Hi, Runes has a good idea there, but don't use the same two pins you would use for a speaker. That's pin 1 to the speaker and pin 4 to +5. That usually shuts your PSU down!
Use pin 1 as signal and pin 3 ground (return). Works OK that way and should drive most any amplifier.
Good Luck, Jim
Hi Mon, There seems to be a misconception in the description of your 1. The first type of UPS runs the AC straight to the output connectors and switches the converter on only when the AC goes out. The second type runs the converter at all times from the same supply that is charging the battery...
Hi, The Lord is correct as usual. Compare the connectors on a cable. Held the same way a straight thru cables wire colors are lined up the same. Crossed cable wires do not line up the same. Shades of Serial communication of the past. I solved that one with a switch and two leds. When both leds...
Hi, I think Dawn is correct about the "Black thing". It reminds me aslo of a "CUP CORE" a torodial wannabe. Cheaper and easier to wind than a toroid. Switching Power Supplies make use of Torodial transformers for efficiency.
Jim
Hi, If the charger Voltage measured across the battery is same polarity as the battery and about 13.5 to 14.5 volts then the charger is working. If your multimeter can handle up to about 10 amps then it might be worth it to check the charge current. I think he has already established that the...
Hi, It's not so much that the Case Speaker is small and of poor quality, the amplifier is one transistor sending a square wave to the speaker. Only good enough to make a noise. It can be programed to make different beeps, but it's not worth the trouble.
Jim
Hi Nobb, Don't really understand. The computer etc. does not run off the battery when the UPS is plugged in and the AC Power is good. Sounds like it's always running on the battery and the charger can not keep up. UPSs usually use a relay, usuallysolid state, to switch from AC to Batt operation...
Hi, The Lord is correct as usual. The file is Autorun.Inf. It contains an entry "Open= 'the executable to run'". Can contain a lot of other useful commands. For example "Icon='The Icon to show in the Directory'". Search for Autorun for more details.
Good Luck, Jim
Hi, Don't freeze any rechargable battery. Just put them in the refrigerator where it's about 40 degrees F. Self discharge increases with temperature. Keeping them cool reduces the self discharge. They still go down only not quite as fast. Works with any battery.
Good Luck, Jim
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