1/15/2024 0 Comments Aaa battery voltage range![]() That is, they are interchangeable if you can make them fit. Pro tip: AAA, AA, C and D cell batteries all have the same voltage rating and are interchangeable. In a later step, I will show you how to verify the current draw of your device. If your power supply says 5 Volts and 1.5 amps, it can power a 5 Volt circuit and it won’t burn up until the device pulls more than 1.5 amps from the power supply. ![]() ![]() This project uses this relationship to replace Voltage, V supplied by a battery with voltage supplied by a DC power supply – nothing else is changed.Īnother way to think about this is that voltage is how much the power supply pushes and current is how much the device pulls the energy. If I replace my batteries with a power supply of equal voltage, then the current in the system also stays the same. Ohm’s law tells us that Voltage in an electric circuit is equal to the product of the current flowing through the circuit and the resistance of the circuit.įor a given circuit, in my case, the toy, the resistance R is a constant. Ohm’s law is a formula in electronics that relates the voltage (V, volt), current (I, amp) and resistance (R, ohm) of a circuit. They use a AC to DC power supply to allow us to charge the device by plugging it into the wall. Many common devices that have batteries (laptops, smart phones, etc) only accept DC power. An AC to DC power supply can change AC wall power to DC power. Batteries are direct current ‘DC’ and only push the current in one direction. Wall outlet power is generally alternating current, or ‘AC’. Car, but in a pinch, you can use it on the remote control for your TV. This idea is not well suited to something like an R.C. This toy just sits on the desk, so it’s a good candidate to modify to accept a DC power supply instead of batteries. I don’t like buying or replacing batteries. The problem is the toy is battery operated only and there’s no automatic shutoff so when kids use it like a night-light it’s dead in a few days. Most recently my kids got an awesome night-time toy that projects stars, the moon, galaxies, etc on the ceiling. Sometimes however, there are certain devices that I wish came with a plug. In general, batteries make my life a little more mobile and less tangled. Will it be sitting on a desk or near the bathtub? Would your kids put it in the bathtub? Will it be a shocking experience for them if they do? There will be more on this in a later step.īefore replacing batteries with a power supply, consider where the device or toy is used. Check the polarity of your batteries and power supply to ensure they match. If you wire your circuit backwards, the current will attempt to flow backwards through your device and could damage it. At all times, practice safety.īatteries/power supplies have specific direction/polarity (positive or negative) that the moves the current along. 1amp is potentially lethal if it ‘bites’ you in the wrong spot. So, while a 5 Volt 1 amp power supply may be reasonably safe to work with, a 100 volt. Voltage does not kill, current kills, but voltage is required to push the current along. if you have concerns about doing this on your own particular project, ask for help. I can give some guidance on how to choose equipment safe for your application, but it doesn’t mean it is safe for your person if you get in the middle of your electric circuit. When it comes to safety, it pays to double check your work and error on the side of caution. If you have questions, watch the video, it has extra detail as well.
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