by explaining the use of various resistors you gave me a new understanding as to why we pull the signal off the negative side.... adding a resistor is like making a voltage divider... as I understand... the various secondary resistors allow different values to come off the photo resistor... R2=R1*Vout/(Vin - Vout).... where R2= 220ohms, R1= CdS, Vout = yellow wire reading at Arduino, Vin=5 volts... I am sure this formula should be rewritten to determine Vout, but the voltage divider formula makes sense for choosing different R2 values....
Great introductory video! You should make another video regarding the applications of photoresistors such as switching on LED's and or logging the values.
i am confused. when you explained the flow, you said Vcc flow through photoresistor, then to the 220 resistor, then to the analog and ground. But i thought the flow was on the opposite way because negative electrons flow towards positive protons. Can you help me understand please?
look up a discussion on conventional electron flow vs actual electron flow... you are correct, but originally 100+ years ago they thought electrons flowed from positive to negative - this is conventional electron flow... most diagrams still follow this philosophy... there is a great explanation at "simply electronics Basis, how batteries work): th-cam.com/video/9HlD40SLwr0/w-d-xo.html
hello, i have a question regarding on the resistance value. is there a lowest requirement value for the resistance(maybe at least 220 need to be use or any value)? if yes, is there any formula to calculate or prove that? looking forward for your reply
hello, great video,very inspiring, ...it gave me an idea. how can i control 8 Fotorezistors and log the lighting conditions over from each individual Fotorezistor(placed in different areas) using just arduino or just one raspberry pi ? basicaly i want to place 8 sensors around a small room and log the light intensity throughout a day. i'm thinking that neither arduino or raspberry pi has enough gpio pins... please help me understand how i could log data from 8 Fotorezistors at the same time placed in different areas.
Now to put 2 of them on a sled.. and have it always go to where the strongest light source is. "Herb garden"............... it's okay it's almost legal in most states just say it......... if you want to spend a lot of money growing weed............. Im sure you can have a dimmer switch on your lights too... just dim or brighten to keep at that point. Happiness? You mean money.... which i guess relates to productivity. Cant even take a crap at work with out the automated lights turning off .. anything to save a penny.
Hi Sir! thank you so much for the videos are really helpful. if you don't mind could you combine soil moisture sensor, analog temperature sensor and photoresistor light sensor and make one project for automated irrigation please. share with us the codes please
Hey bro! God I miss the "Daily Blobs"!!!! Any idea whats going on with your live streaming ability? I understand yT is being cryptic with you and that sucks! Could you release a video on yT updating your fans on the whole shituation as it stands currently please? Always appreciate your work! I hope Peanut, Micro Mama, your wife, your beautiful driveway and your very complex interesting life are all doing very well! Spaghetti Monster Bless You and the family! Here's a tumblin meatball all covered in sauce coming to ya bro. :) Peace! :) :) :)
by explaining the use of various resistors you gave me a new understanding as to why we pull the signal off the negative side.... adding a resistor is like making a voltage divider... as I understand... the various secondary resistors allow different values to come off the photo resistor... R2=R1*Vout/(Vin - Vout).... where R2= 220ohms, R1= CdS, Vout = yellow wire reading at Arduino, Vin=5 volts... I am sure this formula should be rewritten to determine Vout, but the voltage divider formula makes sense for choosing different R2 values....
Great introductory video! You should make another video regarding the applications of photoresistors such as switching on LED's and or logging the values.
Exactly what I needed - thank you!
Fantastic! Homemade spectrometer, here I come!
You deserve a knighthood
You saved me from script kiddies and they are vicious
Thank you Eli! Liking the info and presentation. Cool stuff.
My define doesnt work. When I define A5, it doesnt highlight in blue. Anyone who knows what the problem is ?
i am confused. when you explained the flow, you said Vcc flow through photoresistor, then to the 220 resistor, then to the analog and ground. But i thought the flow was on the opposite way because negative electrons flow towards positive protons. Can you help me understand please?
look up a discussion on conventional electron flow vs actual electron flow... you are correct, but originally 100+ years ago they thought electrons flowed from positive to negative - this is conventional electron flow... most diagrams still follow this philosophy... there is a great explanation at "simply electronics Basis, how batteries work): th-cam.com/video/9HlD40SLwr0/w-d-xo.html
hello, i have a question regarding on the resistance value.
is there a lowest requirement value for the resistance(maybe at least 220 need to be use or any value)? if yes, is there any formula to calculate or prove that?
looking forward for your reply
Can the value output be Watts per meter squared?
hello, great video,very inspiring, ...it gave me an idea.
how can i control 8 Fotorezistors and log the lighting conditions over from each individual Fotorezistor(placed in different areas) using just arduino or just one raspberry pi ?
basicaly i want to place 8 sensors around a small room and log the light intensity throughout a day.
i'm thinking that neither arduino or raspberry pi has enough gpio pins...
please help me understand how i could log data from 8 Fotorezistors at the same time placed in different areas.
Now to put 2 of them on a sled.. and have it always go to where the strongest light source is.
"Herb garden"............... it's okay it's almost legal in most states just say it......... if you want to spend a lot of money growing weed.............
Im sure you can have a dimmer switch on your lights too... just dim or brighten to keep at that point.
Happiness? You mean money.... which i guess relates to productivity. Cant even take a crap at work with out the automated lights turning off .. anything to save a penny.
and they already automated the single ply toilet tissue dispenser. So lets go!!! :( Tight wads! haha
Hi Sir! thank you so much for the videos are really helpful.
if you don't mind could you combine soil moisture sensor, analog temperature sensor and photoresistor light sensor and make one project for automated irrigation please. share with us the codes please
how could i reach you Sir emali?
we can use it in ' public lights ' to save energy
!!
Can you pls explain this comment i dont know what you mean how can I save energy
@@woolliedev make public lights work only if there is no light (sun's light) it could be automated instead of turning them on at a static time
@@rezmed1144 i think most of the people do this my dad has this in the bathroom.but it is a good idea for sure
Hey bro! God I miss the "Daily Blobs"!!!! Any idea whats going on with your live streaming ability? I understand yT is being cryptic with you and that sucks! Could you release a video on yT updating your fans on the whole shituation as it stands currently please? Always appreciate your work! I hope Peanut, Micro Mama, your wife, your beautiful driveway and your very complex interesting life are all doing very well! Spaghetti Monster Bless You and the family! Here's a tumblin meatball all covered in sauce coming to ya bro. :) Peace! :) :) :)