I converted a PCB UV Exposure box I made from Fluoro to UV LED's but on testing current draw
I found it to be well bellow what it should be unless I used an unregulated power supply.
Am I missing something?
Led strip with 120 X 3528 LED's,
40 Resistors marked 151, dimensions approximately 1.5 X 0.5
Wattage per LED 0.08W
Recommended drive mode 12v constant voltage.
1 X 12V regulated P/S Open circuit voltage 12.37VDC 1.5A Capacity
1 X 12V unregulated P/S Open circuit voltage 18VDC 1.0A Capacity
LED Strip connected to Regulated Power supply
voltage 12.37VDC
Current: 0.27A
Per LED: 0.00225
Wattage: 0.027
Similar results for other Regulated 12V Power supplies with =< 0.4A Current seems to vary
between different 12V regulated power supplies. Switch-mode and Transformer types.
LED Strip connected to Unregulated power supply
Voltage 13VDC
Current 0.8A.
Per LED: 0.00666
Wattage: 0.086
The unregulated P/S seems the right one, but why are the Regulated ones
down to three times lower.
If I measure across both I get 12.37 or so and 13VDC respectively which is the
voltage drop across the strip/s, so both currents should be pretty much the same?
I found it to be well bellow what it should be unless I used an unregulated power supply.
Am I missing something?
Led strip with 120 X 3528 LED's,
40 Resistors marked 151, dimensions approximately 1.5 X 0.5
Wattage per LED 0.08W
Recommended drive mode 12v constant voltage.
1 X 12V regulated P/S Open circuit voltage 12.37VDC 1.5A Capacity
1 X 12V unregulated P/S Open circuit voltage 18VDC 1.0A Capacity
LED Strip connected to Regulated Power supply
voltage 12.37VDC
Current: 0.27A
Per LED: 0.00225
Wattage: 0.027
Similar results for other Regulated 12V Power supplies with =< 0.4A Current seems to vary
between different 12V regulated power supplies. Switch-mode and Transformer types.
LED Strip connected to Unregulated power supply
Voltage 13VDC
Current 0.8A.
Per LED: 0.00666
Wattage: 0.086
The unregulated P/S seems the right one, but why are the Regulated ones
down to three times lower.
If I measure across both I get 12.37 or so and 13VDC respectively which is the
voltage drop across the strip/s, so both currents should be pretty much the same?
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