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Steven Ellet
- 85
- 3
I would like to know what will give me a constant voltage no matter what the input is (within reason of course) Example: input 9 volts, output 1.5 volts; input 6 volts, output 1.5 volts; input 1 volt, output <1.5 volts.
Steven Ellet said:I would like to know what will give me a constant voltage no matter what the input is (within reason of course) Example: input 9 volts, output 1.5 volts; input 6 volts, output 1.5 volts; input 1 volt, output <1.5 volts.
Steven Ellet said:On a related note, would dimmer switch technology (https://en.wikipedia.org/wiki/Dimmer) do a simalar (not identical) job if hard wired?
P.S. would a dimmer work on dc power?
Sorry for the long delay, I have kind of been all over the place. As far as I could tell that requires a "check voltage" and that is a little inconvenient. For example, if I have a car battery and want to get only 1.5v from it, I would effectively need a 1.5 voltage battery to make it work.berkeman said:Welcome back!
No, a dimmer will not do what you have asked for. Did you read the voltage regulator links? Why won't that work for you?
as others have said, using a 1.5V voltage regulator will be the best way to get 1.5V from a higher voltage battery. Why do you think a regulator will not work?Steven Ellet said:Sorry for the long delay, I have kind of been all over the place. As far as I could tell that requires a "check voltage" and that is a little inconvenient. For example, if I have a car battery and want to get only 1.5v from it, I would effectively need a 1.5 voltage battery to make it work.
Steven Ellet said:Sorry for the long delay, I have kind of been all over the place. As far as I could tell that requires a "check voltage" and that is a little inconvenient. For example, if I have a car battery and want to get only 1.5v from it, I would effectively need a 1.5 voltage battery to make it work.
I have a camera that requires 3v (2 AA/1.5). unfortunately once the battery strength drop below 2.5v, the camera dies, I found a way to input ac and output a constant 3v, I want to do this with a battery(s) to make it more mobile.berkeman said:What is your application?
No problem. Get a 12V battery, a voltage regulator that runs off of 12V and outputs 3v. Done.Steven Ellet said:I have a camera that requires 3v (2 AA/1.5). unfortunately once the battery strength drop below 2.5v, the camera dies, I found a way to input ac and output a constant 3v, I want to do this with a battery(s) to make it more mobile.
I'll try that and get back to you.phinds said:No problem. Get a 12V battery, a voltage regulator that runs off of 12V and outputs 3v. Done.
phinds said:No problem. Get a 12V battery, a voltage regulator that runs off of 12V and outputs 3v. Done.
Jeff Rosenbury said:I guess the decision on whether to go with a 3V battery pack or a 12V battery with a buck switcher comes down to how much battery you want to lug around. A 12V car battery provides lots of power, but is heavy. A bunch of D cells is lighter and easy to replace. There are lots of other options, but those are the big two. It depends on how long you want the batteries to last.
Don't_ban_me! said:use a zener diode if you want the simplest method.
A three terminal voltage regulator is simple, but inefficient. I would not recommend it for battery applications. A buck mode switcher or simply a couple of D cells seems better.meBigGuy said:Uhhhh ---- that's not a very practical suggestion. I suggest you try to design a zener diode solution that allows for 50ma steady state currents and 1A transients and maintains 3 or 3.3V +- 10%. Don't forget to deal with power dissipation in the zener and series resistor, and the change in zener voltage with varying current.
The simplest is a voltage regulator, which is designed to deal with a wide range of output currents.
A resistor is an electronic component that is used to limit the flow of electrical current in a circuit. It works by reducing the voltage that passes through it, which in turn creates a constant voltage output.
The resistance of a resistor is measured in Ohms (Ω) and can be calculated using Ohm's Law (R = V/I). To determine the correct resistor for your circuit, you will need to know the desired voltage and current, and select a resistor with a resistance value that will give you the desired voltage output.
Yes, you can use multiple resistors in series or parallel to achieve a specific voltage output. When using resistors in series, the total resistance will be equal to the sum of each individual resistance. When using resistors in parallel, the total resistance will be less than the smallest individual resistance.
If you use a resistor with too low of a resistance, it can cause an overload in your circuit and potentially damage your components. If you use a resistor with too high of a resistance, it may not provide enough voltage reduction and your circuit may not function properly.
Yes, in addition to the resistance value, other factors such as power rating, tolerance, and temperature coefficient should also be taken into consideration when choosing a resistor for a specific voltage output. It is important to select a resistor that can handle the power and temperature requirements of your circuit to ensure its stability and longevity.