Shivam Kumar
INDIA • + Follow
Tools, APP Software Used etc.
|
KiCADKicad
|
Description
DARKNESS DETECTOR CIRCUIT USING LDR
DARKNESS DETECTOR CIRCUIT USING LDR
5th PCB Design Contest
Date- 28th December 2022
Submission By- Shivam Kumar
Introduction
A circuit that detects darkness or a lack of light is known as a darkness detector or dark detector. In this project, we've used the LDR, the most basic of all light sensors, to construct a straightforward darkness detector circuit (Light Dependent Resistor). These darkness detector circuits can be utilised in systems that switch on lights automatically when it becomes dark. Some parts are passive, such as capacitors and resistors. LED has been used as an alarm to signal nighttime. This straightforward project's goal is to use an LDR to detect darkness and an LED to illuminate it.
Circuit Diagram of Darkness Detector
The following image shows the simple circuit diagram for the Darkness Detector project implemented using LDR and transistor BC547.
Working
- In this project, a straightforward darkness detector is created. Transistor and LDR are two extremely basic components used in the project's implementation (a few passive components as well). Here, the project's operation is discussed.
- The LDR's resistance decreases dramatically in the presence of sufficient light. Under these circumstances, the voltage divider created by the LDR and 1 k resistor will output almost 0V. You won't see any output at the transistor's output pin as a consequence.
- The amount of light shining on the LDR will be reduced if we obstruct it with a hand or other object. The LDR's resistance will rise as resistance does. The light detection will work since an LED was attached to the transistor IC's output pin. As a result, the LED will be off while there is sufficient light on the LDR, and it will turn on and shine when it is dark.
Advantages
- It is a very straightforward darkness detector with extremely minimal hardware and circuitry.
- This project may be implemented without the need of any complicated microcontroller circuitry or programming.
Disadvantages
- The system is transistor-controlled; therefore, the outcomes might not be as precise as anticipated.
Applications
- This project may be used in systems that turn on lights automatically when it becomes dark.
- This circuit may be a component of a larger system or undertaking, such as a home automation or security system.
Code
code for the circuit
Python
(kicad_sch (version 20211123) (generator eeschema)
(uuid 69b6118e-46cc-4a9b-a714-f6db15c83bc4)
(paper "A4")
(title_block
(title "DARKNESS DETECTOR CIRCUIT USING LDR ")
)
(lib_symbols
(symbol "Connector:Screw_Terminal_01x02" (pin_names (offset 1.016) hide) (in_bom yes) (on_board yes)
(property "Reference" "J" (id 0) (at 0 2.54 0)
(effects (font (size 1.27 1.27)))
)
(property "Value" "Screw_Terminal_01x02" (id 1) (at 0 -5.08 0)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "screw terminal" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Generic screw terminal, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/)" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "TerminalBlock*:*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "Screw_Terminal_01x02_1_1"
(rectangle (start -1.27 1.27) (end 1.27 -3.81)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type background))
)
(circle (center 0 -2.54) (radius 0.635)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -0.5334 -2.2098)
(xy 0.3302 -3.048)
)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -0.5334 0.3302)
(xy 0.3302 -0.508)
)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -0.3556 -2.032)
(xy 0.508 -2.8702)
)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -0.3556 0.508)
(xy 0.508 -0.3302)
)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(circle (center 0 0) (radius 0.635)
(stroke (width 0.1524) (type default) (color 0 0 0 0))
(fill (type none))
)
(pin passive line (at -5.08 0 0) (length 3.81)
(name "Pin_1" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin passive line (at -5.08 -2.54 0) (length 3.81)
(name "Pin_2" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "Device:LED" (pin_numbers hide) (pin_names (offset 1.016) hide) (in_bom yes) (on_board yes)
