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Step-down transformers for this purpose are quite common. Check under "expats" on Google. I had several of these during my couple of European assignments. Smaller transformers are sold as razor adapt …

The power supply is most likely already protected on the primary side. Check the spec sheet. Since your secondary load is quite small compared to the capacity of the secondary, a best practice is to …

The adequacy of your UPS as a charger depends upon the type of battery for which the charger was designed. Most UPS's are made to charge gelled electrolyte batteries. If this is the case, you may find …

Edit: My original answer did not meet the design goal. This is a different approach. Count each under and over voltage event. When either count exceeds a threshold of say 3, trigger the alarm. Reduc …

Search for "high voltage buck converter IC" and you will find many chips from which to select. Analog Devices makes wide input range chips. Take a look at the LTC3895 and LTC7801 as examples. 4-140 …

A generator does not have a power factor. On an AC system, it is the complex impedance of the combined loads that determines the power factor.

The AGM battery that you linked to requires a special charger made for that type of battery. You cannot directly connect it to a 12 volt supply for charging. If you use an improper charging scheme, t …

D2 connected to the output of your IC2 comparator will create a non-linear output until the diode is in full conduction. Consider it a "feature" rather than a problem.

These are LEDs that have an integrated processor. So unlike a typical LED, controlling the voltage, instead of the current, to each LED is the primary design goal. As such, the issue of wire gauge bec …

The controller will not control the speed of a fan. You should connect a voltmeter instead and monitor the output voltage as a function of temperature.

The times when a conventional generator output voltage or frequency could become unstable is during startup, shutdown, and when it is running out of fuel and starving. Always unplug during these condi …

You didn't mention any current requirements for you device nor the overall voltage ranges for the balance of your circuit. You may wish to update your question with this information in order for the a …

Since your motors require 24 volts and the power supply only puts out 15 volts, these will not work well together. Obtain a 24 volt supply/driver with at least a 1.5 amp output.

The specifications to look at are the dBm transmit numbers. dBs are always an expression of a power ratio. In this case it is the logarithmic ratio the AP output power compared to a 1 mW transmitter. …

I power my Raspberry Pi via its USB connector. I simply use a portable USB phone charger battery bank inserted between the Pi and a wall adapter. The wall adapter normally charges the battery bank and …