We don't know what it is but from the OP's Fritzing, it is clearly a high power 12V led. Rc limits the AVERAGE current drawn by the It's not an ordinary led. int customDelay,customDelayMapped // Defines variables "Individual strobe flashes typically only last around 200 microseconds, but can be sustained for greater or lesser periods of time depending on the strobe's intended use."įollowed by 33.133 mS OFF for a frequency of I'd suggest you use the "blink without delay" sketch and try a m:s ratio of around 1:20 at a frequency of 20Hz. Rc limits the AVERAGE current drawn by the LED.
Rb just limits the current from the digital output pin - so typically 200 ohm? In the diagram C1 (try 1000uF) stores energy for the flash, so the 5V rail is not overloaded.
So one way is to blast a lot of energy (stored in a capacitor) through the LED. If you make them longer they will seem brighter, but the "freeze" effect will not be as good. However you can try it with a common high intensity white LED.ģ: If you make the on time very short compared to the off time the light pulses will seem dim. I'm not sure COB leds are ideal, you really want something like a CREE Q4 or Q5 You can also do it with a high power LED. This has been done with xenon discharge "flash" tubes. 1: PWM is no good for a strobe if you want to be able to change the frequency incrementallyĢ: to "freeze" a moving object you need very SHORT intense pulses of light.
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