have a current rise time of 1us at the start of the ...
Rocketmagnet's user avatar
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If we have the connection shown below (star connection of the secondary part of a TX), the load per each phase is equivalent (balanced load), then the vector sum of ...
Adban's user avatar
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5 answers
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I have a question regarding the AC circuit shown below. If we ignore the voltage drop caused by the long cable, I think the device will work and the circuit can be considered as a closed circuit. Now ...
Adban's user avatar
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I tend to design my circuits around H-bridges, but the problem with making them out of standard mosfets is that I always have to compare the rise times, fall times, threshold voltage, etc of my n-...
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In this video a high-current transformer secondary coil is shorted with numerous thick pieces of metal - pieces of rather thick wire and a knife blade. All those pieces either get red-hot or just melt....
sharptooth's user avatar
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I am wanting for safety a uC to determine a few environmental checks before a device is allowed to be activated, it is a relatively low voltage (2V) however high current (4A) load (powered by a beefy ...
Kenny Robinson's user avatar
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I was looking to build a system for high currents (say ~30 amps) and a friend suggested vacuum tubes. In theory, vacuum tubes seemed more robust for high current applications, but after looking around,...
Alex Eftimiades's user avatar
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I have a moving system at 20meters from, say, a base station. The system consumes more or less 200W at 12V. I used until now a battery to power the system. The main drawback is that I have to recharge ...
Pelotudo's user avatar
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3 answers
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An inductor doubtfully will be in a position to be of harm, however a solenoid with 1A+ running through it (and of course a lot of it stored in the magnetic field) can certainly harm the circuit, if ...
Kim N.'s user avatar
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8 votes
3 answers
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I see every day high voltage, high current; high voltage, low current. I rarely see low voltage, high current; why? I know that I can take a high voltage, high current signal, send it through a step-...
IDLacrosseplayer's user avatar
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2 answers
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I have one Arduino and I need to be able to control five to seven 12V motors that each draw about 4 amps. Would I be able to use four Sabertooth 2X5 Regenerative Motor Drivers for this? Each driver ...
Drew Gottlieb's user avatar
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29 votes
7 answers
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I need to pass high current on some part of my circuit. I used an online PCB track width calculator to see that required track width is about 5mm and minimum clearance is 1mm, which makes it about 7mm ...
hkBattousai's user avatar
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30 votes
6 answers
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We need to carry high currents on a PCB (~30Amps sustained), so we are likely to order our PCBs with high copper thickness. So far we've only used 35 microns (1 oz) in our designs, so 'high thickness' ...
SomethingBetter's user avatar
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7 votes
9 answers
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I need to design a circuit that can turn a DC motor on and off. The motor is like a winch motor on a truck an can draw high amounts of current, in some cases up to 200Amps. The motor runs at standard ...
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