Salve a Tutti,
Sorry for interfering.
That circuit is not mysterious. The transformer is. ...its connections to the circuit, too.
Precisely, about transformers. To me, the following is new:
I did not know that you could "feed" the primary of a transformer with some sinus or square
voltage via a single wire
and get any 'volts out' in a (not loaded, indeed
See, for example, case #4 (picture number 3) with square waves.
The basic (but nicely easily operated, no?) Falstad simulator
gave me a big nothing.
Please, do not believe that these are just useless volts junk.
Actually, I just figured out -with another experiment- that I was able to light
a 220 Vols/1 watts Led bulb out of a single wired (not grounded) single (cored) coil.
Yes, this bulb is not fully lighted.
My question could be:
Does a single wire (= not a "'real" 'circuit'"
) consume amps? According to a cheap meter, it does.
Ex: without the Leds: (about) 8 ma. With the Leds: 4 ma. This behavior is not new for me.
Actually, with a very very simple CCT
, I'm able (as anybody(?)) to light this kinda (1W to 4W) leds bulbs
with 1.5 volts and 10-80 ma.
Now? Are 20 volts AC-sinus Pk-to PK and 4 ma too much to get about the same result than
with 1.5 Vols-DC/10-20ma???
I do not thrust this cheap meter. Is it able -In the AC-Amp range - to measure things
at about 20 Khz? I have to test this with my (40 Y.old) scope and a one ohm resistor...
Anyway, here are my 3 pictures:
Avec mes salutations les plus cordiales,
=============================="Spell Check" out of order