ANDREW PENG » Cool! http://andrewpeng.net Unattended children will be given an espresso and a free puppy Fri, 18 May 2012 18:53:03 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Headphone Amp Set in Clear Acrylic http://andrewpeng.net/posts/2012/04/231603-headphone-amp-set-in-clear-acrylic.html http://andrewpeng.net/posts/2012/04/231603-headphone-amp-set-in-clear-acrylic.html#comments Mon, 23 Apr 2012 14:58:26 +0000 andrew http://andrewpeng.net/?p=1603 I need to get a headphone amp for my Sennheiser HD280 Pros – maybe this will be my next project. A headphone amplifier assembled “dead bug” style, then set in clear acrylic. Yes. I want one.

Electronic engineers have been encapsulating or potting electronics in resin’s for decades usually for vibration dampening or moisture control its just I decided to make it look presentable :)

Source: Rupert Hirst / Runaway Brainz

]]> http://andrewpeng.net/posts/2012/04/231603-headphone-amp-set-in-clear-acrylic.html/feed 0 Discovery atop 747 http://andrewpeng.net/posts/2012/04/191594-discovery-atop-747.html http://andrewpeng.net/posts/2012/04/191594-discovery-atop-747.html#comments Thu, 19 Apr 2012 15:07:12 +0000 andrew http://andrewpeng.net/?p=1594

Space Shuttle Discovery mated with SCA NASA 905 chase flight from KSC – VAB in the background.

Source: NASA / Sheri Dunnette Locke

]]> http://andrewpeng.net/posts/2012/04/191594-discovery-atop-747.html/feed 0 Space Shuttle Discovery http://andrewpeng.net/posts/2012/04/171588-space-shuttle-discovery.html http://andrewpeng.net/posts/2012/04/171588-space-shuttle-discovery.html#comments Tue, 17 Apr 2012 15:44:09 +0000 andrew http://andrewpeng.net/?p=1588 I’m still upset that Houston didn’t get one. Thanks for the words, Engadget:

]]> http://andrewpeng.net/posts/2012/04/171588-space-shuttle-discovery.html/feed 0 Nice view up there http://andrewpeng.net/posts/2011/11/151378-nice-view-up-there.html http://andrewpeng.net/posts/2011/11/151378-nice-view-up-there.html#comments Tue, 15 Nov 2011 13:37:23 +0000 andrew http://andrewpeng.net/?p=1378 Update: Edited the embed because the original video was removed.

http://www.youtube.com/watch?v=Ip2ZGND1I9Q

 

When commercial space tourism becomes attainable (but not necessarily affordable), I’m going to have to see this for myself.

]]> http://andrewpeng.net/posts/2011/11/151378-nice-view-up-there.html/feed 0 If you put an airplane on a treadmill… http://andrewpeng.net/posts/2011/09/161353-if-you-put-an-airplane-on-a-treadmill.html http://andrewpeng.net/posts/2011/09/161353-if-you-put-an-airplane-on-a-treadmill.html#comments Fri, 16 Sep 2011 14:36:42 +0000 andrew http://andrewpeng.net/?p=1353 Estimate the mass of an Airbus A320 at about 170,000lb, start the accelerometer based dyno tool on the iPod touch, and wait for takeoff!

For the record, the estimation based on a 170000lb aircraft was 28596 hp

60′: 4.71 sec@18.5 MPH

1/8 mi: 13.89 sec@ 66.5 MPH

1/4 mi: 19.40 sec@94.2 MPH

A rather poor 1/4 mile time that most modern passenger sedans can outrun but keep in mind that while Mom’s Ford will stop accelerating at around 100MPH, this Airbus will continue accelerating until well past 500MPH.

