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Sci.Electronics.Basics
Sci.Electronics.Basics is a worldwide Usenet news group that is used to discuss basic electronics questions.
There are 4733 threads in our archives.
You are looking at page 27 of 474.
The threads with the newest articles are listed first.
A mechanical volume control that actually works! [2 articles]
John Doe - 2009-11-24 13:27:00
Like most everyone else, I have had many devices that included a
mechanical rotary volume control. And as far as I can remember, on
every single device, the volume control eventually failed, usually...
Need a beeping device [5 articles]
Richard - 2009-11-22 16:44:00
Hi,
I am looking for a component to control from a microcontroller to make
a beeping noise, nothing to loud but to sound electronic and not like a
buzzer. I just need an audible alert that is ...Broadband transformer center tap? [3 articles]
Hammy - 2009-11-21 16:06:00
I want to use a transformer on the output of a DAC on a AD9834 DDS IC.
Heres is a picture of using a transformer on the output of one of
Analog devices DDS IC's.
http://i48.tinypic.com/25gvw5...antenna grounding [19 articles]
2009-11-21 12:04:00
I'm about to get of the cable tv merry go round and am installing an
antenna on my roof. The problem is that the service entrance for my
coax is on the side of the house and the most direct downwar...AC, DC, Power Supply follow up [4 articles]
Uriah - 2009-11-21 08:01:00
I had posted a question a few days ago about needing to power a bill
acceptor that requires +12DC, -12VDC, +5VDC, and 6VAC and there is
only one common ground wire. I needed to hook up a AC Bench P...transistor astable multivibrator [9 articles]
John - 2009-11-18 22:30:00
Hi, when i make one of these using say 2n3904's and a couple of 10uf caps
with a cycle time of about 1hz (r=100k approx) i find that the
extinguishing led (the other will be lighting) never quite g...Question for the gurus [9 articles]
Dave - 2009-11-18 20:43:00
I have a friend in a wheelchair who has a home automation system that does
things like opening doors on voice command and such, to make his life easier
(he's parallyzed from the neck down.) Unfor...override timer in bathroom fan [4 articles]
Nigo - 2009-11-18 17:06:00
Hi there
I have a bathroom fan which turns on whenever the lights turned on.
After the lights is off again it continues for 2-32 minutes (can be
adjusted on a small potmeter). It also turns on if...Gerber files [6 articles]
pawihte - 2009-11-17 20:10:00
I've been designing and making PCBs for my own use for almost 40
years now. The few times I needed more than a couple of units, I
had the pattern printed by local silk-screen printers. It's only
...Trying to identify a chip... [6 articles]
Dave - 2009-11-17 11:07:00
Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for this
chip shows pin 5 as VDD, and I am wondering, isn't VDD usually the same as
GND? (Don't see any pins labled as GND, although...