What Is the Difference Between Solar Street Lamps and Commercial Led Solar Lights?

When using paralleled MOSFETS in the output stage as you are, your should install small ballast resistors (0.2 Ohm) on each source terminal to ground. This will ensure that the MOSFETs share the current equally. ...The way this works is if one MOSFET starts taking more of the current, this will lead to a lowering of the Vgs of that MOSFET which turns the MOSFET off slightly and re-balances the current between MOSFETs.

Also, its best to give each MOSFET its own independent gate resistor, this can eliminate any potential oscillations (at least thats recommended in amplifier circuits with paralleled output transistors)

The circuit presented here is sized to switch 100W at a minimum pulse width matching 250Hz. But actually it's currently only being asked to switch around 10-20W. The load is an array of LEDs. Q1 and Q2 also have small heat sinks on them for extra measure.

The input circuit actually includes one more BC557 (making the input active-low) and is driven by an Atmega328P PWM output @ 3.3V.

There are two of these circuits (two channels) in a single enclosure, driving remote LED lights.

The lights are part of a solar-powered lighting system, and the lights are often turned on during the day to regulate the charging voltage to the battery.

When this circuit works (which is normally the case) it works very well.

The problem is that occasionally the LEDs are jamming on, eventually draining the battery completely flat.

I'm pretty certain the problem is in this circuit (rather than code), because:

the condition appears physically very fragile. Just opening the (normally sealed) enclosure seems to be enough to have the LEDs turn off - as does picking it up and shaking it! Makes it hard to perform any circuit diagnostics!

But I can tell (wirelessly) that the Atmega has not rebooted.

And because both channels have the same fault, it makes me think it's a design flaw and not a component fault or bad connection.

Also, sticking my fingers all over the circuit (my quick test for high impedance circuitry) doesn't cause the LEDs to react.

And Q1 and Q2 don't appear to be very hot when in this condition, at least not after being in this condition for a fair amount of time - I've never caught it in the act...

On reflection, R3 could also be smaller. But I find it hard to believe that's the problem either.

One possible mistake is the lack of a snubbing diode on the load, since the wire lengths are quite long. But if that was the problem, would I expect to see it turning full-on?

Another mistake could be that I've undersized R1R2 for suppressing some kind of oscillation?

Another mistake could be not allowing for some kind of thermal event's effect on Q1 and Q2? Possibly exacerbated by being out in the sun?

I'm sure someone here can tell me what's going on :)

·OTHER ANSWER:

The circuit presented here is sized to switch 100W at a minimum pulse width matching 250Hz. But actually it's currently only being asked to switch around 10-20W. The load is an array of LEDs. Q1 and Q2 also have small heat sinks on them for extra measure.

The input circuit actually includes one more BC557 (making the input active-low) and is driven by an Atmega328P PWM output @ 3.3V.

There are two of these circuits (two channels) in a single enclosure, driving remote LED lights.

The lights are part of a solar-powered lighting system, and the lights are often turned on during the day to regulate the charging voltage to the battery.

When this circuit works (which is normally the case) it works very well.

The problem is that occasionally the LEDs are jamming on, eventually draining the battery completely flat.

I'm pretty certain the problem is in this circuit (rather than code), because:

the condition appears physically very fragile. Just opening the (normally sealed) enclosure seems to be enough to have the LEDs turn off - as does picking it up and shaking it! Makes it hard to perform any circuit diagnostics!

But I can tell (wirelessly) that the Atmega has not rebooted.

And because both channels have the same fault, it makes me think it's a design flaw and not a component fault or bad connection.

Also, sticking my fingers all over the circuit (my quick test for high impedance circuitry) doesn't cause the LEDs to react.

And Q1 and Q2 don't appear to be very hot when in this condition, at least not after being in this condition for a fair amount of time - I've never caught it in the act...

On reflection, R3 could also be smaller. But I find it hard to believe that's the problem either.

One possible mistake is the lack of a snubbing diode on the load, since the wire lengths are quite long. But if that was the problem, would I expect to see it turning full-on?

Another mistake could be that I've undersized R1R2 for suppressing some kind of oscillation?

Another mistake could be not allowing for some kind of thermal event's effect on Q1 and Q2? Possibly exacerbated by being out in the sun?

I'm sure someone here can tell me what's going on :)

What Is the Difference Between Solar Street Lamps and Commercial Led Solar Lights? 1

