Electronics_101 at Yahoo! Groups

Re: spot frequency generator

Paul Read — Wed, 10 Feb 2010 10:19:20 GMT

Hi Nick, I think there is an application note from National Semiconductor www.national.com that has an op-amp based function

Re: spot frequency generator

Paul Read — Wed, 10 Feb 2010 10:16:25 GMT

Hi Jong, I have not run it for long enough yet, but as you say it should last forever.....Mr Hewlett seemed to like the idea in the 1940's ! I picked the

Re: X2Y capacitors for EMI

John Popelish — Wed, 10 Feb 2010 04:44:20 GMT

... Surface mount capacitors can certainly be effective at shunting signals on the board. My comment was based on a reference to X2Y capacitors, which are I

Re: Industrial Automation

James M.(Jim) Geidl — Wed, 10 Feb 2010 01:20:17 GMT

Richard, Depreciation is an expense, period. In some ways it is worse than a simple expense because you can take the cost of capitol expense items all in one

Re: Hello from a new guy

jong kung — Wed, 10 Feb 2010 01:05:51 GMT

Larry, ... You could NOT have picked a better time to get involved in electronics. There are a lot of "robot kits" that you can buy to control motors. If you

Re: Industrial Automation

rtstofer — Wed, 10 Feb 2010 00:50:34 GMT

... No, all it does is increase the book value of the property and increase the amount of depreciation. Accountants treat depreciation as an expense but for

Re: Hello from a new guy

Mike Payson — Wed, 10 Feb 2010 00:35:15 GMT

Hi Larry, We're happy to help. I suspect the rule is more to discourage people who sign up and ask how to fix their stereo, then go away... That's not what the

Re: Hello from a new guy

alienrelics — Wed, 10 Feb 2010 00:33:36 GMT

I don't know what group you got those messages from, it wasn't this one. One of them starts off with "We're here to help". Another says: "The Electronics_101

Hello from a new guy

playstation271 — Wed, 10 Feb 2010 00:28:11 GMT

Hi everybody, I'm a retired mechanical engineer and I love to "tinker" in my little workshop in rural Indiana. From time to time I try to design some type of

Re: Industrial Automation

jong kung — Tue, 09 Feb 2010 23:59:06 GMT

Richard, ... Yes. The folding kind and the kind that make jingling noise. Or you if you ask my wife, there OUR money and HER money. ... Sorry ... ... Doesn't

Re: X2Y capacitors for EMI

basicpoke — Tue, 09 Feb 2010 23:11:33 GMT

Thanks John. The caps we would add would be surface mount, so no leads. Do you still think they would be ineffective. I think those ferrite clamp-ons are

Re: Industrial Automation

orvillefpike — Tue, 09 Feb 2010 22:55:11 GMT

You shut down the ventilation when the building is inoccupied this way you don't need fresh air, you start it back an hour early, in the morning to purge the

Re: spot frequency generator

jong kung — Tue, 09 Feb 2010 22:44:50 GMT

Hi Nick, ... Just to further explain what they are saying is... Many function generator IC has some sort of "control voltage" or "Freq Adjust" input (or

Re: spot frequency generator

Howard Hansen — Tue, 09 Feb 2010 21:34:44 GMT

Almost the same suggestions as last time. Use a function generator IC like the http://www.exar.com/Common/Content/ProductDetails.aspx?ID=XR2206 and a sawtooth

Re: Industrial Automation

rtstofer — Tue, 09 Feb 2010 21:06:57 GMT

... This is a complicated question! The HVAC society has standards (ASHRAE) for air volume (outside air and total) as a function of occupancy. When the