Monthly Archives: August 2015

Redoing the power distribution of my scope

After many years of use, I’ve decided that it’s time to redo the power distribution of my telescope.  The power box project that I did was great at the time, however over the years there a couple of things about that project that didn’t really work out too well.  Here’s the problems that I had with the first version.

Replacing my laptop.

The laptop that I have been using with my scope is over 10 years old.  This isn’t a problem in itself, but there are a few things that are worth noting.


  • Sony Vaio VGN-A115ZIt’s power hungry.  The internal battery is worn out, and only lasted about an hour in real use anyway.
  • It’s very picky about the input power, so can’t be run from a 12v DC-DC converter, unless it’s plugged into a car with a running engine (too low input voltage otherwise)
  • The 230v power supply doesn’t work with an inverter. Lucky I have a generic that does work.
  • Inverters are power hungry.
  • It’s just plain awkward to use the laptop in the dark.
  • The laptop has suffered from a HDD failure, so I replaced the drive.  If the laptop needs any work again, it’s not going to be so easy to repair it.