(property "Reference" "D" (id 0) (at 0 2.54 0)
(effects (font (size 1.27 1.27)))
)
(property "Value" "LED" (id 1) (at 0 -2.54 0)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "LED diode" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Light emitting diode" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "LED* LED_SMD:* LED_THT:*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "LED_0_1"
(polyline
(pts
(xy -1.27 -1.27)
(xy -1.27 1.27)
)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.27 0)
(xy 1.27 0)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 1.27 -1.27)
(xy 1.27 1.27)
(xy -1.27 0)
(xy 1.27 -1.27)
)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -3.048 -0.762)
(xy -4.572 -2.286)
(xy -3.81 -2.286)
(xy -4.572 -2.286)
(xy -4.572 -1.524)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.778 -0.762)
(xy -3.302 -2.286)
(xy -2.54 -2.286)
(xy -3.302 -2.286)
(xy -3.302 -1.524)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "LED_1_1"
(pin passive line (at -3.81 0 0) (length 2.54)
(name "K" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin passive line (at 3.81 0 180) (length 2.54)
(name "A" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "Device:R" (pin_numbers hide) (pin_names (offset 0)) (in_bom yes) (on_board yes)
(property "Reference" "R" (id 0) (at 2.032 0 90)
(effects (font (size 1.27 1.27)))
)
(property "Value" "R" (id 1) (at 0 0 90)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at -1.778 0 90)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "R res resistor" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Resistor" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "R_*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "R_0_1"
(rectangle (start -1.016 -2.54) (end 1.016 2.54)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "R_1_1"
(pin passive line (at 0 3.81 270) (length 1.27)
(name "~" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin passive line (at 0 -3.81 90) (length 1.27)
(name "~" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "Mechanical:MountingHole" (pin_names (offset 1.016)) (in_bom yes) (on_board yes)
(property "Reference" "H" (id 0) (at 0 5.08 0)
(effects (font (size 1.27 1.27)))
)
(property "Value" "MountingHole" (id 1) (at 0 3.175 0)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "mounting hole" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Mounting Hole without connection" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "MountingHole*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "MountingHole_0_1"
(circle (center 0 0) (radius 1.27)
(stroke (width 1.27) (type default) (color 0 0 0 0))
(fill (type none))
)
)
)
(symbol "Sensor_Optical:LDR07" (pin_numbers hide) (pin_names (offset 0)) (in_bom yes) (on_board yes)
(property "Reference" "R" (id 0) (at -5.08 0 90)
(effects (font (size 1.27 1.27)))
)
(property "Value" "LDR07" (id 1) (at 1.905 0 90)
(effects (font (size 1.27 1.27)) (justify top))
)
(property "Footprint" "OptoDevice:R_LDR_5.1x4.3mm_P3.4mm_Vertical" (id 2) (at 4.445 0 90)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "http://www.tme.eu/de/Document/f2e3ad76a925811312d226c31da4cd7e/LDR07.pdf" (id 3) (at 0 -1.27 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "light dependent photo resistor LDR" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "light dependent resistor" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "R*LDR*5.1x4.3mm*P3.4mm*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "LDR07_0_1"
(rectangle (start -1.016 2.54) (end 1.016 -2.54)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -2.286)
(xy -4.064 0.254)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -2.286)
(xy -2.286 -2.286)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -2.286)
(xy -1.524 -1.524)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -0.762)
(xy -4.064 1.778)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -0.762)
(xy -2.286 -0.762)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy -1.524 -0.762)
(xy -1.524 0)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "LDR07_1_1"
(pin passive line (at 0 3.81 270) (length 1.27)
