This wont be perfect as the calculator only works to 2 decimal places in Vf and it will change slightly with the temperature of the boards. As they get hotter the Vf should drop to maintain a contstant current
This wont be perfect as the calculator only works to 2 decimal places in Vf and it will change slightly with the temperature of the boards. As they get hotter the Vf should drop to maintain a contstant current
Awesome! I have to learn how to use that calculator.
So HLG was kind enough to mail me a replacement 132 board. I repeated the measurements. With the driver set to the highest current, I got 35.6V for 3 boards and 35.5V for the new one, for a total around 142 volts. I reinforced this measurement by taking the voltage across all boards, pic below. So far so good! But when I connect the multimeter to measure current with 4 boards I topped out at 1. 67 after running all night. I, once again, connected each individual board to the driver to confirm I could run each at 1.9. I then connected 3 boards and was able to run them at 1.9A. The individual board voltages (measured after setting the driver to 1750 running a single board) came out the same as above.
So I'm not toping out the voltage, but still can't run the 4 board setup at the rated current of 1.75A. I'm totally confused. Anyone have any ideas?
Attachments
4 boards
Current for single board
Current across 4 boards with driver turned all the way up
The figures don't add up, at 142v the multimeter should be reading over 2 amps, or at 1.67 amps the multimeter should be reading less than 142 volts. I'm guessing the multimeter isn't giving accurate readings.
If the readings are accurate, which I'm sure they are not, you are still getting 234watts, which isn't too far short.
The figures don't add up, at 142v the multimeter should be reading over 2 amps, or at 1.67 amps the multimeter should be reading less than 142 volts. I'm guessing the multimeter isn't giving accurate readings.
If the readings are accurate, which I'm sure they are not, you are still getting 234watts, which isn't too far short.
I'll get a new one and go at it again. Be back....
