- Nov 25, 2016
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To give everyone an idea of how it will work, below is a photo made tonight from the illuminator mounted below my camera, with the camera operating in daytime mode.
For this test the illuminator is running at continuous output, which means it is too bright. Fortunately I now have a current mode LED driver that can be pulsed at a frequency up to 10 kHz, with a rise time of less than 10 microseconds. I am connecting that to an NE555 circuit which will generate 1 millisecond pulses at a frequency of approximately 100 Hz, resulting in a duty cycle of ~ 10%. To the eye, the light will look much dimmer, while the camera should capture multiple frames each second at full illumination - or at least that's what I'm hoping.
I've got a few more parts arriving this week, and then I'll give it the acid test.
For this test the illuminator is running at continuous output, which means it is too bright. Fortunately I now have a current mode LED driver that can be pulsed at a frequency up to 10 kHz, with a rise time of less than 10 microseconds. I am connecting that to an NE555 circuit which will generate 1 millisecond pulses at a frequency of approximately 100 Hz, resulting in a duty cycle of ~ 10%. To the eye, the light will look much dimmer, while the camera should capture multiple frames each second at full illumination - or at least that's what I'm hoping.
I've got a few more parts arriving this week, and then I'll give it the acid test.