Solar-Powered Pedestal Lighting System
The LED lights in this solar-powered pedestal lighting system are powered by the sun. A solar photovoltaic cell first turns solar power into DC electricity, which is then used to charge a…
Know the mission before touching a wire.
Understand what you are making, prepare the right tools, and make the workbench safe.
Project details
Solar-Powered Pedestal Lighting System is a electronics project. The LED lights in this solar-powered pedestal lighting system are powered by the sun. A solar photovoltaic cell first turns solar power into DC electricity, which is then used to charge a…
- Source pages
- 221-224
- Named parts
- 8
- Build goal
- Working, tested prototype
Tools you need
- Digital multimeter
- Wire stripper and side cutters
- Soldering iron with a fine tip
- Current-limited bench supply
Use eye protection, good lighting, and a clean insulated surface throughout the build.
Safety precautions
- Disconnect every power source before changing a connection.
- Check component polarity, pinout, and supply voltage twice.
- Use a current limit for the first power-up.
- Keep liquids, loose metal, and uninsulated wires away from the bench.
Gather, identify, and understand every part.
Use the standardized inventory, then open What's this? to learn each part's role, advantages, limitations, handling, and specifications.
What's this?Image, role, pros, cons, handling & specifications
Power supply
A power component supplies, converts, stores, or regulates energy for the project.
What it does hereIt must provide the documented voltage, polarity, isolation, and sufficient current safely.
Buy / compare this part ↗Advantages
- Stable power improves reliability
- Current limiting protects first tests
- Regulation reduces resets and noise
Limitations
- Wrong polarity can cause immediate damage
- Underrated parts overheat
- Mains circuits require qualified supervision
Handling
- Measure output before connection
- Use a fuse or current limit
- Insulate exposed conductors
Specifications to verify
- Use the exact model, value, package, and rating listed for Power supply; similar-looking parts are not always interchangeable.
- Confirm input/output voltage, current, polarity, connector, isolation, and thermal rating.
What's this?Image, role, pros, cons, handling & specifications
MAXIMUM
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for MAXIMUM; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications
1N5408
A passive component sets current, voltage, timing, filtering, or signal behaviour without adding gain.
What it does hereIts exact value and tolerance determine how the surrounding stage behaves.
Buy / compare this part ↗Advantages
- Simple and dependable
- Low cost
- Easy to measure before installation
Limitations
- A wrong value can stop or damage the circuit
- Ratings must not be exceeded
- Polarized parts require correct orientation
Handling
- Measure unclear values
- Observe capacitor polarity
- Avoid overheating leads while soldering
Specifications to verify
- Use the exact model, value, package, and rating listed for 1N5408; similar-looking parts are not always interchangeable.
- Confirm value, tolerance, power or voltage rating, polarity, and package size.
What's this?Image, role, pros, cons, handling & specifications
SEMICONDUCTOR LEARNING VIEWLM358
A semiconductor stage performs switching, amplification, regulation, rectification, or logic.
What it does hereIt controls current or signal flow at a defined point in the circuit.
Buy / compare this part ↗Advantages
- Fast and efficient
- Compact
- Can control larger loads from smaller signals
Limitations
- Pin order varies
- Sensitive to overvoltage and reverse polarity
- May need cooling or bias components
Handling
- Verify the datasheet pinout
- Avoid static and soldering heat
- Check notch, stripe, or flat-face orientation
Specifications to verify
- Use the exact model, value, package, and rating listed for LM358; similar-looking parts are not always interchangeable.
- Confirm pinout, maximum voltage/current, dissipation, gain or forward voltage, and package.
What's this?Image, role, pros, cons, handling & specifications
POWER LEARNING VIEWLM317
A power component supplies, converts, stores, or regulates energy for the project.
What it does hereIt must provide the documented voltage, polarity, isolation, and sufficient current safely.
Buy / compare this part ↗Advantages
- Stable power improves reliability
- Current limiting protects first tests
- Regulation reduces resets and noise
Limitations
- Wrong polarity can cause immediate damage
- Underrated parts overheat
- Mains circuits require qualified supervision
Handling
- Measure output before connection
- Use a fuse or current limit
- Insulate exposed conductors
Specifications to verify
- Use the exact model, value, package, and rating listed for LM317; similar-looking parts are not always interchangeable.
- Confirm input/output voltage, current, polarity, connector, isolation, and thermal rating.
What's this?Image, role, pros, cons, handling & specifications
NEGATIVE
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for NEGATIVE; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications
T1 - transistor stage identified in the circuit
A semiconductor stage performs switching, amplification, regulation, rectification, or logic.
What it does hereIt controls current or signal flow at a defined point in the circuit.
Buy / compare this part ↗Advantages
- Fast and efficient
- Compact
- Can control larger loads from smaller signals
Limitations
- Pin order varies
- Sensitive to overvoltage and reverse polarity
- May need cooling or bias components
Handling
- Verify the datasheet pinout
- Avoid static and soldering heat
- Check notch, stripe, or flat-face orientation
Specifications to verify
- Use the exact model, value, package, and rating listed for T1 - transistor stage identified in the circuit; similar-looking parts are not always interchangeable.
- Confirm pinout, maximum voltage/current, dissipation, gain or forward voltage, and package.
What's this?Image, role, pros, cons, handling & specifications
PART LEARNING VIEWVR1, VR2, VR3, VR4 - preset potentiometers identified in the circuit
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for VR1, VR2, VR3, VR4 - preset potentiometers identified in the circuit; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
Connect one verified path at a time.
Explore the named components and standardized signal flow, then use Source Check to verify exact physical pins, values, and topology before applying power.
Trace this circuit.
Solar-Powered Pedestal Lighting System: interactive parts, standardized terminals, responsive anchored wires, student explanations, and the original circuit reference in one shared system.
Trace before wiring
Follow power, ground, inputs, processing, and outputs in that order. Never guess a pin from package shape alone.
Connect with power off
Make short, labelled connections and share a common ground only where the schematic requires it.
Inspect every joint
Check continuity, polarity, adjacent shorts, and loose connections before the first power-up.
Open all source diagrams and build views 2 visuals
Confirm the hardware-only control path.
This project does not include firmware in the source. The circuit itself provides the required behaviour.
How to connect
- Match every controller label to the circuit view and source pin map.
- Join grounds before signal wires when separate low-voltage supplies are used.
- Keep motors, relays, pumps, and other loads on a suitable driver and external supply.
Common mistakes
Reversed VCC/GND, board-label versus GPIO-number confusion, missing common ground, and charge-only USB cables.
Troubleshoot
Disconnect loads, continuity-test one path at a time, then test with a current limit.
Software preparation
No IDE, board package, library, or firmware upload is required for this project.
If you add a programmable controller as an extension, document its pin map separately.
How to upload code
The original design is implemented entirely in hardware, so proceed after verifying the circuit and supply.
Assemble, deploy, test, and troubleshoot.
Use the complete source notes in build order, then pass the final checks before calling the project finished.
Build in functional stages
- Power and regulation
- Controller or processing stage
- Inputs and sensors
- Outputs and loads
- Enclosure and strain relief
Power up safely
- Inspect unpowered continuity first
- Apply the lowest safe current limit
- Measure supply rails before signals
- Add one load at a time
- Record expected and actual results
Work from simple to complex
- Confirm power, ground, polarity, and orientation
- Compare each pin with the source
- Test inputs separately from outputs
- Replace only one variable at a time
- Power off before every correction
Follow the documented instructions.
These notes come from this project's source and remain in their original order.
Project overview
Project build noteThe LED lights in this solar-powered pedestal lighting system are powered by the sun. A solar photovoltaic cell first turns solar power into DC electricity, which is then used to charge a storage battery. At night, power LEDs are used to light up the pedestals with the solar energy stored in the battery. The power LEDs on the pedestal are connected to a control unit with a logic circuit that turns them on at night and off during the day. The solar panel that charges the battery is chosen based on how much lighting is needed and how long it needs to be on. Figure 1 is a block diagram of the solar-powered pedestal lighting system that uses power LEDs. Here are the details about the solar panel that is being used: Maximum power: 10.0W Maximum power voltage: 17.0V Current power limit: 0.6A Short-circuit current: 0.7A Open-circuit voltage: 21.8V
Circuit connections Fig. 1: Block diagram of solar powered pedestal lighting system Through a blocking diode, the output of the solar panel is linked to the battery (D1). Diode D1 keeps the panel from getting power in the wrong direction. During daytime, sunlight is directly converted into DC electricity by solar cells, hence the power flow is from the solar panel to the storage battery. At night, there isn't any sunlight, so the solar panel isn't making power, and there may be a flow of electricity in the opposite direction, from the battery to the solar panel. Diode D1 (1N5408) stops the current from the battery from going into the solar panel. This keeps the solar panel from getting hurt. Lead-acid batteries with a 6V, 4.5Ah rating are used here. The output of the solar panel is directly connected to the battery through a switch so that it can charge. The battery voltage sensing circuit, the light sensing circuit, and the logic circuit are all parts of the control unit for the pedestal lighting system.
Fig. 2: Circuit of solar powered pedestal lighting system The battery voltage sensing circuit keeps the battery from dying too quickly. The potential divider is what sets the voltage level of the battery. A comparator circuit built around op-amp IC LM358 compares the voltage of the potential divider with the voltage of the reference (IC1). Zener diode ZD1 sets the reference voltage at pin 2 of IC1 (A). When the battery voltage drops below the set voltage, the comparator output will go low. Potmeter VR1 is used to change the range of the battery cut-off. The logic circuit gets the signal from op-amp IC1 (A). Circuit operation The light-sensing circuit tells the power LED circuit to turn on at night and off during the day. Light is sensed by LDR1, which is a light-sensitive resistor. LDR1's resistance value changes based on how bright the light is. When the light is strong, the resistance is low, but when the light is weak, the resistance is high. In the potential divider circuit, LDR1 is hooked up. The voltage at pin 5 of IC1 is compared to the voltage controlled by LDR1. The potential divider at pin 6 of IC1 (B) makes the reference voltage, and potmeter VR2 is used to change it. The output of IC1 (B) is sent to IC2's logic circuit, which is built around its AND gate N1. The battery voltage sensing circuit and the light sensing circuit send their results to the logic circuit (two-input quad AND gate 74LS08).
When both of the AND gate's inputs are high, its output is high as well. The high output from pin 3 of the AND gate is sent to the relay-driver transistor T1 to turn on the relay, which controls the power supply to the LED circuit. When relay RL1 is turned on, the power-LED-driver circuit made up of IC3 and IC4 can work. The power-LED-driver is basically an adjustable voltage regulator circuit (LM317) that can drive up to 3W loads. Component ratings The wattage of an LED is 3W. It has a negative temperature coefficient, which means that when the temperature goes up, the current goes up more than the rated value. This can be changed by giving the LED a heat sink and changing the voltage. By changing the potmeters VR3 and VR4 in the regulator, the output of the regulator can be changed. So, the voltage that is sent to the LED can range from 3.0V to 3.4V. The battery should be charged at a rate of 10% of its ampere-hour rating. In this circuit, the battery is rated at 6V and 4.5Ah, and a 10W solar panel was chosen to meet the charging current needs.
You built Solar-Powered Pedestal Lighting System.
You followed the full workflow from understanding the mission to testing the finished project. That is a real engineering achievement - well done.
LED Illumination for Refrigerators
Ready to reuse what you learned in another project from the same track?
Start this project →