get in touch with us
recommended articles
News
How to Choose Professional Outdoor Solar Lights?
The introduction of outdoor solar lightsAn outdoor solar light is a form of solar energy that uses sunlight to produce electricity. This type of light can be used to provide heat for lighting purposes, such as in street lamps. It can also be used to heat buildings and reduce heating costs. An outdoor solar light can also be used to produce electricity by supplying heat to the air and water. Outdoor solar lights can also be used to create an atmosphere around a house or other object, such as a wall. It can also be used to create a ground effect around a house, which can help reduce the need for electrical energy.Most outdoor solar lights are powered by solar power. Most outdoor solar lights use batteries and have built-in battery bank that provides up to 50% of the energy required by the sun. They can be easily turned on and off in a very short time. The best outdoor solar lights are designed to provide enough power to make your home run longer and get more light into your room. You can choose from several styles of outdoor solar lights and you can save money on electricity bills by buying a different style of outdoor solar lights. If you want to save money on electricity bills then outdoor solar lights are the way to go.With so many products out there, the most important thing to consider is what kind of lighting you want. Some people may not know that there are many types of outdoor solar lights and some people do not know what type of outdoor solar lights to choose from. A good way to find out is to go online and check out some reviews online. It is best to make sure that you read all the reviews before you decide on the type of outdoor solar lights you want to use. Make sure that you have the right kind of outdoor solar lights and then get some recommendations from friends and family.The manufacturing process of outdoor solar lightsMost outdoor solar lights can be purchased in India and it is possible to get a better price than you would think. However, there are some things that you should do before you start using outdoor solar lights. They can help you make sure that you get the best deal possible on your purchase. Outdoor solar lights are very lightweight and they don't need any special technology to light up your property. You can also choose to have them installed in your garden or even outside your house.Led solar lights are used to create heat and light up the air and water in the surrounding environment. When they are installed correctly, they will have a high efficiency of about 2,000 W. This is because they use a large amount of energy. A small amount of energy can be used to make lighting lamps that work much more efficiently. The only requirement is that the sun's rays be blocked by the poles, so that they don't pass through the poles and into the wind. Solar lights also provide some form of power to a household or utility.In order to produce lights that will last a long time, it is necessary to use an appropriate battery and proper tools. A good battery can last up to 2 years and should be able to handle heavy usage. However, if you are using a bad battery then it is very important to make sure that you have enough batteries for your needs. Outdoor solar lights are designed to work with any type of light and they need to be properly maintained. It is very important to check that the battery is not leaking or short circuiting.All outdoor solar lights are assembled in the same factory and installed in a small area. All outdoor solar lights have been designed to be placed in place on the ground, which means that they can be attached to the ceiling or other places on the house. This is one of the reasons why outdoor solar lights are so popular. These outdoor solar lights are generally cheaper than ordinary solar lights and also provide much better energy efficiency than regular solar lights. If you want to install outdoor solar lights then there are some things you can do.The advantages of outdoor solar lightsThere are many types of solar lights, from direct solar to LED solar lights. It is always a good idea to make sure that you select the best one for your needs. They can be either large or small, so make sure that you choose the best one for your needs. They can be small and lightweight, so make sure that you use them correctly. Also make sure that you have enough space for your garden or patio so that you can situate your garden or patio.If you want to reduce your heating bills and install solar lights in your home then it is important to choose the right one for your needs. Most of the time, people are unaware of the benefits of outdoor solar lights and if you have not chosen the right one then it is best to get some advice from experts and do some research on the internet. Outdoor solar lights are very much appreciated by people because they have many uses. This article will show you some of the most common ways to use outdoor solar lights.Most of the world's cities are still small and few people are aware of the technology that is being used in our everyday lives. The problems that exist in many countries today are difficult to solve. People have long since stopped using them because of health concerns. Some people even use them as lighting lamps to decorate their homes. These light bulbs have some disadvantages, but they can be adjusted to fit your home.They have become more and more popular in the last few years.There are several types of outdoor solar lights that you can choose from. These are mainly made of glass, which is used in many different lighting applications. The reason why they are called outdoor solar lights is because they use an integrated circuit and thus have low power consumption. This makes them ideal for people who want to enjoy their outdoor activities without having to spend a lot of money on electricity. They also make it possible to save a lot of money by buying the right type of solar lights. Outdoor solar lights can also help you to take care of your home.How to use outdoor solar lights?The main purpose of outdoor solar lights is to keep the temperature in your garden safe and dry. It is an energy efficient solution that can save you money on electricity bills and it also helps to protect your home from heat stress. You can choose from three different types of solar lights. They are called solar street lights and solar post lights. These are usually used by homeowners who want to make their home look neat and clean. Solar post lights are small and lightweight and they can be easily attached to any light or power source.Some of the most popular outdoor solar lights that we have in the market are those that are inexpensive and simple to install. These solar lights can be found at your local hardware store, yard or garage and they can also be found at any other location in the world. You can find these solar lights at many places around the world. The best way to use them is to get some local knowledge about them and learn about their uses. If you have an interest in learning about these solar lights then get some training on them.A solar light is an optical device that uses a radiation absorbing material to make it appear as if it is attached to the surface of the object. It can be used to create a street light, turn off lights in an emergency or just illuminate a person's face. They can also be used to control lighting and have security systems installed to protect people from power surges. Outdoor solar lights can also be used to decorate buildings and vehicles, so they can provide privacy for people who may have some personal needs.Most outdoor solar lights can be set on a deck or patio, but they are also pretty powerful. A small group of people with some serious skill in outdoor solar lights will need to get out of their driveway and into the sunshine. This means they need to have enough power to go about their daily lives without needing to recharge their batteries. It is not always easy to find the right size for their needs and then find the right spot to put them in. They will need to know how to get into the house, so they need to have some safety measures in place.
Advantages of Selecting Outdoor Solar Lights
5 Reasons a Outdoor Solar Lights Is Good for You
How to Choose Outdoor Solar Lights
Wholesale Solar Lights- Free Manual Guide
Why You Should Have a Outdoor Solar Lights?
Outdoor Solar Lights Quality Affected by What Factors
What You Need to Know About Outdoor Solar Lights
The Benefits of Using the Right Wholesale Solar Lights
A Brief History of Best Street Solar Lights
related searches
Where Can I Find Black Lights, Solar Lights, and Stuff Like That?
Buy Solar Lights to Build Your Personal House Safe and Secure
Get the Best Range of Outdoor Solar Lights and Bulbs in India
How to Make Your Own Solar Lights From Scratch
What to Think When Selecting Solar Lights
Lights for My Yard. I Nneed Instruction(easy) on How to Landscape My Yard.?
Why You Need to Buy Solar Lights
How Can I Brighten Dim Solar Lights?
Smart Development of LED Streetlights in the Future

Contact Us

Copyright2021@KemecoLighting

Service Support

kemeco@kmc-ltd.com

 Copyright © 2021 Kemeco |Sitemap