Spaceship Apple

Started by John Larkin in sci.electronics.design9 years ago 34 replies

http://www.theregister.co.uk/2013/04/04/apple_spaceship_hits_turbulence/ It works out to almost $1800 per square foot. -- John...

http://www.theregister.co.uk/2013/04/04/apple_spaceship_hits_turbulence/ It works out to almost $1800 per square foot. -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photon...


bandpass filter

Started by John Larkin in sci.electronics.design8 years ago 217 replies

Is there a form of bandpass filter that has no phase shift vs frequency around the center of its passband? -- John Larkin ...

Is there a form of bandpass filter that has no phase shift vs frequency around the center of its passband? -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberopt...


DVD Optics question

Started by 5k3105 in sci.electronics.design9 years ago 7 replies

CD and DVD data is written to the surface in 1s and 0s. Is it possible to write to DVD or CD a variable intensity line? My interest is an...

CD and DVD data is written to the surface in 1s and 0s. Is it possible to write to DVD or CD a variable intensity line? My interest is an optical version of a vinyl record - a smooth continuous wave for recording sound in the analog domain, not digital. I imagine some modifications to the laser read/write amp on the DVD writer would be needed - or maybe that the DVD media itself is not ...


Transistor tester

Started by Phil Hobbs in sci.electronics.design9 years ago 52 replies

I'm just finishing up an interesting job for a group in the Department of Chemistry at Notre Dame. It's a laser noise canceller that works...

I'm just finishing up an interesting job for a group in the Department of Chemistry at Notre Dame. It's a laser noise canceller that works down in the 10 nA-50 uA range, about 100 times lower current than the original model. Noise canceller performance depends pretty well completely on BJT diff pairs and cascodes performing as Ebers and Moll predict, so that the fluctuations see exac...


DDS wisdom

Started by Phil Hobbs in sci.electronics.design7 years ago 152 replies

Hi, all, I have a gig coming in that will have me revisiting my thesis research from nearly 30 years ago, on interferometric laser...

Hi, all, I have a gig coming in that will have me revisiting my thesis research from nearly 30 years ago, on interferometric laser microscopes. (Fun.) Back in the day, I made a nulling-type phase digitizer at 60 MHz by driving a phase shifter with a 12-bit DAC (AD-DAC80), and wrapping a 13-bit successive approximation loop round it (AM2904 with an extra flipflop). With quite a lot ...


candy cane

Started by John Larkin in sci.electronics.design9 years ago 9 replies

https://dl.dropbox.com/u/53724080/Parts/candy2.jpg -- John Larkin Highland Technology Inc www.highlandtechnology.com ...

https://dl.dropbox.com/u/53724080/Parts/candy2.jpg -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, s...


cold!

Started by John Larkin in sci.electronics.design7 years ago 95 replies

Yikes. http://abc7chicago.com/weather/subzero-wind-chills-for-chicago-area/523072/ http://vencoreweather.com/2015/02/17/29475/ Good thing...

Yikes. http://abc7chicago.com/weather/subzero-wind-chills-for-chicago-area/523072/ http://vencoreweather.com/2015/02/17/29475/ Good thing we have all that natural gas; we will be needing it. Windmills and solar cells won't keep us alive in a massive blizzard. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att hig...


the PDP-11 lives!

Started by John Larkin in sci.electronics.design9 years ago 36 replies

http://www.theregister.co.uk/2013/06/19/nuke_plants_to_keep_pdp11_until_2050/ -- John Larkin Highland Technology,...

http://www.theregister.co.uk/2013/06/19/nuke_plants_to_keep_pdp11_until_2050/ -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME the...


LED's

Started by John Larkin in sci.electronics.design10 years ago 3 replies

http://tinyurl.com/7h9fsmq -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot...

http://tinyurl.com/7h9fsmq -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation


famous at last

Started by John Larkin in sci.electronics.design10 years ago 16 replies

http://www.eetimes.com/electronics-blogs/pop-blog/4237264/Engineering-s-strangest-offices?pageNu mber=9 -- John Larkin, President ...

http://www.eetimes.com/electronics-blogs/pop-blog/4237264/Engineering-s-strangest-offices?pageNu mber=9 -- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberop


that Tesla review

Started by John Larkin in sci.electronics.design9 years ago 6 replies

http://www.topgear.com/uk/videos/electric-shocker?VideoBrowserMode=this-week&Page=1 -- John Larkin Highland Technology...

http://www.topgear.com/uk/videos/electric-shocker?VideoBrowserMode=this-week&Page=1 -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links V...


power diagnostics

Started by John Larkin in sci.electronics.design9 years ago 2 replies

http://www.computerpowertest.com/ -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at...

http://www.computerpowertest.com/ -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachomete...


klutzy web site

Started by John Larkin in sci.electronics.design9 years ago 1 reply

http://www.nxp.com/parametrics/48014/#/p=1,s=0,f=c7e3a1:109;405,c=,rpp=,fs=0,sc=,so=,es= -- John Larkin Highland...

http://www.nxp.com/parametrics/48014/#/p=1,s=0,f=c7e3a1:109;405,c=,rpp=,fs=0,sc=,so=,es= -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data...


tornadoes

Started by John Larkin in sci.electronics.design9 years ago 12 replies

https://www.youtube.com/watch?v=HN7I9KQjVG8 -- John Larkin Highland Technology Inc www.highlandtechnology.com ...

https://www.youtube.com/watch?v=HN7I9KQjVG8 -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro,...


Shuttle over the bridge

Started by John Larkin in sci.electronics.design9 years ago 164 replies

http://www.theregister.co.uk/2012/09/21/endeavor_buzzed_the_golden_gate_bridge/ Pity they didn't have the guts to fly *under* the...

http://www.theregister.co.uk/2012/09/21/endeavor_buzzed_the_golden_gate_bridge/ Pity they didn't have the guts to fly *under* the bridge. -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers an...


really funny

Started by John Larkin in sci.electronics.design7 years ago 37 replies

...

http://www.dailymail.co.uk/news/article-2835479/Knowing-program-computer-key-success-Upstairs-Do wnstairs-society-reality-school-leavers-unable-write-code.html The entire world economy will soon consist of everyone selling everyone else apps. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott


"engineers should embrace the role of the arts"

Started by John Larkin in sci.electronics.design7 years ago 36 replies

http://www.bbc.com/news/education-30136921 That's backwards. Artists should embrace the role of engineering. -- John Larkin ...

http://www.bbc.com/news/education-30136921 That's backwards. Artists should embrace the role of engineering. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


Cave Art

Started by John Larkin in sci.electronics.design8 years ago 14 replies

https://dl.dropboxusercontent.com/u/53724080/SED/Cave2.jpg -- John Larkin Highland Technology, Inc jlarkin at...

https://dl.dropboxusercontent.com/u/53724080/SED/Cave2.jpg -- John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, sync...


cool high voltage generator

Started by John Larkin in sci.electronics.design8 years ago 32 replies

https://dl.dropboxusercontent.com/u/53724080/Circuits/Amps/HV_GEN.jpg -- John Larkin Highland Technology...

https://dl.dropboxusercontent.com/u/53724080/Circuits/Amps/HV_GEN.jpg -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, ...


RLC bridge

Started by John Larkin in sci.electronics.design10 years ago 187 replies

It's end-of-FY toy buying time, and I'm thinking about getting an RLC bridge. The SRS SR720 is an option. Any opinions or...

It's end-of-FY toy buying time, and I'm thinking about getting an RLC bridge. The SRS SR720 is an option. Any opinions or suggestions? -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers...