-=[dEad.wiRe]=-
New Member
Whew. After one long, exasperating day and a whole morning of fulfilling none of my scheduled tasks...
I found it--this forum on electronics--one thing that has always tired me out and gotten on my nerves. I have no idea as to whether this will solve any of my problems and finally help this desperate soul take that practical test which my teacher will definitely not allowed me to take until my group completes this simple LDR circuit which we have spent almost one month assembling--all to no avail.
SIMPLE, isn't it? Indeed, it is. For a student in a science high school with so many requirements to do and subjects all willing to kill--algebra, chemistry, computer science (my favorite science&tech-related subject--I do quite well in it; however, all that HTML encoding takes up so much time), earth science, english (the Science of the English Language and its Several Sub-branches, I would call it) fil, social sciences (all that memorizing will get me dead, all the other sciences (since enumerating each and every one of them would steal so many precious seconds from my limited time), and finally, TECHPREP--Technology Preparation--the subject where BASIC ELECTRONICS is taught.
Now, in order to get my grade for this final quarter, I must be able to build an LDR circuit on a breadboard provided by our teacher with the following five components:
1. Battery
2. LED (Light-Emitting Diode)
3. Potentiometer
4. Transistor
5. LDR (Light-Dependent Resistor)
I have made it already with four of these components. Below is a diagram and some pictures of the circuit I have succeeded in building:
https://i254.photobucket.com/albums/hh101/bukopandanflavoredbloodshake/scan.jpg
(Pics to come)
As you see we lack an LDR--we can't seem to figure out where to place it and how to put it in. We've tried every single LDR available, but no matter what we do, we can't seem to get the desired effect: when LDR is covered, the LED must shut off and not emit any light. Instead, nothing happens; the circuit remains as it is. The LED does not shut off nor dim when the LDR is covered; only the potentiometer can control the brightness of the light it emits. I've tried installing other components such as switches and buzzers, and they worked properly. What do you suppose is wrong then?
How do I install the LDR on the breadboard to make it work? If you could explain it using my diagram, it would be very much appreciated.
I found it--this forum on electronics--one thing that has always tired me out and gotten on my nerves. I have no idea as to whether this will solve any of my problems and finally help this desperate soul take that practical test which my teacher will definitely not allowed me to take until my group completes this simple LDR circuit which we have spent almost one month assembling--all to no avail.
SIMPLE, isn't it? Indeed, it is. For a student in a science high school with so many requirements to do and subjects all willing to kill--algebra, chemistry, computer science (my favorite science&tech-related subject--I do quite well in it; however, all that HTML encoding takes up so much time), earth science, english (the Science of the English Language and its Several Sub-branches, I would call it) fil, social sciences (all that memorizing will get me dead, all the other sciences (since enumerating each and every one of them would steal so many precious seconds from my limited time), and finally, TECHPREP--Technology Preparation--the subject where BASIC ELECTRONICS is taught.
Now, in order to get my grade for this final quarter, I must be able to build an LDR circuit on a breadboard provided by our teacher with the following five components:
1. Battery
2. LED (Light-Emitting Diode)
3. Potentiometer
4. Transistor
5. LDR (Light-Dependent Resistor)
I have made it already with four of these components. Below is a diagram and some pictures of the circuit I have succeeded in building:
https://i254.photobucket.com/albums/hh101/bukopandanflavoredbloodshake/scan.jpg
(Pics to come)
As you see we lack an LDR--we can't seem to figure out where to place it and how to put it in. We've tried every single LDR available, but no matter what we do, we can't seem to get the desired effect: when LDR is covered, the LED must shut off and not emit any light. Instead, nothing happens; the circuit remains as it is. The LED does not shut off nor dim when the LDR is covered; only the potentiometer can control the brightness of the light it emits. I've tried installing other components such as switches and buzzers, and they worked properly. What do you suppose is wrong then?
How do I install the LDR on the breadboard to make it work? If you could explain it using my diagram, it would be very much appreciated.
... Since you had to ask figure I should also mention, that LED should be installed in the opposite direction of the diode in the schematic, which was there for protection.
