Or open it up and take a look. Most UPS use standard sized sealed lead acid (SLA) batteries which are available from many sources. Look for a number...
1. is the only really safe way. The other methods might work but they have drawbacks, mostly to do with how clean their output voltage is. Inverters...
Also note that the capacitor normally has a rated usage time which may be as short as a few thousand hours. Remember that 1,000 hours is only 41 days...
That's correct except that a stepped attenuator usually has a constant 50 Ohm input impedance and 50 Ohm output impedance so you don't need the fixed...
The population is less than 10 per square Km here so everyone knows everyone else. There have only been three reported crimes within 10Km (~6 miles)...
The device is a dual-gate RF MOSFET not a BJT. It has a very high input impedance so it does not load the feedback path in the oscillator. The 47 Ohm...
Electronic design, TV production, photography, web site design
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Retired senior engineer for a test equipment company but still very busy!
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