JohnMarcson
Administrator
I got a comment on my youtube 120vac video. Any truth to the Reply or My Reply?
- Comment-Interesting how the 120v lights seem to "keep time" better than their 12v counter parts.
- Reply-This is because the nature of AC voltage acts like a built-in clock signal, so the lights are synchronized by the frequency of the AC voltage. DC doesn't have that advantage, so things tend to drift after awhile.
- My reply- In the two I have opened (there are others I haven't looked at yet) the power supply converts the AC to DC before it hits the timing circuit so I'm not sure how the AC 60hz wave matters. The power supplies I have looked at are basically DC supplies with a converter. The speed and pattern are a lot more simple. They do drift, but not like a 120fpm quad flash. Also it is hard to notice the drift when it is one flash every 10 seconds. I notice the same thing with my DC 60fps aircraft supplies, they seem to drift less but it is an illusion of the pattern. Youtube user DrFrankenStrobe would know for sure, he rebuilds lots of supplies.