An Uninterruptible Power Supply (UPS) is a device that sits between a power supply and a device to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device. The UPS may be split into 4 main circuits: Input Power Factor Correction, [...]
Electronic system is designed to operate from a supply voltage, which is usually assumed to be constant. A voltage regulator provides this constant DC output voltage and contains circuitry that continuously holds the output voltage at the design value regardless of changes in load current or input voltage, assuming that the load current and input [...]
This calculator requires the use of Javascript enabled and capable browsers. A question that often comes up in projects using LEDs is “what resistor should I use with my LED?” This calculator helps determine that for you. Enter the data required for Supply Battery Voltage in the range of 3 to 24 volts, the Diode [...]
One of the things you may not think about when buying a new laptop is what will happen if you lose your laptop AC adapters. Sure this does not seem like something you would lose, but it is very easy to misplace. So it is always a good idea to know where to buy another [...]
When it comes to boating, few things are more frustrating than having a dead battery. Unlike car batteries, boat batteries experience a lot of down time, and they’re also relied on while the engine isn’t running. These factors can cause the power cells in a battery to die, unless you’re diligent about charging on a [...]
If you find building your own desktop power supply from a recycled PSU and a few parts from the local electronics store appealing, then grab some tools, pour yourself a cup of coffee (or personal preference) and let’s get started. The LED (light emitting diode) was also salvaged from an old PC. If you want [...]
This DC power supply circuit uses a LM338 adjustable 3 terminal regulator to supply a current of up to 5A over a variable output voltage of 2V to 25V DC. It will come in handy to power up many electronic circuits when you are assembling or building any electronic devices. The schematic and parts list [...]
