How to measure ac voltage Turn the dial to ṽ. Some digital multimeters (DMMs) also include m ṽ . First insert the black lead into the COM jack. Next insert the red lead into the VΩ jack. Connect the test … Continue reading →

Any length or size of wires will have some resistance, and running a current through this dc resistance will cause the voltage to drop. As the length of the cable increases, so does its resistance and reactance increase in proportion. … Continue reading →

’12v’ is often ‘automotive’ devices- in which case they are very tolerant of fairly wide voltage swings (basically from 10.8v to 14.4v is commonly seen in an automobile) so they will happily take a 13v supply without issue, as long … Continue reading →

What pins turn on a power supply? To start up a stand alone PSU for either testing purposes or as a bench power supply, we need to short together pin 14 – Green (Power-ON) to one of the common black … Continue reading →

100 – 240V. Samsung TVs sold in India are designed to work with PAL broadcasting signals and an input voltage of AC 100 – 240V 50/60Hz. Are Samsung Smart TVs dual voltage? Samsung Multisystem TVs. These TVs are all Dual … Continue reading →

How to measure dc voltage with a digital multimeter Then insert the red probes into the V Ω jack. When finished, remove the probes in reverse order: red first, then black. Connect the test probes to the circuit: black to … Continue reading →

One of the easiest ways to charge your laptop is with a power bank. A power bank is basically a portable battery for your laptop. All you’ve got to do is connect the power bank to your laptop. The best … Continue reading →

Yes you can and watch an explosion take place too! Theoretically, you can charge your car battery with a 12V power supply.For a car battery to be good enough for use, it will need to read at least 13.8V. So … Continue reading →

It’s possible to step 12 volts down to 6 volts by incorporating a pair of 10,000-ohm resistors into the circuit. Cut two lengths of wire, and strip each wire of 1/2 inch of insulation at each end. Attach one end … Continue reading →

From looking at its specs it doesn’t have a waterproof rating so it’s not, I would avoid getting it wet and then especially using it whilst it’s wet. Is the MagSafe battery pack waterproof? A) The MagSafe Battery Pack is … Continue reading →

USB Power Delivery USB Type-C connector is commonly used in Power Delivery. PD requires high voltage and high current (5V, 9V, 15V or 20V, 1A-5A) to charge devices. As PD’s voltages and currents are higher than QC, it can support … Continue reading →

A charger powers your device as fast as your cable allows. All USB-C cables must be able to carry a minimum of 3A current (at 20V, 60W). But for high-power 20V/5A (100W) charging, you need a 5A-rated USB-C to USB-C … Continue reading →

2 Answers. All Macbooks (save the new Retina Macbook which uses a USB-C charging port) use nominally 20V power supplies (the magsafe chargers, 20V will be marked on the bottom of them). In actuality the peak output voltage is under … Continue reading →

Use theater mode on Apple Watch Theater mode prevents the Apple Watch display from turning on when you raise your wrist, so it stays dark. It also turns on silent mode and makes your Walkie-Talkie status unavailable, but you still … Continue reading →

The thin wire connects to the MagSafe port on the MacBook Pro. To add to what others have said, the three prong plug allows the charger to be grounded, the two prong plug that can plug into the three prong … Continue reading →