(name "~" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin passive line (at 0 -3.81 90) (length 1.27)
(name "~" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "Transistor_BJT:BC547" (pin_names (offset 0) hide) (in_bom yes) (on_board yes)
(property "Reference" "Q" (id 0) (at 5.08 1.905 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "BC547" (id 1) (at 5.08 0 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "Package_TO_SOT_THT:TO-92_Inline" (id 2) (at 5.08 -1.905 0)
(effects (font (size 1.27 1.27) italic) (justify left) hide)
)
(property "Datasheet" "https://www.onsemi.com/pub/Collateral/BC550-D.pdf" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) (justify left) hide)
)
(property "ki_keywords" "NPN Transistor" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "0.1A Ic, 45V Vce, Small Signal NPN Transistor, TO-92" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_fp_filters" "TO?92*" (id 6) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "BC547_0_1"
(polyline
(pts
(xy 0 0)
(xy 0.635 0)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 0.635 0.635)
(xy 2.54 2.54)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 0.635 -0.635)
(xy 2.54 -2.54)
(xy 2.54 -2.54)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 0.635 1.905)
(xy 0.635 -1.905)
(xy 0.635 -1.905)
)
(stroke (width 0.508) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 1.27 -1.778)
(xy 1.778 -1.27)
(xy 2.286 -2.286)
(xy 1.27 -1.778)
(xy 1.27 -1.778)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type outline))
)
(circle (center 1.27 0) (radius 2.8194)
(stroke (width 0.254) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "BC547_1_1"
(pin passive line (at 2.54 5.08 270) (length 2.54)
(name "C" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin input line (at -5.08 0 0) (length 5.08)
(name "B" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
(pin passive line (at 2.54 -5.08 90) (length 2.54)
(name "E" (effects (font (size 1.27 1.27))))
(number "3" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "power:+5V" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
(property "Reference" "#PWR" (id 0) (at 0 -3.81 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Value" "+5V" (id 1) (at 0 3.556 0)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "global power" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Power symbol creates a global label with name \"+5V\"" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "+5V_0_1"
(polyline
(pts
(xy -0.762 1.27)
(xy 0 2.54)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 0 0)
(xy 0 2.54)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
(polyline
(pts
(xy 0 2.54)
(xy 0.762 1.27)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "+5V_1_1"
(pin power_in line (at 0 0 90) (length 0) hide
(name "+5V" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
)
)
(symbol "power:GND" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
(property "Reference" "#PWR" (id 0) (at 0 -6.35 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Value" "GND" (id 1) (at 0 -3.81 0)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "" (id 2) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "" (id 3) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_keywords" "global power" (id 4) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "ki_description" "Power symbol creates a global label with name \"GND\" , ground" (id 5) (at 0 0 0)
(effects (font (size 1.27 1.27)) hide)
)
(symbol "GND_0_1"
(polyline
(pts
(xy 0 0)
(xy 0 -1.27)
(xy 1.27 -1.27)
(xy 0 -2.54)
(xy -1.27 -1.27)
(xy 0 -1.27)
)
(stroke (width 0) (type default) (color 0 0 0 0))
(fill (type none))
)
)
(symbol "GND_1_1"
(pin power_in line (at 0 0 270) (length 0) hide
(name "GND" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
)
)
)
(junction (at 167.64 73.66) (diameter 0) (color 0 0 0 0)
(uuid 65e22610-92bd-4263-af0d-c69219a35e98)
)
(junction (at 167.64 110.49) (diameter 0) (color 0 0 0 0)
(uuid 7d163a8a-15ca-49d6-85e4-0a7738794435)
)
(junction (at 152.4 110.49) (diameter 0) (color 0 0 0 0)
(uuid a7f192c3-1f21-420d-acb5-8465d3c6710c)
)
(junction (at 152.4 91.44) (diameter 0) (color 0 0 0 0)
