Electronics Forum / Basics / May 2006

I'm trying out how to make my project work, and it is really simple: An
IR emitter/reciever will control an electric motor's on and off. So
what I'd like to know is:
1) What kind of microcontroller should I use? I've played around with a

What is the differnce between Tachogenerator and Encoder
Pls explain me

Hiya
I recently bought two transformers for my two guitar pedals.
The transformers are regulated voltage, you choose the level of voltage
you want on the side.

I just got Vonage (www.vonage.com), a DSL service for voice telephone.
It has a jack from a modem for your telephone, which works just fine.
However, I was wondering if I could plug it into the existing telephone
(POTS) wiring in the house.  I did but it does not work.  Is there any

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would like to live and work in China,  then comes the chance!  Nanjing
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I'm trying to use my little AVR to control up to 12 120VAC loads, up to 5
amps.  Does anyone know of a cheap (< $5 US) relay (SPST-NO) that only
needs 40 mA or less to activate?  My Tyco T77 relays need 90 mA at 5VDC to
pull in the contacts, it turns out, so the processor dies. The ...

My current project involves adding bluetooth to a pda that lacks it.
For this I've settled in a BT module with uart interface that will be
connected throught a transceiver to the pda's current rs232 port.
Instead of anulating the rs232 external port I would like to add an

Greetings to all,
Recently, I've been asked to conduct some PSU test, nothing professional
but certainly more demanding than putting it in a PC and "test" it with
MBO probes. However, I've run into some problems, as it seems. To

Howdy!
Catalogs have been finally updated, and cleaned up! Now dowloadable as
simple text files. Also some errant phone numbers (Thank the printer of
the document I had to work with!) have been fixed. Sorry for any

How easy is it to install a ceiling fan? Any special tips? Can I do it
by myself? Handy man businesses cost a lot.

If I have a LED driven from a electronic VU meter, is there a way to have
the led remain on (for approx 5 sec) when illuminated, then extinguish
slowly (over approx. a 5 sec.period).
So, in other words...when the led is illuminated by a audio level, it stays

Is there any easy way to delay an analog signal through a cable by half
a second? (without digital conversion)

    --I've got a loooooooong driveway. I want to put some EL wire on a
sign at the end so people know where to turn. The EL uses a pack of AAs to
run a driver circuit, easy enough, but I'd like to have a way to turn the
driver on and off remotely. Can anyone suggest an off-the-shelf ...

Is there any reason why I can't use a variable transformer to reduce the
speed on a mini-lathe?
http://www.ares-server.com/Ares/Ares.asp?MerchantID=RET01229&Action=Catalog&Type
=Product&ID=82995
This one has a listed minimum speed of 600 RPM which is way too fast for me.

I am trying to use a at9sam7256 microcontroller.. i am using a
programmable clock out line of this chip to drive a omnivision 9640
camera chip.
The problem is that the clock signal seems very unstable.. i.e. the