Sometimes you want to know how many volts your train transformer is feeding your trains, in order to avoid damaging the motors. And it’s also helpful to know how many amps you’re pulling from your transformer, so you don’t damage the transformer.
Measuring the voltage and amperage of your train transformer’s output
http://dfarq.homeip.net/2012/04/measuring-the-voltage-and-amperage-of-your-train-transformers-output/
What you need to know to safely replace or substitute AC adapters
I’ve written about replacing dead or broken AC adapters without blowing stuff up before, and it’s been popular, but less concise than it could be. This is important. Getting it wrong can damage your equipment, the adapter, or both. The damage can be immediate, or it can appear over time. The specifications for your AC [...]
http://dfarq.homeip.net/2010/11/what-you-need-to-know-to-safely-replace-or-substitute-ac-adapters/
The 2wire 1701HG and its dodgy power supply
I picked up a 2wire 1701HG modem/router/WAP this weekend cheap. The power supply was missing. Google indicates the factory power supply is really dodgy. A replacement costs anywhere from $13 to $25, unless you go to your local Gamestop or some other store that sells video games.
http://dfarq.homeip.net/2009/06/the-2wire-1701hg-and-its-dodgy-power-supply/
Reviving a laptop
My Micron Transport LT (a rebranded Samsung Sens Pro 680) died on Friday. I wasn’t a happy camper. Just ask my wife.
But it’s working again today, and I learned something along the way.
http://dfarq.homeip.net/2006/02/reviving-a-laptop-2/
Testing a blown AC adapter
All too often, people plug the wrong AC adapter into an electronic device. People just plug in the first adapter that fits, and usually when they do this, if the equipment wasn’t blown before, it is now.
http://dfarq.homeip.net/2002/05/testing-a-blown-ac-adapter/