(uuid c72622f0-fedb-408a-b4c8-d12bb88f04df)
)
(junction (at 152.4 73.66) (diameter 0) (color 0 0 0 0)
(uuid fdb2dd04-1996-4e77-a979-4c8bb3a08849)
)
(wire (pts (xy 167.64 91.44) (xy 167.64 105.41))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 008ca605-9d34-448b-aa27-265cd6f54306)
)
(wire (pts (xy 152.4 91.44) (xy 152.4 102.87))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 22640163-8bb1-4ba2-8369-34c2fac38476)
)
(wire (pts (xy 152.4 81.28) (xy 152.4 91.44))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 35f425e5-a649-44e2-aead-c33a22527844)
)
(wire (pts (xy 152.4 110.49) (xy 167.64 110.49))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 4a0c26e9-73b4-44e2-8d08-f7c7ccf8496a)
)
(wire (pts (xy 138.43 110.49) (xy 152.4 110.49))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 4a32f346-7285-46a6-ade1-a9221d8ed14f)
)
(wire (pts (xy 152.4 73.66) (xy 167.64 73.66))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 569da972-bc13-4d37-9cef-80293bcbc781)
)
(wire (pts (xy 167.64 67.31) (xy 167.64 73.66))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 5a358c4f-49e6-4264-8041-a4b84c6bfa99)
)
(wire (pts (xy 184.15 81.28) (xy 184.15 87.63))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 87880dcc-af66-46ec-8948-d90d17d08166)
)
(wire (pts (xy 138.43 90.17) (xy 138.43 73.66))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid 90c924d3-c5c0-4d3b-be66-d82f377350c4)
)
(wire (pts (xy 184.15 95.25) (xy 184.15 100.33))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid a950a5c0-3110-42ac-8c20-fe472c37e0a4)
)
(wire (pts (xy 167.64 110.49) (xy 167.64 113.03))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid bf6614f0-1ad9-4af0-bcf7-979087f5b7c0)
)
(wire (pts (xy 167.64 73.66) (xy 184.15 73.66))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid d045d2d8-060f-4541-a8fe-91431d184654)
)
(wire (pts (xy 138.43 73.66) (xy 152.4 73.66))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid d5663892-fe9b-4631-b6b3-a9694d758183)
)
(wire (pts (xy 138.43 92.71) (xy 138.43 110.49))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid e99bdece-4cb0-4a09-b166-1db058e9dd74)
)
(wire (pts (xy 152.4 91.44) (xy 167.64 91.44))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid ef5f4cf2-9b55-48ed-b825-6bbfa6774faa)
)
(wire (pts (xy 167.64 110.49) (xy 184.15 110.49))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid f7e6a464-5508-40e2-9057-2e16acbcd9e4)
)
(wire (pts (xy 167.64 105.41) (xy 176.53 105.41))
(stroke (width 0) (type default) (color 0 0 0 0))
(uuid f898095e-edeb-4001-9a6f-95c424b81485)
)
(symbol (lib_id "power:+5V") (at 167.64 67.31 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid 085e921e-b240-4677-aa91-304e7f01567f)
(property "Reference" "#PWR0101" (id 0) (at 167.64 71.12 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Value" "+5V" (id 1) (at 167.64 62.23 0))
(property "Footprint" "" (id 2) (at 167.64 67.31 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "" (id 3) (at 167.64 67.31 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid 30c64e32-a328-48fe-830d-2dfadb7fea54))
)
(symbol (lib_id "Device:R") (at 152.4 77.47 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid 15339107-eeec-481f-95db-719b3f62a23c)
(property "Reference" "R1" (id 0) (at 154.94 76.1999 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "1k" (id 1) (at 154.94 78.7399 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" (id 2) (at 150.622 77.47 90)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 152.4 77.47 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid 8ad09d23-35cc-4dd6-9cbf-f67dd6257728))
(pin "2" (uuid a65b7dc3-3e05-4bb0-8246-dc10c7e32ee4))
)
(symbol (lib_id "Sensor_Optical:LDR07") (at 152.4 106.68 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid 319bed53-32a2-4b3f-a65e-4b2272313c9c)
(property "Reference" "R2" (id 0) (at 154.94 105.4099 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "LDR07" (id 1) (at 154.94 107.9499 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "OptoDevice:R_LDR_5.1x4.3mm_P3.4mm_Vertical" (id 2) (at 156.845 106.68 90)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "http://www.tme.eu/de/Document/f2e3ad76a925811312d226c31da4cd7e/LDR07.pdf" (id 3) (at 152.4 107.95 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid bbe553ca-94dc-46fd-a33d-ae9687863aa6))
