LED Blinking current measure

[Jimmygoh78]

I have a project to measure current reading while LED blinking, what tools should I use because the current reading is 0.5A while on and 0A while off; 3 cycle of LED blinking. Thanks for help.

[GerdW]

Hi Jimmy,

apparently you need some DAQ devices. Which one do you use currently?

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@Jimmygoh78 wrote:

because the current reading is 0.5A while on and 0A while off; 3 cycle of LED blinking.

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You are reading 0.5A when the LED is on? Which kind of LED?

[Jimmygoh78]

I have DAQ device USB-6003.

This is LED lighting PCBA, 10LED in a board; so that current about 0.5A; but I need ensure the LED blink in 3 cycle. 

[GerdW]

Hi Jimmy,

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@Jimmygoh78 wrote:

I have DAQ device USB-6003.

This is LED lighting PCBA, 10LED in a board; so that current about 0.5A; but I need ensure the LED blink in 3 cycle. 

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How do you want to control that "LED lighting PCBA" (whatever that is)?

When you use a plain USB6003 you will need:

- add a relais to switch on/off that board

- use an external current sensor to measure the current, choose from a simple shunt (apply Ohm's law!) to some "real" current sensors (I prefer current transducers from LEM)…

I guess you know the basics of electrics/electronics/measurements?

[Jimmygoh78]

Can use software (programming) to measure blinking frequency instead of hardware measure?

[GerdW]

Hi Jimmy,

when the signal is outside of your computer then you need some hardware to bring that signal inside your computer. After this you can apply software analyzing the signal…