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5

It will not be possible for you to PWM dim your LED with that LED driver (power supply). That is a constant current driver with under/over-voltage protection. It delivers a specific amount of current (1.5A) and varies the voltage to allow that to happen. If the voltage rises too high or falls too low then there must be a fault, so it shuts the power off. ...


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Voltage Drop Well, if you put 5V into your barrel jack, your UNO's onboard 5V regulator is going to drop that down to 3.5V or so. You must have more than 5V into the regulator to get 5V out of it. This is referred to as the regulator's "drop out" voltage. The specs for an UNO say to power it from at least 7V for that reason. As an experiment you ...


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If you buy a 30V current-limiting power supply set to limit the current to 1.5A, you should be able to use it to power your LED light through a high power logic level MOSFET. You could control the MOSFET with a PWM signal from an Arduino and use that to vary the brightness of your light. With a little googling I found an adjustable power supply with an ...


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Besides connecting all the grounds, a "good idea" whenever working with solenoids or magnetic (as opposed to solid state) relays is to add protection against inductive kickback, which can create really high voltages (hundreds of volts) when the current through an inductor changes suddenly. (The voltage is the product of the inductance and the rate-...


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Figuring out your current needs is simply a matter of adding everything up. If you have 5 2 amp motors, you'll need 5 x 2, or 10 amps just to drive the motors. You should probably have at least 20% extra capacity, so I'd suggest having a 12V power supply that can put out at least 12A. 15A would be better. The stiffer your power supply the less it will "...


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If u use the VIN pin of arduino, You shouldn't have a problem , as arduino selects it required voltage automatically, it's voltage regulator senses the voltage from USB and External source, if the power of the external source is higher than usb, the the power is bypassed to the External power. But don't know if you are using the 5 volt pin to turn on the ...


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I have a 2.4A USB power supply. Is that enough? Not by a long way, no. NEMA 17 motors are typically 12V, not 5V, so a USB power supply is not even close. You will need a decent 12V power supply with a lot of current. My 3D printer has 3 NEMA 17 motors and uses a 200W 12V power supply. Most of that goes to the motors with only a comparatively small ...


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Consider using a 12V sealed cell lead-acid battery. Those are fairly cheap and easy to find in a wide variety of capacities, and chargers are also simple and easy to find. A car battery would power your system approximately forever, since they have such huge capacity. Figuring out how long a given type of battery will last is a simple question of math. ...


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