Let's take a look at LDRs, how they work, and their uses. If you would like to support me to make Simply Electronics even better, you can become a Patron at / simplyelectronics
You all probably dont give a shit but does anybody know of a tool to log back into an Instagram account? I was dumb forgot my login password. I would love any tricks you can offer me.
@Hector Marshall thanks so much for your reply. I got to the site thru google and im waiting for the hacking stuff atm. Seems to take quite some time so I will reply here later with my results.
I've gone through the whole playlist today and it cleared up a lot of stuff, thank you! I'm getting curious about electronics and this was just what I needed :)
Thank you for some really interesting tutorials, great stuff. Gives me some confidence to tackle an up coming project which has a very practical application on resolving a automotive issue. May need some guidance. Thanks again.
thanks lot!I watched all of simply electronic basics playlist.its help me lot for educating electronics.i am new for electronic so please tell me someone did this playlist cover all basics of electronics?
Hi there, I have enjoyed your Basic Electronics series very much and even used it for teaching! So great work! 🙂👍Haven't you considered making some more videos with simple circuits, also created in Everycircuit! I could for example envision some with crystals, LF amplifiers, RF amplifiers, emitter followers, common base amplifiers, transformer circuits, mixer circuits, simple oscillators like Pierce and Collpits types, a Wien Bridge oscillator, a Wheatstone Bridge, a Maxwell Bridge and other DC or AC measurement bridges, Low pass, High pass and Bandpass filters, circuits with opamps and equivalent circuits illustrating how capacitors, inductors and resistors work at high frequencies. What do you think?
Regarding the geometric properties of the resist, is the external area of the resist (the brightness area) the only factor, or does its behavior differ with respect to thickness?
Hi, great videos. I'm teaching an extra-curricular club course in my school. I'm trying to create a dark-detector for my students to take home. I've seen many videos on youtube, but none of them explained how their LDR worked. It seems we have different LDR and ratings. Can you explain how to make a night light with an LDR? Please include the power ratings of the LDR and the resistors that are necessary, which no one else does. Thanx
hey just wanted to let you know this is an amazing channel. but im wondering how do you manage to be an engineer and simultaneously upload such good content on youtube?
Thank You! I manage with difficulty which is why I don't upload as often as I'd like. The support from you guys keeps me motivated to keep this channel going. As long as I have the support and viewership I'll continue to create and upload in the spare time I get.
Hey! Explain Working priciple also on atomic level. //wht happnd int it when photons strike semiconductor? wht cause free its electron nd how resistivity drops???
Are there LDRs that increase resistance when it’s surrounding get brighter? In other words: the same way there are PTC and NTC thermistors, are there positive and negative LDRs?
Regarding the geometric properties of the resist, is the external area of the resist (the brightness area) the only factor, or does its behavior differ with respect to thickness?
Very simply explain. My question is why ldr uses resistor when circuit is made with it. Does it not work with using a resistor with it? If it works, Why? And if not, why not. This is my question to you. Thanks for today.
Can Someone help me, I’m so confused because for example in street lights as it gets dark there is more resistance. How I would interpret that is if there is more resistance then less current can flow through the circuit meaning that there is less light. But this doesn’t seem to be the case?
Hi. I'm trying to find out about LDR's. Nobody ever seems to answer, maybe they just don't know the answer. If I introduced and LDR to the tamper circuit of an average alarm system, and with a laser pointer pointed at it, would the current flow freely enough to keep the alarm system running without a fault? And if I then turn off the laser, would the resistance be great enough to trigger the alarm?
As you said that the resistance increases under dark conditions then how the streets lights on automatically at night? can any one clear my doubt why this LDR is used in street lights where street lights are used only night time where as LDR doesn't work during night as its resistance increases and becomes a bad conductor
where can i buy those clips for the multimeter and how do i attach them to my multimiter sticks? they look very handy to mesure resistors and elettrolitic capacitors
I’m confused. If more light lowers the resistance, that would mean that there would be more current flowing through the circuit, powering the load (an LED for example). So, if there’s less light, there’s higher resistance, lowering the amount of current in the circuit. So the LED would turn off. At least, that’s how I’m understanding it. Is that right? Because that doesn’t make sense to me. I thought that you would want to power an LED or other kind of light source when it got dark?
Are they used in digital cameras (still/video) to put the image into electrical signals (analog/digital)? I think I have read/heard that variable capacitors are used that vary capacitance with the amount of light in cameras so maybe this is a thing of the past.
1) iphone brightness (your screen automatically gets brighter or darker in response to the light hitting it) 2) cameras automatically adjust the amount of light that is allowed in based on an LDR
Im confused. When light hits it, it has lower resistance and when its dark it has higher resistance. How will the street light or night life power on if the resistance is high? Pls help me understand thank you.
bro if it is a bright morning, you will have more light, so its resistance is lower and the current can easily flow through the resistor and power the street light. And at night, there is darkness and you have higher resistance , the current cant flow through the resistor and doesnt power the street light.
Tip/Trick : you can use LED instead of LDR, in case you do not have one or such :) makezine.com/projects/make-36-boards/how-to-use-leds-to-detect-light
