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Re: [TCML] SRSG strobe


They make high brightness LEDs now that are very effective.  I would stick with a red, yellow, green, or blue LED rather than white, as the white LEDs use a phosphor that may have a persistent afterglow that will smear out your timing marks.

Drive your chosen LED with full wave bridge rectified but unfiltered 60 Hz AC, and you will get 120 flashes per second.

If you want to get fancy, you can use a pair of NPN transistor inverters in series to detect the zero crossings and turn on the LED only at that time for a shorter light pulse.  Otherwise, driving the LEDs with unfiltered but rectified AC of the proper voltage will give you light pulses only at the peak of the AC waveform, ninety degrees away from the power line zero crossings.

If you connect several LEDs in series, you will get not only more light, but a sharper light pulse corresponding to the peak of the rectified AC sine waves.


On 10/21/2018 11:37 PM, Daniel Kunkel wrote:
I'm getting ready to build my phase controller to control my new SRSG. I
thought I've heard of others use an automotive ignition timing light to
strobe and watch the phasing, but I can't get mine to trigger off a 60Hz
source. Can anyone offer some advice here?

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