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- Jan 14, 2011
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Hey everyone. I love doing circuit design, and I think I may have stumbled upon something great here - a continuously adjustable voltage drop test load.
This test load should be capable of driving up to 3A or more, depending on the set resistor used (I figure 3A would be a reasonable upper limit). Then, you can adjust the voltage drop (measured however, I could probably just add a measurement point for voltage drop) with a simple, 10 turn potentiometer or what have you.
The only problem here is that, when measuring low-current output drivers, the test load itself will be consuming a significant amount of power. I'm thinking a test load that one simply plugs into the wall, complete with voltage drop and current output read out on an LCD display.
I will probably make one of these for myself (it seems like a useful tool), but I wanted to see if anyone else would be interested.
EDIT:
So it won't be necessary to have an external power source of any sort - I figured out a way to make it all work a lot more simply! This should actually be revolutionary when it comes to test loads, because you will be able to precisely choose your voltage output. Also, it shouldn't be too expensive for a basic version Going to place an order for the PCB now, will have updates in a few weeks.
This test load should be capable of driving up to 3A or more, depending on the set resistor used (I figure 3A would be a reasonable upper limit). Then, you can adjust the voltage drop (measured however, I could probably just add a measurement point for voltage drop) with a simple, 10 turn potentiometer or what have you.
The only problem here is that, when measuring low-current output drivers, the test load itself will be consuming a significant amount of power. I'm thinking a test load that one simply plugs into the wall, complete with voltage drop and current output read out on an LCD display.
I will probably make one of these for myself (it seems like a useful tool), but I wanted to see if anyone else would be interested.
EDIT:
So it won't be necessary to have an external power source of any sort - I figured out a way to make it all work a lot more simply! This should actually be revolutionary when it comes to test loads, because you will be able to precisely choose your voltage output. Also, it shouldn't be too expensive for a basic version Going to place an order for the PCB now, will have updates in a few weeks.
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