Re: International standards

Induction sensor The Belden 8723 wire is 2TP 22AWG and a run can 100+ feet long, in metal conduit.

lightning

You think typing's bad, just try stereotyping sometime.

Most of the simple PWM circuits you come across will be OK. Even something like a 555 feeding a TIP Darlington is quite capable of running a big golf-cart motor, so a couple of these types of PWM could do the job. Electronic reversing would need an H bridge. Much easier though with relays. regards john

Whazzat? An Asian knock-off of a Wahl wart?

I have a DS18S20 connected to a pic, readings fluctuae on every read ie,

Thanks for any advice

Does anyone know of any National Electrical Code 2002 to download? Thanks Jack

No. Stereotyping is what the bad guy in "Under Siege II - The Dark Teritory" did to enter the passwords simultaneously.

and

them

square

sending out

electricity

filter

which is

Neither. The two freqs are so far apart that you should be able to get what you want by using a high pass filter. Change the coupling capacitor in the preamp to a smaller value, so that the lower audio freqs can't get thru. Or else add a high pass filter somewhere near the input.

Ask your question on the appropriate newsgroup, which is alt.radio.pirate. Or ask the Ramsey electronics people with an email.

market

titles

rock

always

the

schematic

electronics

components

early

used

down

today to

electronics

I've noticed it a _whole_ lot. I have a bunch of TAB books out in the garage for that exact reason. I picked them up for real cheap at thrift stores or garage sales, etc. I started to check each book out and found that there was so many errors that I wouldn't consider it a worthy addition to my library and I certainly wouldn't wish it on even my worst enemy, so I tossed it in the garage. These books have gross errors and omissions,

hard

read

updated

to

to

with

rewrite

given

I sympathise with you. I wish there was some kind of rating system for books.

metal

You can put reverse biased diodes across some points to clamp the voltages to the supply and ground. Zeners also might help in certain places. When all else fails, use sockets so that you can replace the parts that burn out. ;-)

And make sure that the diodes can handle high enough current to not burn out, too.

Oh, stereotyping is easy. Mine's a Kenwood.

Bob M.

Being a true masochist, I thought I'd try deriving the Laplace xfer function for this filter and it's getting ugly. Before I go further, I thought I'd ask if I'm setting it up right, er, umm, ... efficiently?

Ok, here's my situation:

I have this project where I would like to do some remote sensing of

After reading up a bit, I'm thinking the most straightforward way is to use some microcontroller with a digital RF transmitter, say for example the rfPIC12C509AF, and an ADC to collect and transmit data cyclically to a reciever connected to my PC.

It's the receiver I'm wondering about. I kind of expected this to be a rather typical use for a transmitter (send telemetry to your computer), so I kind of expected to see some receievers that I could connect to a PC, say via a serial port, obviating the need to build one myself. But I can't find any.

So, can anyone point me to something that does what I need? More generally, does this sound like a good strategy? I'm open to suggestions.

In case I've successfully managed to hide the fact that I haven't done anything like this before, I'd like to keep it straightforward. I have to order all this stuff from scratch. I do know the equations very well, but I have hardly any experience actually wiring stuff together.

Thank you for any help,

Some purported unicorn horns are actually narwhal tusk. :-)

Cheers! Rich

From "The Best Cartoons From Punch" ca. 1955:

Man at typewriter repair shop, to shopkeeper: "Pvpry timp I strikp thp lpttpr "p", I gpt an "e".

Cheers! Rich

Generate a supply limited square wave, couple to a voltage doubler (3 diodes + 3 capacitors) sitting on top of the + supply . O/P = 9V + 2X9V

- volt drops minimised by using schottky diodes. Regulate o/p down to 18V.

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Do a web search on "RF modems". There are a lot of companies that make fairly inexpensive units. You could use a cheaper PIC, and output RS-232 into an RF modem linked to your PC. As a bonus, your PC could also talk to your PIC and do any kind of control you might need.

John

In response to what John Schuch posted in news:_64Rc.12012$ snipped-for-privacy@newsread2.news.pas.earthlink.net: