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If you plug the power supply in first, it is going to be at (say) 9v, until you plug in the electronic device, and then its load will bring the supply down to somewhere around its rated 5v. Note in this case, you will always be starting at a higher voltage than the rated voltage since the power supply has already plateaued at the no-load voltage.
Here it may make a slight difference what order you plug them in. If you plug the power supply in first, it is going to be at (say) 9v, until you plug in the electronic device, and then its load will bring the supply down to somewhere around its rated 5v.
If you must follow a specific order, plug the charger into the AC power first, then plug the device to be charged into the charger. Why? Because I said so. That's about as good advice as you can get from anyone without specifying exact part numbers, and other specific information about the environment they are being used in.
recommended that you plug it into the wall last. I'm confident that anything out by doing it one way or the other. opposite direction. That is, that when you first plug it into the wall, in the device. But of course, I don't know... voltage properly. Good point. seen. I recently bought a replacement power supply for one of my
In practice it doesn't matter at all. By the way, laptop "chargers" are technically not chargers at all. The circuitry responsible for charging the battery is on the laptop motherboard and battery itself, while the power supply just outputs a constant voltage for the laptop to use.
If you connect the power supply to the laptop last, the output capacitors of the power supply will discharge to charge the input capacitors of the laptop, causing a large inrush current spike. However, no sensibly designed laptop will ever get damaged by this.
Calculate the desired current by dividing the capacity in mAh by 1000; If necessary, use a voltmeter to check the power supply''s output voltage; it should be within 1 …
"Positive first, then negative. When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Positive Or Negative First When Connecting A Battery: Solved! All car batteries have two …
When the power supply is first connected to the target device (laptop etc) and then connected to the mains you have a system at equilibrium with the y-capacitor''s midpoint …
Unexpected Danger: A peripheral concern not directly related to the power supply operation as a power supply BUT still relevant. Damage CAN be caused by connecting …
This feature allows the alternator to supply complete power to the battery when intense electrical demands are placed on it. Wire alternator directly to battery and be sure that all wires are …
The wiring order doesn''t matter on a de-energized circuit. You have to connect the ground wire first on a live circuit because you may energize the shell of your appliance if you accidentally …
My Smart Charger from batteryspace manual instructed to always do the wall plug, then the battery pack. When doing that, its logic circuit flashes all 6 LED''s first and then …
Removing the old energy source is not as simple as you think – take out the power supply. Instead, you need to follow the following procedure to ensure the most secure …
If you plug the power supply in first, it is going to be at (say) 9v, until you plug in the electronic device, and then its load will bring the supply down to somewhere around its …
1) Do not "just plug in and go" (like a normal power supply). 2) Plug the power supply into the wall for 10 minutes. 3) Unplug it, then find the right adapter plug for your laptop. …
The ONE situation where the recommendation is to connect the power first is when "jumping" a vehicle battery. You would connect the +12 (red) to each side FIRST, and …
The battery is first used to start the engine and it does this by providing electricity to a small electrical motor known as the starter motor. It also provides electricity to …
For a properly designed PSU it shouldn''t matter which connection you make first. For badly designed PSUs, both situation pose a risk: connecting the PSU to mains first …
It must be safest to plug or unplug leads into the laptop when no power is present. This makes it potentially less harmful to the laptop if you somehow manage to misalign or short conductors …
Do you connect the plug to the power supply first, then use the data cable to connect to the mobile phone, or connect the data cable to the phone first and then connect the …
Do you connect the plug to the power supply first, then use the data cable to connect to the mobile phone, or connect the data cable to the phone first and then connect the plug to the power supply? The answer is: always …
You keep the exposed metal grounded and switch the other side of the power supply. ... The battery terminal to be disconnected first depends on the terminal that is earthed …
Understanding 12-Volt Batteries and Power Supplies. Before diving into the specifics of charging, it''s essential to understand what a 12-volt battery and a power supply …
In some forums, some peoples says this can damage the laptop because i need to plug the power cord in the laptop first and then connect it in the AC wall outlet after. Some …
Removing the old energy source is not as simple as you think – take out the power supply. Instead, you need to follow the following procedure to ensure the most secure system operation. First, you need to disconnect the …
The Arduino usually gets its power from the USB port on a computer or an external power supply such as a battery pack or a wall wart. ... some breadboards have binding posts that allow you to connect external power sources. The first …
Before charging a 12V battery with a power supply, it is essential to identify the battery type. Two common types of 12V batteries are lead-acid and lithium-ion batteries. Lead …