Latest threads in Electronics Designshow only best voted threads
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OT: "Materials" group
Hi, I suspect it's a long shot -- but, is there a newsgroup that deals with materials, *generally*, wrt their properties and characteristics? (metals, plastics, rubbers, etc.) I.e., to be able to...
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9 years ago
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cosmological constant as a property of integrated gravity curvature in spacetime
Hi, From wikipedia: "The cosmological constant ... is the value of the energy density of the vacuum of space" I think that the cosmological constant is actually the integrated sum of all gravitational...
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9 years ago
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anyone want to sell Boardmaker2 DOS-based PCB design software
Has anyone got an old copy of Tsien BoardMaker2 with BoardCapture ? This is old DOS 16-bit PCB design software. It is comprised of disks, parallel dongle and manual. The manual is not essential. The...
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9 years ago
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S'ware Generated Sinewaves for Motor Drive
I have an audio editing program (CoolEdit) that can generate audio frequency sinewaves and adjust the relative phase of each. I would like to generate three at 20Hz (for 120RPM), offset from each...
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9 years ago
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Voltage-variable capacitor doesn't work in LTSpice
Gentlemen, Setting up voltage-controlled resistors is easy: R=(V(X)+0.01) or whatever. Works, always did. Doing the same with a capacitor fails with this error message: Error on line 6 : c1 n002 0...
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9 years ago
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icicles, again
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com
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9 years ago
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different between gravitational force and gravitational field
Hi, If there is a mass exactly between two stationary equal masses (ie big stars or blackholes) the gravitational force will cancel out and there will be no movement in the system (big stars...
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9 years ago
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Wireline emulation for ADSL testing
Good morning :-) I came to a need where I need to emulate copper wireline in order to test ADSL modem in a lab. I have ADSL DSLAM and ADSL modem which work on a few meters cable but this can't be the...
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9 years ago
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multibody gravity question
Hi, For a multibody stationary system of uniform mass points distributed in 2D or 3D space, is there a way to precisely find or estimate the location in 2D or 3D space where the gravitational field...
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9 years ago
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OT: Hardwood vs Softwood
I'm guessing studs in the walls of a house are likely to be "softwood"? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems |...
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9 years ago
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proto boards
Can someone recommend a supplier for small quantities (like 4) prototype 4-layer boards, with reasonable turn time (1-2 weeks)? -- John Larkin Highland Technology, Inc picosecond timing precision...
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9 years ago
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gate current
This is cool: Drain is positive, source is positive, gate is negative! -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com
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9 years ago
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Op-amp Summing Amplifier
Good feature of op-amp summing amplifier is that there is direct current pa th provided from every input to the output. For that reasons input voltage sources don't need to have current sink...
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9 years ago
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Time Delay Switch From Signal
Hi all, So here's the background. I have a salt-water pool with a heater, so there are two main risks for the heater: (i) salt water; and (ii) standing heat ed water (especially salt water) in the...
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9 years ago
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Water solenoid buried control line dscovery
Say have 8 control lines from timer box go out,each to a given water on/off solenoid. Given that only two were eye findable since they were above ground or in protective box at ground level. All other...
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9 years ago
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