Article: Beast With a Thousand Jfets - Page 7

buzzforb · 08:06 PM

Uh Oh. Jacco and his affinity for all things rubber.
Oh, BTw, you are needed on aisle aleph J. Mr ZenMod. Calling Mr Zen Mod.

vdi_nenna · 22nd January 2013, 08:53 PM

Roger Corman Sounds a lot like Ed Wood.

vdi_nenna · 22nd January 2013, 09:01 PM

If one Fet goes out, how do you know?

jacco vermeulen · 09:13 PM

50 buck infrared temperature scanner, and a steady hand ?
(or wack someone over the head, and steal his IR camera)

Sorry, got to run, still some tire rubber to sniff.

vdi_nenna · 22nd January 2013, 09:20 PM

Quote:

Originally Posted by jacco vermeulen

50 buck infrared temperature scanner, and a steady hand ?
(or wack someone over the head, and steal his IR camera)

Sorry, got to run, still some tire rubber to sniff.

Someone once told me they used IR cameras while in the military.
They'd tell me why, but he said he'd have to kill me after.
I think he meant it.

jacco vermeulen · 22nd January 2013, 09:47 PM

The beauty of modern times, gadgets for a thousand dollars that were hush-hush once.

(e.g. deck mounted and joystick operated night vision cameras for yachts are under $5k, out on a pitch black sea really something to witness yourself)

portreathbeach · 10:49 PM

Here is a schematic I drew that has 4 op-amps in parallel. Each has a gain of 17.6 and an output resistor of 560ohms to limit the current. R1 and R2 are used at the front end to drop the voltage as the OPA2134 has in input voltage limit of +/- 0.7v. With a pk-pk input of 4v and the volume pot turned fully up, there is only +/- 0.66v at the input to the buffer.

Will this work? And if so, could I simply parallel a load more of the devices?

If this could work, maybe it could be 'The Beast with 100 Op-Amps'

buzzforb · 22nd January 2013, 10:51 PM

I like your projects. The floating shelves are nice.

portreathbeach · 22nd January 2013, 10:57 PM

Where did you see them?

Zen Mod · 22nd January 2013, 11:51 PM

isn't place for damn 8-legged bugs in some other thread ?

22nd January 2013, 08:04 PM	#61
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Uh Oh. Jacco and his affinity for all things rubber. Oh, BTw, you are needed on aisle aleph J. Mr ZenMod. Calling Mr Zen Mod. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man! Last edited by buzzforb; 22nd January 2013 at 08:06 PM.

22nd January 2013, 08:53 PM	#62
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA Blog Entries: 1	Roger Corman Sounds a lot like Ed Wood. __________________ I build, therefore I am.

22nd January 2013, 09:01 PM	#63
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA Blog Entries: 1	If one Fet goes out, how do you know? __________________ I build, therefore I am.

22nd January 2013, 09:11 PM	#64
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	50 buck infrared temperature scanner, and a steady hand ? (or wack someone over the head, and steal his IR camera) Sorry, got to run, still some tire rubber to sniff. __________________ Not so much,.......if it says "ZM" in the corner. Last edited by jacco vermeulen; 22nd January 2013 at 09:13 PM.

22nd January 2013, 09:47 PM	#66
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	The beauty of modern times, gadgets for a thousand dollars that were hush-hush once. (e.g. deck mounted and joystick operated night vision cameras for yachts are under $5k, out on a pitch black sea really something to witness yourself) __________________ Not so much,.......if it says "ZM" in the corner.


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22nd January 2013, 10:38 PM	#67
portreathbeach diyAudio Member Join Date: Jan 2010 Location: Cornwall	Here is a schematic I drew that has 4 op-amps in parallel. Each has a gain of 17.6 and an output resistor of 560ohms to limit the current. R1 and R2 are used at the front end to drop the voltage as the OPA2134 has in input voltage limit of +/- 0.7v. With a pk-pk input of 4v and the volume pot turned fully up, there is only +/- 0.66v at the input to the buffer. Will this work? And if so, could I simply parallel a load more of the devices? If this could work, maybe it could be 'The Beast with 100 Op-Amps' __________________ Another project of mine: (a very big one at that!) http://www.mp3car.com/vbulletin/show...5-pimping.html Last edited by portreathbeach; 22nd January 2013 at 10:49 PM.

22nd January 2013, 10:51 PM	#68
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	I like your projects. The floating shelves are nice. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

22nd January 2013, 10:57 PM	#69
portreathbeach diyAudio Member Join Date: Jan 2010 Location: Cornwall	Where did you see them? __________________ Another project of mine: (a very big one at that!) http://www.mp3car.com/vbulletin/show...5-pimping.html

22nd January 2013, 11:51 PM	#70
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	isn't place for damn 8-legged bugs in some other thread ? __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

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