]]> http://andrewpeng.net/posts/2011/09/161353-if-you-put-an-airplane-on-a-treadmill.html/feed 1 A Legacy Concluded http://andrewpeng.net/posts/2011/07/121305-a-legacy-concluded.html http://andrewpeng.net/posts/2011/07/121305-a-legacy-concluded.html#comments Tue, 12 Jul 2011 05:09:35 +0000 andrew http://andrewpeng.net/?p=1305

[Source: arockalypse on Reddit / Flickr]

]]> http://andrewpeng.net/posts/2011/07/121305-a-legacy-concluded.html/feed 0 Be nice to your servers http://andrewpeng.net/posts/2011/07/011294-be-nice-to-your-servers.html http://andrewpeng.net/posts/2011/07/011294-be-nice-to-your-servers.html#comments Fri, 01 Jul 2011 14:00:16 +0000 andrew http://andrewpeng.net/?p=1294 http://www.youtube.com/watch?v=tDacjrSCeq4

Yelling at your servers can measurably negatively affect their performance. No joke. Make sure to treat your servers with respect, and keep it quiet in the datacenter!

Perhaps there is a “brown note” for disks (“rust note”?) – some harmonic that destroys their performance; although based on what we think is happening (disk heads being thrown off track), we think this has more to do with shock force than resonance. I’m sure there are disk vendor engineers out there who know all about this (Bryan links to a good reference in his blog entry).

[Source: Sun Microsystems Blog (now Oracle)]

]]> http://andrewpeng.net/posts/2011/07/011294-be-nice-to-your-servers.html/feed 0 TX2K11 Dinner Meet Pictures http://andrewpeng.net/posts/2011/03/221158-tx2k11-dinner-meet-pictures.html http://andrewpeng.net/posts/2011/03/221158-tx2k11-dinner-meet-pictures.html#comments Wed, 23 Mar 2011 00:07:36 +0000 andrew http://andrewpeng.net/?p=1158 After filling up my memory card with pictures of Supras after Supras, I gave up. Here are some pictures of the night meet later that evening.

_MG_0143 _MG_0134 _MG_0118 _MG_0113 _MG_0107 _MG_0104 _MG_0101 _MG_0100 _MG_0092 _MG_0091 _MG_0089 _MG_0087 _MG_0086 _MG_0082 _MG_0070 _MG_0069 _MG_0055 _MG_0054 _MG_0053 _MG_0046 _MG_0043 _MG_0039 _MG_0023 _MG_0018 ]]> http://andrewpeng.net/posts/2011/03/221158-tx2k11-dinner-meet-pictures.html/feed 0 TX2K11 Dyno Day / Show ‘n Shine Pictures http://andrewpeng.net/posts/2011/03/211114-tx2k11-dyno-day-show-n-shine-pictures.html http://andrewpeng.net/posts/2011/03/211114-tx2k11-dyno-day-show-n-shine-pictures.html#comments Mon, 21 Mar 2011 12:11:14 +0000 andrew http://andrewpeng.net/?p=1114 Here are some TX2K11 pictures from this past weekend. Many thanks to Hennessey Performance Engineering, Lonestar Motorsports Park, and all the events sponsors for an awesome weekend. Pictures of the night meet and videos are coming soon!

_MG_0138 _MG_0083 _MG_0260 _MG_0256 _MG_0251 _MG_0248 _MG_0241 _MG_0229 _MG_0226 _MG_0220 _MG_0217 _MG_0203 _MG_0196 _MG_0174 _MG_0162 _MG_0159 _MG_0156 _MG_0140 _MG_0128 _MG_0127 _MG_0123 _MG_0117 This is a Mitsubishi Galant VR4, kept misfiring on the dyno and couldn't get a consistant run out of it. _MG_0111 _MG_0107 _MG_0093 _MG_0052 _MG_0040 _MG_0036 _MG_0033 _MG_0031 _MG_0024 _MG_0021 _MG_0009 _MG_0007 _MG_0001 ]]> http://andrewpeng.net/posts/2011/03/211114-tx2k11-dyno-day-show-n-shine-pictures.html/feed 0 Joe Nemechek at HostGator Houston http://andrewpeng.net/posts/2010/11/08979-joe-nemechek-at-hostgator-houston.html http://andrewpeng.net/posts/2010/11/08979-joe-nemechek-at-hostgator-houston.html#comments Tue, 09 Nov 2010 03:08:29 +0000 andrew http://andrewpeng.net/?p=979 Snapped off some shots in the morning before I came home

_MG_0239 _MG_0245 _MG_0254 _MG_0261 _MG_0263 _MG_0271 _MG_0273 ]]> http://andrewpeng.net/posts/2010/11/08979-joe-nemechek-at-hostgator-houston.html/feed 0