It just doesn't work for me, unless I ground myself, like to the metal of my computer first, and then it sometimes doesn't trigger it. the only way to get it working right is to touch ground and the pin at the same time. I've even hooked up a logic probe to pin 3, in case the signal is too weak. still nothing from there. actually, does it matter how long the wire is? mine might be too long, but i'm just wondering.
Could be that your finger is too dry, To increase the sensitivity try to remove the resistor R1 (10M ohm), or change it to a bigger resistor if it is to much.
The working principal of this circuit is that touching pin 2 will introduce noise into the input of the LM555 and the LM555 will be in a state of saturation and will remain so for the length of time defined by C1 (0.01 uf)
I'm so sorry. I haven't come across such a name. Anyway I tried doing the way you have done, but still not able to get it. if you could give a list of components used or a schematic it would be very helpful.
i bet that you are touching ground with another finger while you touch that pin.
jtcressy1 1 year ago
@jtcressy1
pin 2 is very sensitive, you don't need to touch at the ground to activate it.
inbarhovav 1 year ago
@inbarhovav
It just doesn't work for me, unless I ground myself, like to the metal of my computer first, and then it sometimes doesn't trigger it. the only way to get it working right is to touch ground and the pin at the same time. I've even hooked up a logic probe to pin 3, in case the signal is too weak. still nothing from there. actually, does it matter how long the wire is? mine might be too long, but i'm just wondering.
jtcressy1 1 year ago
@jtcressy1
Could be that your finger is too dry, To increase the sensitivity try to remove the resistor R1 (10M ohm), or change it to a bigger resistor if it is to much.
The working principal of this circuit is that touching pin 2 will introduce noise into the input of the LM555 and the LM555 will be in a state of saturation and will remain so for the length of time defined by C1 (0.01 uf)
inbarhovav 1 year ago
schematic?
matstermind 1 year ago
@matstermind
You can find schematic at the description of this video.
inbarhovav 1 year ago
Nice! Do you mind telling the values of the capacitors?
cassianorabelo 1 year ago
@cassianorabelo
all the capacitors in the movie is 0.01 uF
but you can make a delay if you put bigger capacitors between legs 6,7 to the GND
and leave the 0.01 uF between legs 5 to the GND
Inbar
inbarhovav 1 year ago
i like your projects keep going
harysantos 1 year ago
Diagrama?
SAMEDOKAWA 1 year ago
@SAMEDOKAWA cof cof datasheet cof cof
luisfable 1 year ago
I'm so sorry. I haven't come across such a name. Anyway I tried doing the way you have done, but still not able to get it. if you could give a list of components used or a schematic it would be very helpful.
arunmohancr 2 years ago
first of all, i am a woman..
the +5v go to pins 4 and 8
the GND go to pin 1
inbarhovav 2 years ago
@inbarhovav lol i make it that circuit for accident when im tryng to make a counter xD
nice job :p
luisfable 1 year ago
hey man wanted to know where have you connected VCC(+5) to ...
arunmohancr 2 years ago