On Sat, 29 Sep 2012 08:44:22 -0700, Jim Thompson
wrote:

On Sat, 29 Sep 2012 07:18:57 -0500, "Rick"
wrote:


"Jim Thompson" wrote in
message ...
On Fri, 28 Sep 2012 21:57:20 -0500, legg wrote:

On Thu, 27 Sep 2012 12:44:00 -0700, Jim Thompson
wrote:

AC Cap Dropper DC Power Supply

Anyone know of a clever way to regulate other than the typical
brute-force zener clamp?

...Jim Thompson

Power level? Input range?

RL

0.8W, Input is 220VAC/50Hz full-wave-rectified.

...Jim Thompson
[snip]

The capacitor must go between the AC line and input to the bridge. It uses
the reactance of the capacitor as a dropping resistor.


Nonsense, all it requires is a _changing_ input.

...Jim Thompson

With appropriate discharge paths. If the cap is before the rectifier,
the source can do this, otherwise........

RL