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Capacitive Dropper - Revision history
2026-06-08T03:49:42Z
Revision history for this page on the wiki
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https://w.electrodragon.com/w/index.php?title=Capacitive_Dropper&diff=29192&oldid=prev
Chao at 10:55, 24 January 2021
2021-01-24T10:55:31Z
<p></p>
<p><b>New page</b></p><div>=== Basic RC Buck ===<br />
<gallery><br />
File:2019-05-14_004805.png| Basic RC Buck<br />
File:RC buck.png | C1 / R1 / BD1 / DZ1<br />
</gallery><br />
<br />
{| class="wikitable sortable"<br />
|-<br />
! Part !! Description<br />
|-<br />
| C1 || Buck step down capacitor<br />
|-<br />
| R1 || discharge resistor<br />
|-<br />
| BD1 || bridge diode (4pcs of 1N4007)<br />
|-<br />
| DZ1 || Zener diode (24V, 12V, 5V, etc)<br />
|}<br />
<br />
== Documents ==<br />
* [[Safety capacitor]]<br />
== Reference ==<br />
* https://www.eevblog.com/forum/projects/non-isolated-acdc-buck-converter-with-no-transformer-for-microcontroller/<br />
Maybe it was a simple capacitive dropper power supply (use a capacitor and resistor to go down to about 10-30v then use a linear regulator? )<br />
* See this appnote : http://ww1.microchip.com/downloads/en/appnotes/00954A.pdf<br />
* Use guide [[File:Capacitive_dropper.pdf|:File:Capacitive_dropper.pdf]]<br />
[[category: Non-Isolated ACDC]]</div>
Chao