Filter replacement on Dyson HP02

Note to self: to replace the filter on a Dyson HP02:

  1. Turn off and unplug the Dyson HP02 unit.
  2. Remove the filter. Turn the base of the machine to access the filter. Then press the two buttons on the sides of the machine to release the filter.
  3. Clean or replace the filter. You can wash the filter with cold water. Do not use detergent or soap. Rinse the filter under the water until it’s clean and then let it dry for at least 24 hours in a warm place. It’s important that it’s completely dry before you put it back into the machine. If the filter is too dirty or damaged, it might be best to replace it with a new one.
  4. Replace the filter. Once the filter is completely dry, place it back in the machine. It should click into place.
  5. Reset the filter indicator. Plug in and turn on your device. Hold down the ‘standby ON/OFF’ button for 6 seconds on the remote to reset the filter indicator.

Note: you hold down the button on the *remote* not on the unit itself.

Resetting a WASD Code keyboard

I have a CODE V3 104-Key Mechanical Keyboard with Cherry MX Green switches which I love. But unfortunately it has been my experience that they can be a bit finicky. I had to return one to WASD once because keys started producing “gibberish” if pressed the keys too hard. I know! Crazy!

Anyway I had a similar problem today. My Pause key, when pressed, would simultaneous ‘mute’ my audio *and* turn it either ‘up’ or ‘down’ (with a preference for ‘up’). Friggin weird. Anyway I was able to fix the issue by doing a keyboard reset.

To do a keyboard reset: unplug the keyboard, set SW4 to the “on” position, plug it back in. Wait until the solid green lights emit and then unplug, set SW4 back to the “off” position and then plug the keyboard back in and test. Easy peasy. :)

PDO Persistent Connection in PHP left broken if connected to dropped database

So you use PDO and specify PDO::ATTR_PERSISTENT => true. Then you drop your database. Then you open a new persistent connection and bang! Not working. The trick is to not use persistent connections to databases that may be dropped. And probably an ‘apache2ctl graceful’ after you drop a database being used by Apache…