Usually, there is a strong enough 50/60 Hz potential on the human body to simply detect it. And this will require 4 transistors, not 4 chips. 😉
@BillAnt
Ай бұрын
Some people can actually feel the 50/60Hz when holding the metal body of a phone or other devices plugged into a charger. Myself included, it's a weird feeling sort of like a very low constant electrocution.
@f33net
Ай бұрын
@@BillAnt That's not what you're talking about. And you will not feel 50/60 Hz from chargers, there are none there, the conversion frequency is much higher. :)
@BillAnt
Ай бұрын
@@f33net - Whatever it is, I can feel it on some devices. It may be the buck-converter's frequency, but there's definitely something there.
@robstamm60
Ай бұрын
@@f33netYou can actually get capacitive coupling of mains voltage into the shielding of isolated chargers - sometimes the voltage differential can even be high enough to be painful when touching the shielding.
@concretesloth2968
Ай бұрын
@@BillAnt is it like a tingling/vibrating sensation when u rub a metal surface connected to a plug?
@tonys9860
Ай бұрын
Have you tried touching the gate of the MOSFET to turn the light on and off? Without the other circuitry?
@BillAnt
Ай бұрын
The MOSFET may be sensitive, but you need to hold a constant logic level, otherwise it would flicker, or worse burn out.
@10e999
Ай бұрын
Such a cool channel ! You have a new subscriber !
@Kaliumcyanidful
19 күн бұрын
Nice! Love the compactnes! Since PCB Way is Sponsoring this, Wouldn’t a custom pcb for this Circut make Sense?🤪
@5VLogic
17 күн бұрын
Yeah, I was considering it, but was short on time and didn't get it done.
@Rouverius
Ай бұрын
Cool. Wonder how the other flipflop could be used. Maybe to have two different light levels settings?
@__MINT_
Ай бұрын
Was the problem with triggering the circuit by interference solved? I've made a very similar thing a few years ago, and had the exact same problem. Now I think that I'd add a one way low pass filter (slow charge, fast discharge via a diode) at the comparator's input, so that very short pulse wouldn't be enough to create a clock pulse. Touching it creates very long pulse compared to the one created by interference
@5VLogic
Ай бұрын
I think so but can't be sure because I haven't tested It thoroughly. The low pass filter is definitely a good idea, I should try that.
@bob_mosavo
Ай бұрын
Thanks 👍
@shawon265
Ай бұрын
Isn't it possible to swap the flip-flop with another op-amp? Maybe a positive feedback circuit or something? It'd be hall cool if it can be done just on 1 quad op-amp ic
@5VLogic
Ай бұрын
Yeah, that's a good point, I thought about it, because it would have been cool, but I couldn't think of an actual way to pull it off.
@Torogol85
Ай бұрын
The LM358 is a general purpose op-amp, not a voltage comparator. This whole circuit works gracefully because the 358 is capable of impersonating a voltage comparator, and save the day unscathed. This is a nice, simple circuit which I would like to build, but I think I'll replace the LM358 with an actual comparator, like the LM393 (dual comp). Its open collector outputs require using a pull-up resistor
@5VLogic
Ай бұрын
Good observations 👍
@Sctronic209
Ай бұрын
Very nice.
@ahmedalshalchi
Ай бұрын
Nice design idea but it is not commercially acceptable ... I recommend you use HT7704 series which will finish all without headache ..
@88farrel
Ай бұрын
I like your funny word magic man
@aerena
Ай бұрын
It would be nice if you share circuit diagram.
@SusanAmberBruce
Ай бұрын
There are plenty of purpose built ic's for touch sensors 😅 and very cheap
@alexstone691
Ай бұрын
Please tell me where you got that light, i found one at flea market but it had a white base but no marking whatsoever
@5VLogic
Ай бұрын
I think from IKEA, but not sure, it was probably a gift
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