(pin "2" (uuid 2ea81174-331a-4863-9e7b-f0ef9e3a0bfb))
)
(symbol (lib_id "Connector:Screw_Terminal_01x02") (at 133.35 92.71 180) (unit 1)
(in_bom yes) (on_board yes)
(uuid 442cc8c9-7cd1-4643-976a-96c04497b75c)
(property "Reference" "J1" (id 0) (at 133.35 86.36 0))
(property "Value" "Screw_Terminal_01x02" (id 1) (at 129.54 88.9 90))
(property "Footprint" "TerminalBlock:TerminalBlock_bornier-2_P5.08mm" (id 2) (at 133.35 92.71 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 133.35 92.71 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid ccfca6b0-873c-4ee0-a57a-e278b943e2ee))
(pin "2" (uuid 5c5ff5b8-13d2-4bb7-b794-cdc15433816a))
)
(symbol (lib_id "Mechanical:MountingHole") (at 93.98 77.47 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid 525cdcf8-cc6a-4e6c-a379-2ffa7be40b83)
(property "Reference" "H1" (id 0) (at 96.52 76.1999 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "MountingHole" (id 1) (at 96.52 78.7399 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "MountingHole:MountingHole_2.2mm_M2_Pad_Via" (id 2) (at 93.98 77.47 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 93.98 77.47 0)
(effects (font (size 1.27 1.27)) hide)
)
)
(symbol (lib_id "Mechanical:MountingHole") (at 93.98 95.25 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid 66d9a295-7791-4cb1-9f7c-67dde7265d54)
(property "Reference" "H3" (id 0) (at 96.52 93.9799 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "MountingHole" (id 1) (at 96.52 96.5199 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "MountingHole:MountingHole_2.2mm_M2_Pad_Via" (id 2) (at 93.98 95.25 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 93.98 95.25 0)
(effects (font (size 1.27 1.27)) hide)
)
)
(symbol (lib_id "Mechanical:MountingHole") (at 93.98 104.14 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid ac9002d4-0c6c-4c3c-993b-df745197239f)
(property "Reference" "H4" (id 0) (at 96.52 102.8699 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "MountingHole" (id 1) (at 96.52 105.4099 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "MountingHole:MountingHole_2.2mm_M2_Pad_Via" (id 2) (at 93.98 104.14 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 93.98 104.14 0)
(effects (font (size 1.27 1.27)) hide)
)
)
(symbol (lib_id "Transistor_BJT:BC547") (at 181.61 105.41 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid c001f9cf-0ff3-43f4-bb02-4afb6a7a2b0b)
(property "Reference" "Q1" (id 0) (at 186.69 104.1399 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "BC547" (id 1) (at 186.69 106.6799 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "Package_TO_SOT_THT:TO-92_Inline" (id 2) (at 186.69 107.315 0)
(effects (font (size 1.27 1.27) italic) (justify left) hide)
)
(property "Datasheet" "https://www.onsemi.com/pub/Collateral/BC550-D.pdf" (id 3) (at 181.61 105.41 0)
(effects (font (size 1.27 1.27)) (justify left) hide)
)
(pin "1" (uuid 64cb767a-d271-4478-b0b0-06674e921f6c))
(pin "2" (uuid ff12a2c2-d380-4eda-9122-22c71ab21667))
(pin "3" (uuid 2dfe5c01-ac1d-4467-80c7-3a191a8d7c30))
)
(symbol (lib_id "Device:LED") (at 184.15 91.44 90) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid c3c4aa0d-a389-49e8-b0e9-952e3ea09b51)
(property "Reference" "D1" (id 0) (at 187.96 91.7574 90)
(effects (font (size 1.27 1.27)) (justify right))
)
(property "Value" "LED" (id 1) (at 187.96 94.2974 90)
(effects (font (size 1.27 1.27)) (justify right))
)
(property "Footprint" "LED_THT:LED_D3.0mm" (id 2) (at 184.15 91.44 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 184.15 91.44 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid df4ebde5-387e-42cd-8eb7-5c1794cd4861))
(pin "2" (uuid d6ed9c27-f2de-4635-abc4-a6f66da55085))
)
(symbol (lib_id "power:GND") (at 167.64 113.03 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid d8af74d2-7608-46c8-ac40-fd216d081e99)
(property "Reference" "#PWR0102" (id 0) (at 167.64 119.38 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Value" "GND" (id 1) (at 167.64 118.11 0))
