ampedtech
Member
I got these LED arrays off Amazon.
I wanted to measure the current draw.
Connected the FLUKE 87V leads to COM and mA uA in series with the battery (12V 8Ah ) and the lamp as shown.
An unexpected event occurred.
What I did expect is a steady current flow.
The first instant the meter reads 5mA+
In about 1/2 sec The current dropped to 1+mA
The current kept dropping, but not in a linear fashion.
From 0.04mA to 0.03mA took 10 sec
From .0.02mA to 0.01mA took 30 sec
Eventually the ammeter reads 0.00
At no time does the array dim.
Not sure if this relevant but, these LED "bulbs" have no polarity requirements. This tells me that there is some circuitry aboard the "bulb". This perceived circuitry is why I put a ? next to the word "simple"
There is conflict in the Amazon post in the "Technical Details" it states 30w.
In the posters blurb they indicate 1.5w
There is a link to these LED arrays:
I wanted to measure the current draw.
Connected the FLUKE 87V leads to COM and mA uA in series with the battery (12V 8Ah ) and the lamp as shown.
An unexpected event occurred.
What I did expect is a steady current flow.
The first instant the meter reads 5mA+
In about 1/2 sec The current dropped to 1+mA
The current kept dropping, but not in a linear fashion.
From 0.04mA to 0.03mA took 10 sec
From .0.02mA to 0.01mA took 30 sec
Eventually the ammeter reads 0.00
At no time does the array dim.
Not sure if this relevant but, these LED "bulbs" have no polarity requirements. This tells me that there is some circuitry aboard the "bulb". This perceived circuitry is why I put a ? next to the word "simple"
There is conflict in the Amazon post in the "Technical Details" it states 30w.
In the posters blurb they indicate 1.5w
There is a link to these LED arrays: