How do you recycle solar panels?
On Sat, 13 Apr 2019 23:42:59 +0800, "Mr. Man-wai Chang" <> wrote: It is hard to recycle anything without pollution. If you have to ship it a 1000 miles or more to get to the recycling plant, you have...
8

MV Distribution w/Floating Neutral?
Hello, all. I was in Cedar Rapids, IA recently (I don't reside there) traveling along Rt. 100 (Collins Rd) in northeast of downtown. I noticed utility poles with a single cross arm accommodating 4...
15

Touch potential
I'm learning at least a little bit about touch potential. Most of what I've found is related to the guys who work on power lines. I did find this sketch of a guy touching a lamp post with 120 volts on...

Equipment grounding
I work for a company that sells center pivot irrigation systems. A common situation is the pivot and electric well motor are powered from a commercial utility. The electrical service is three phase,...
13

Function of Portable Generator Outlet Ground
Hello, all. As most portable consumer-grade AC generators don't have their grounds (frame and ground prongs on their mounted AC outlets) bonded to their neutrals, I was wondering what useful function...
13

Mil spec pots
I am looking for a couple off wet location/mil spec pots (25 and 500 ohm) Any ideas
4

DROP . . .BOX [an inexact cross-post from sci.math]
is my Dropbox link. Full although not a complete list of items [thoughts]. -Simon Roberts tinkerers
1

Wrong signs in three formulas of electrotechnics
Lorentz force formula F=qvB has been obtained by experiment. It can be derived from third Hertz's equation: rot E = -d/dt B - rot(v x B) if derived in such way it changes sign, F=-qvB. Another two...

Is Class 1 laser safe enough for baby eyes?
I meant, what if someone accidentally shine Class 1 laser into a baby's eyes? Would it hurt retina and leave a permanent damage? I know ... I know... it should NOT happen. Adults are supposed to be...

Dimmer for 4V LED
I have a 4V, 0.75A, 3W power adapter (120V input) that powers a single LED that is too bright. Is there a way to make or purchase a dimmer that could work on the low power side? Thanks
4

MV-to-LV Connection
Hello, all, and a question especially for those who work in AC power distribution: One is provided with two line-line MV (assume 34/19.9 kV or less) distribution lines (L1, L2) and a neutral (N). IOW,...

Fwd: Can LED bulbs be connected to a flasher?
-------- Forwarded Message -------- Subject: Can LED bulbs be connected to a flasher? Date: Mon, 14 May 2018 14:08:24 -0500 From: Organization: NNTP Server Newsgroups: A friend with a small retail...

jammer for 595-625 MHz
Could you help me to find this jammer, please?
9

URGENT Test for alternating current without multmeter
I have a lenovo n22 laptop. I am posting this message on it. I was watching i a youtube video when I realized that the ac/dc adapter was unplugged, whe n I plugged it back in, my laptop made a...

off topic cross post
an off topic cross post If you think you got it then either use it or lose it. don't expect it like it's your birthright. reiterating: 'use it or lose it' especially in the w ay your forefathers were...