Non-Contact Voltage Tester | How does it work?

your description of a schmitt trigger isn't very good. A schmitt trigger changes the switching thershhold voltage in the other direction of the output voltage whenever the output gets switched.. That prevents any signal which is close to the switching voltage from switching on and off rapidly due to noise or a small changing signal.

You call me young?! how old are you?!

love the ergometric design of your home made version. it looks like the perfect hand held shape that you can hold for hours

That's the trouble with the Liberal Industrial Establishment, it takes jobs away from hard working Americans. Back in my day, we used to call a non-contact voltage tester an apprentice.

ElectroBOOM does not have eyebrows, he has *eyebrow*, singular and skookum as frig. He uses it in place of steel wool. I had hoped for a Big Clive reference to pliers of knowledge or at least use of unreasonable force..

I adore the fact that he is drawing circuits and talking about voltage dividers while drawing them WITH a graphite voltage divider ...

Careful you don't damage your multimeter using two red leads. You don't want +++'s going in both sides!

I wish I knew 10% of what AvE has forgotten over the years.

"You are the capacitor" Me: blushes

anyone else tilt their screen trying to make the reflection go away on the test meter? FAK!

I appreciate your effort in explaining how these actually work. Wasted. I still am convinced that it´s JFM.

I am a 12 year licensed journeyman electrician. I have owned many of those fluke hot sticks, hands-down the best option for under 600v noncontact meters. That was a little difficult to keep up with but then again maybe that’s because I was driving while watching. Well, that and there’s a big difference between electrical work and electronics work. At any rate well done sir.

Love the Youtube buddy reference

you dident stick it in the vise,

Thank you for the videos. Between you, MrPete222 and Abom79 and I now own a lathe and a Bridgeport. Neither of which I had ever used prior to starting watching your videos about a little over a year ago. I consider the 3 of you my experience, talent and curiosity. Keep up the great work and know you're effecting others with what you are doing. I'm adding to my plastics and woods hobby shop with a lot of machinist equipment and honing those skills.

It flashes happily when near a charge. You should get an industrial design award for this. I haven't seen more civilized use of hot glue and cardboard in Youtube.

The original 'voltstick' only use one FET and 2 AA's, the gate of the fet going to a wire in the tip next to the led, so it was an open gate, didn't even need a pushbutton, very little to go wrong. sensitivity adjustment was bu placing a finger close to the tip to attenuate the signal. The Schmidt trigger is not exactly a square wave, as the voltage rises it 'toggles' to on, as it falls it toggles to off, there's a bit of hysteresis in the system too.

One of those ticker testers saved me and my buddy's life at work one day. We were at Irving tissue in their switchgear room getting ready to add another section to the row of breaker racks. The Journeyman we were working under, along with a plant maintenance worker, disconnected the power and locked out the section we were to work on. Then we were given instructions to remove the side panels and remove the bolts holding the copper bus bars together to get ready for the new section. We got the covers all off and were getting the sockets and wrenches ready when I told my buddy "wait" and I pulled out my ticker pen just to make sure. That shit started ringing more than 12" away from the bars so I got out my meter and measured a full 600v across all phases. Turns out they cranked out the wrong breaker... Jeff was literally walking up to that thing with a wrench about to start working on those bus bars and I put my arm out to stop him when I said "wait". 1600amps 600v , about 30' from the exit, we would have been dead for sure!

holy shit, that book of resistors... that's a good fscking idea.

This is undoubtfully your best video yet