Recent content by TechGuy2016

Berkeman, Thank you. Clearly, I need to observe more about the circuit. (It is a lot of work as you can imagine, but I need to get this phenomenon figured out, so I will make the configuration again.) Sometime early next week will be my next chance to set it up and observe. Once I do so, I will...

Well, if I leave the array as a simple daisy-chain, then each strip is progressively more dim due to the stacked voltage drop. What I do to manage this, is connect both the leading end and the trailing wire ends of the LED strip array to the power supply lead wire so as to balance the load. That...

Jim, Thank you for the detailed response. However, I do not understand what you mean about a sub-standard power supply. Please consider that this phenomenon happens will all power supplies, including robust lab grade power supplies. (I have about 15 different lab supplies, including some well...

Well, if I leave the array as a simple daisy-chain, then each strip is progressively more dim due to the stacked voltage drop. What I do to manage this, is connect both the leading end and the trailing wire ends of the LED strip array to the power supply lead wire so as to balance the load. That...

Unfortunately, I do not have the voltage data. I made the set-up a little while back and stored the data in an excel file. If I remember correctly, the total voltage drop was down to about 10.5V, measured on any of the strips. Does that help?

Here is the plot. As for the voltage, there is a voltage drop that increases as each strip is added to the circuit.

Oh, right. Sorry, I did not mention the composition of the LED strips. The Strips are three LED's in series with a ballast resistor per segment. There are 36 LED's (12 segments) per strip. Power is 3W (250mA @ 12VDC) per strip of 36 LED's.

Thanks for the responses. This phenomenon happens with all power supplies such as many clean (Agilent) lab power supplies and with LED drivers. Also, I have tried to use large 16AWG gauge wire from the power supply, but still get the same results. I must use 20AWG to each strip because that is...

The power supply is a 12VDC 60W (5A max), commercial grade, constant voltage power supply. It is made specifically as an LED driver. The wiring is 20awg. The length between each LED strip is about three inches. The wire from the power supply is 20AWG and is eight inches. Note that I kept the...

I often create LED arrays, and have encountered a common issue where, as the LED load is increased, the total current requirement is not a linear factor as each branch (LED strip) is added to the circuit. It is common to have many branches of LED strips on a 12VDC 60W power supply. Power...