![]() For charging stations with multiple ports, I always selected the port with the highest power output while also not having multiple devices connected.Īs for the devices themselves, I selected an Apple iPhone 13, a Samsung Galaxy S22 Ultra, a Nintendo Switch (a launch model from 2017), a 2021 Dell XPS 13 and a 16-inch M1 Max MacBook Pro. Generally, charging is slower between zero and 20 percent before speeds ramp up until the battery hits 80 percent, at which point things slow down again to protect and preserve the health and longevity of the power cell. If that wasn’t an option, I used certified 100-watt USB-C cables made by Anker, Apple and others.īecause the charging rate for devices varies depending on how much juice you have, I wanted to measure how well each adapter was able to match each gadget’s optimal charging speed. Each adapter was plugged directly into a standard 120-volt outlet (without the use of a power strip or any extension cords), and when possible I used the cable that either came included with the battery charger or one made by the same manufacturer as the device. ![]() I drained each device to 10 percent battery, plugged in a power brick and then recorded the amount of charge added every 10 minutes for an hour. The methodology for my experiment is intended to be as straightforward as possible. So once our battery is dead, our project will be too.įor this tutorial, we will use a LM7805 (a linear voltage regulator) for our power supply.Best 100-watt and up charger Razer USB-C 130W GaN Charger This power supply will not be able to convert from lower volts to 5. So if we want 5 volts, we need at least 7 volts to maintain the steady 5 volts that we want. The only caveat of a standard voltage regulator is that the main supply has to be slightly higher then what we want to achieve. It's job is to maintain a steady 5 volts regardless of what the our battery is doing. A regulator is a device that will convert the unregulated voltage to a stable 5 volts that we need to power our project. For proper operation, we need to find a way to convert the voltage of our main supply (battery or wall adapter) down to 5 volts. ![]() Most electronics need a certain amount of voltage and current to function.įor the sake of this tutorial, lets make that about 5 volts and let's save the current for later. The pressure of the water at the end of the hose is the voltage, and the amount of water going through the hose is the current. The best way to think of this would be to imagine a hose with water running through it. It provides the circuit with a certain voltage and current. A power supply is responsible for providing a circuit with all the power it will need during normal operation. We will start with a battery, and work our way up to a wall adapter. It’s pretty simple really first, I want to explain what a power supply does, and then I will show you how to build one. With all these different options, how does one power their electronics project? Let us show you! Some are battery powered, and others are solar. Some projects use the USB port on your computer others use a cheap wall adapter. The first part of any electronics project, is a power supply.
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