rrmuttFeb 15
Oh hey another janky AC-DC converter like the one spotted in @mossmann ‘s shredder. How does it work? 1/3
Show threadrrmuttFeb 15
You will notice no transformers. That's a 300Ω resistor and the big brown cap is 560nF. That makes a highpass. It's not the L-topology RC filters you may have studied -- the R is not to ground, it's in series. 2/3
Show threadrrmuttFeb 15
The highpass filters the AC and reduces the amplitude by 20dB -- a factor of 10. So 120VAC in becomes 12VAC out. This goes to the classic bridge rectifier and smoothing cap for roughly 12VDC out. 3/3
Show threadMichael OssmannFeb 16
@rrmutt My eyes are cringing from the 60 Hz flicker from here.
Show threadMichael OssmannFeb 16
@rrmutt well, 120 Hz actually
Show threadrrmutt
@mossmann To be fair it does have a filter cap, unlike the horrid holiday light strings...
Feb 16 at 12:42amWeb
Show threadDen of EarthFeb 16

@rrmutt @mossmann
Has anyone else noticed cars with aftermarket high beams that flicker noticeably if they're in your peripheral vision?

The province I'm in has mandatory daytime running lights which many manufacturers implement (on lower end cars) as half-power high beams, which means if you're unlucky enough to have one behind you...

In related news:
https://www.cbc.ca/news/canada/british-columbia/vancouver-vehicle-headlight-brightness-safety-concerns-9.7061810

Vancouver city council calls on feds to address headlight brightness | CBC News

Advocates say car headlights are not only too bright, but also too high up on larger vehicles, sometimes aiming at eye level. They say the lights blind other drivers, cyclists and pedestrians.

CBC