@
tomiiv30 OP and @
gdnrbob I ordered the resistor and capacitor over the internet yesterday to build the simple low-pass filter. Hopefully I will have them in about a week.
100K 1 watt resistor
https://www.ebay.com/itm/5-pack-1-watt-5-carbon-film-resistors-100k-ohm/160460118738?hash=item255c2b...22uf non polarized capacitor.
https://www.amazon.com/22mfd-Non-Polarized-Grade-Mylar-Capacitor/dp/B00B4DVXJE Eva (DIY Forum member) didn’t give the voltage rating for the 22uf non polarized capacitor so to be on the safe side I ordered 250V.
I’ll post back with the testing results on how it works.
Here is a link of a wiring diagram that shows the wiring, configuration, of a low-pass filter. (Disregard the white paper for the use in the paper). It’s the best I could find for a wiring diagram of the simple circuit.
https://www.electronics-tutorials.ws/filter/filter_2.htmlYou need to redraw the simple circuit and add some wordage.
** ELIMINATE THE EARTH GROUND CONNECTION AS SHOWN ON THE BOTTOM LINE OF THE DRAWING. (This line will be the AC neutral.)
Note on the left side of the drawing the two Vin AC (sine wave) line inputs. You will connect these to the 120Vac male plug. I would suggest the top line (resistor) connect to the Hot blade screw terminal of the plug. The bottom Line (other end of the capacitor) to the neutral blade screw terminal of the 120Vac plug.
The right side of the drawing where it says (Vout) is where the DMM probes connect to.
Edit:
Another wiring diagram showing the Low-Pass Filter.
In the last post by
atmasphere in the link he provided there is a post with this link showing an Intergator Low-Pass filter.
http://www.animations.physics.unsw.edu.au//jw/RCfilters.html#lowLow-Pass Filter
scroll down the page to, "Integrator" . Note the diagram is the same as the first diagram for a Low-Pass filter.
You don’t need an electrician to build, assemble, this low-pass filter to measure for DC offset on the AC mains. All you need to find is an electronic service tech. Or anyone with any experience in wiring a simple resistor capacitor circuit together.
Jim
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