Questions tagged [dummy-load]
A "dummy load" is a replacement element for an item that would normally function as an electrical load.
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LTspice resistor value stepping
I have built a DC power supply circuit in LTspice with a current limiter and voltage foldback.
The circuit works, but I want to take a load resistor and set it to 1 Ω initially, then step it down ...
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Power dissipation calculation of MOSFET: for selecting a MOSFET as Dummy load
I am designing a dummy load, and it should be capable of sinking around 75 A @ 80 V (not always, varies from 10 to 75 A). I want to choose MOSFET for the application as shown in the image.
I would ...
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Can I control IGBT linearly with gate voltage?
I want to make a dummy load using IGBT. Is it possible to control the Ice (collector to emitter current) using the gate voltage? It would be really great if it is possible to explain the answer. The ...
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How to find minimum load for 5V rail of the power supply? [closed]
I have 450 ATX 12V V 2.2 power supply. I am going to use this power supply as my power bench supply. But I couldn't find the minimum load that takes on 5V rail. Beacuse its pretty old PSU and no ...
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Highly accurate DIY friendly (cheap) power load
To avoid XY question, I start with my motivation and then my question.
I have an Emporia Vue2 (in-panel) power sensor but it is known not to be very accurate. For me there is a discrepancy between the ...
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Conveyor zero speed problem relay, smart relay
Our company bought a bunch of outdoor conveyor belts that need to plug into each other for power and communications. The power is 4160 V and each one has a transformer to 480 V. That power is ...
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Can a BNC through-load be used as the load to SOL-calibrate a VNA?
Related to this question, I'm having a hard time finding a female 50-ohm load to calibrate a reference plane at the end of a male BNC feedline. However, feed-through loads are readily available.
Is ...
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Is there anything particularly special about a "short" and an "open" in a VNA calibration kit?
I would like to calibrate a VNA with the reference plane at the end of a male BNC feedline. Surprisingly, female SOL kits are hard to find. There are many BNC 50-ohm loads available but I'm having ...
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Simulated speaker dummy load for solid state
This is specific for 6 string electric guitar amplifiers. The convention appears to be use a resistor equal to the nominal DCR of the intended speaker load, usually 4 or 8 Ω.
What I have found out was,...
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Will a 10 Ω resistor create 2.5 W of dummy load on 5 V line (using an old ATX PSU)?
I am trying to understand something about dummy load resistors.
I have an old ATX PSU. It has a 5 V line; maximum is 34 A, but it says it needs a minimum of 0.5 A. That means it needs a minimum load ...
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Is there such thing as a load generator for testing a modular power supply unit?
I have built a modular power supply - and I was wondering if such thing exists to generate a mock load.
I have two supply blocks and I need to make sure they are supplying adequate current. I can hook ...
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Is this avalanche rugged MOSFET suitable for linear operation?
I would like to create an active load which draws current(4 to 6A) from a 12V battery. Unfortunately, the shipping costs and delivery times have prevented me from buying Linear FETs directly from well ...
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Help with Dummy Load Design
I'm trying to make a dummy load inspired by this one by GreatScott, and I'm using parts I have on hand. Here's the constant-current source design I'm using:
I'm hoping to test a 12V power supply with ...
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Dummy Load to test a 200 watt 24 volt supply
I feel like I have a simple question that hopefully can be answered quite quickly. I have a 24V power supply that is supposed to achieve a max output of 200W. Recently, I have reason to believe that ...
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50 ohm Dummy Load With 50dB Attenuator
I am designing a 50 ohm 10 watts dummy load for 100-1000MHz frequency range. The signal strength should not exceed -10dBm.
The load must be able to dissipate 5 watts minimum, that is +37dBm.
The ...
