Electronics Forum / Electronics / April 2004

Greetings group.
I am planning to design a driveway alarm.
The aim is to install some kind of sensor to detect a vehicle
in the driveway up to 100m from the house.

I'm trying to help my son fix his moped from his telephoned information that
"The battery runs down in a few hours". Basically I know nothing about moped
circuitry and there seems precious little help on the web about this. I can't
even locate a workshop/service manual for the ...

I am having a little trouble understanding how this circuit works.   I
got this circuit from one of my microcontroller books in a chapter
describing how to use a PIC16C71 to generate a NTSC-compatible video
signal but I assume that any other microcontroller can use the

I'm trying to solder some twisted pair leads from several coils to 38
AWG coax for an MEG experiment. The trouble I'm running into is that I
can't find anything to remove the insulation from the 40 AWG magnet
wire. Any suggestions on what would remove the insulation so the wires

I have been given a few Axis NPS-530 printer to network adaptors. They run
on 12vdc, one end plugs directly into a printer via the normal old paralell
printer connector, the other end has a socket for a network cable. These
units can be programmed for Static or Dynamic IP addressing ...

looking for a cheap laptop for my boy, he cant sit in front of a home pc so I was hoping a laptop
would help him. need something that will run games (P111 500ish) and can talk to him mate on line
and surf.
anyone got any ideas were I could get one that wouldn't brake the bank as im ...

Grettings.
The E.A. web site used to be available via S.C.,
but I cannot find it anywhere.
Does it still exist?

Pretty basic question here.  Let's say I have a slab of intrinsic Si
just above 0 Kelvin so thermal effects are negligible, the valence
band is full and the conduction band is empty.  To get an electron out
of the valence band would it just be a matter of me applying about a

My nokia 3100 has got this problem. It seems that the screen does not make
contact. The screen makes stripes like a garage door and sometimes it goes
out completely.
Also, recently the phone stopped ringing or vibrating. Like its on silent

I have contacted NEC about 6 weeks ago and I still havent heard from them,
any idea where I could get a service manual for this model?  Id like to
replair the ones I have and not throw them out.
One shuts down as soon as the tape is put in, turn it on, press eject and

i want to connect an old S/P DIF - card from Terratech (Digital Xtension
Ver. 1.2) to my Audigy 2 ZS.
Is this possible?
What pins do i have to connect?

I am interested in buying the following books:
     PRACTICAL AUDIO AMPLIFIER CIRCUIT PROJECTS
     Author : Andrew Singmin
     HIGH-POWER AUDIO AMPLIFIER CONSTRUCTION MANUAL: 50 TO 500 WATTS FOR

I just bought some Acoustic Research AR-94's on Ebay
Any recommendations and pricing ?

Does anyone know where I can obtain a hotplate element for
a Whirlpool ES5000 stove?
We want a replacement for one of the small hotplates.
Diameter = 20cm Height = 6cm.

I have just acquired this camera.
All works except the mic is missing.
Its a Sharp C770 VHS-C camcorder.
Just after the microphone for it. Can i just use a normal mic?