(property "Footprint" "" (id 2) (at 167.64 113.03 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "" (id 3) (at 167.64 113.03 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid 86ecd5a2-fa15-4615-931c-73db912884f9))
)
(symbol (lib_id "Device:R") (at 184.15 77.47 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid e697437e-38cf-4ed9-86f2-da12f4d34f08)
(property "Reference" "R3" (id 0) (at 186.69 76.1999 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "470 ohm" (id 1) (at 186.69 78.7399 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal" (id 2) (at 182.372 77.47 90)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 184.15 77.47 0)
(effects (font (size 1.27 1.27)) hide)
)
(pin "1" (uuid 2277e3ca-c379-48fa-985b-cdfbaa0f9dfd))
(pin "2" (uuid 2459dc8d-ee64-41d6-8b50-33ec1bafd2eb))
)
(symbol (lib_id "Mechanical:MountingHole") (at 93.98 86.36 0) (unit 1)
(in_bom yes) (on_board yes) (fields_autoplaced)
(uuid f0accb7c-d5f1-40fa-b2da-6dad958b2eac)
(property "Reference" "H2" (id 0) (at 96.52 85.0899 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Value" "MountingHole" (id 1) (at 96.52 87.6299 0)
(effects (font (size 1.27 1.27)) (justify left))
)
(property "Footprint" "MountingHole:MountingHole_2.2mm_M2_Pad_Via" (id 2) (at 93.98 86.36 0)
(effects (font (size 1.27 1.27)) hide)
)
(property "Datasheet" "~" (id 3) (at 93.98 86.36 0)
(effects (font (size 1.27 1.27)) hide)
)
)
(sheet_instances
(path "/" (page "1"))
)
(symbol_instances
(path "/085e921e-b240-4677-aa91-304e7f01567f"
(reference "#PWR0101") (unit 1) (value "+5V") (footprint "")
)
(path "/d8af74d2-7608-46c8-ac40-fd216d081e99"
(reference "#PWR0102") (unit 1) (value "GND") (footprint "")
)
(path "/c3c4aa0d-a389-49e8-b0e9-952e3ea09b51"
(reference "D1") (unit 1) (value "LED") (footprint "LED_THT:LED_D3.0mm")
)
(path "/525cdcf8-cc6a-4e6c-a379-2ffa7be40b83"
(reference "H1") (unit 1) (value "MountingHole") (footprint "MountingHole:MountingHole_2.2mm_M2_Pad_Via")
)
(path "/f0accb7c-d5f1-40fa-b2da-6dad958b2eac"
(reference "H2") (unit 1) (value "MountingHole") (footprint "MountingHole:MountingHole_2.2mm_M2_Pad_Via")
)
(path "/66d9a295-7791-4cb1-9f7c-67dde7265d54"
(reference "H3") (unit 1) (value "MountingHole") (footprint "MountingHole:MountingHole_2.2mm_M2_Pad_Via")
)
(path "/ac9002d4-0c6c-4c3c-993b-df745197239f"
(reference "H4") (unit 1) (value "MountingHole") (footprint "MountingHole:MountingHole_2.2mm_M2_Pad_Via")
)
(path "/442cc8c9-7cd1-4643-976a-96c04497b75c"
(reference "J1") (unit 1) (value "Screw_Terminal_01x02") (footprint "TerminalBlock:TerminalBlock_bornier-2_P5.08mm")
)
(path "/c001f9cf-0ff3-43f4-bb02-4afb6a7a2b0b"
(reference "Q1") (unit 1) (value "BC547") (footprint "Package_TO_SOT_THT:TO-92_Inline")
)
(path "/15339107-eeec-481f-95db-719b3f62a23c"
(reference "R1") (unit 1) (value "1k") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
)
(path "/319bed53-32a2-4b3f-a65e-4b2272313c9c"
(reference "R2") (unit 1) (value "LDR07") (footprint "OptoDevice:R_LDR_5.1x4.3mm_P3.4mm_Vertical")
)
(path "/e697437e-38cf-4ed9-86f2-da12f4d34f08"
(reference "R3") (unit 1) (value "470 ohm") (footprint "Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal")
)
)
)
Schematic and Layout
Circuit diagrams and schematics
circuit diagrams and schematics.zip
gerber_PCBWay Community.zip
CAD-Custom parts and enclosures
Documentation
DARKNESS DETECTOR CIRCUIT USING LDR.zip
Dec 28,2022
2,036 views
DARKNESS DETECTOR CIRCUIT USING LDR
In this project, we've used the LDR, the most basic of all light sensors, to construct a straightforward darkness detector circuit.
2036
0
0
Published: Dec 28,2022
BOM(Bill of materials)
Centroid file
PCBWay Donate 10% cost To Author
File Last Updated: 2024/09/24 (GMT+8)
File update record
2024-09-2411:07:51
Gerber file is updated.
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
Under the
Attribution-ShareAlike (CC BY-SA)
License.
- Comments(0)
- Likes(0)
Upload photo
You can only upload 5 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP
0 / 10000
More by Shivam Kumar
You may also like
-
-
-
-
kmMiniSchield MIDI I/O - IN/OUT/THROUGH MIDI extension for kmMidiMini
142 0 0 -
DIY Laser Power Meter with Arduino
221 0 3 -
-
Box & Bolt, 3D Printed Cardboard Crafting Tools
191 0 2
