Electronics Forum / Basics / January 2008

I'm building a power supply for an 8 transistor radio, that originally
used 6 "D" cells, involving a rectifier bridge, filtering caps etc,
but there's on problem,which is I can't seem to find an AC transformer
outputting 6 volts that fits in the case I want to use.  I have no

I took apart an old vacuum cleaner with 12 amp motor, made for U.S. 60
Hz AC household use so I could experiment with turning the universal
motor into a generator.  I know it's a universal motor because
applying 12 volts from a battery will get the motor to turn, same

I am a victim of RNM here in Canada.  My life haas been horrible the
last 1.5 half been harassed by a local member of society.  I am
thinking of moving to the UK or to New Zealand.  Will this technology
reach these countries.  If I migrate to them will I end up being free

One of the panels on the bridge has an EL backlit LCD. The backlight on
this unit fades badly over time and the inverter is also prone to
failure, so I sometimes need to fix them. Not only that, but EL backlit
LCDs seem to be getting hard to find, and in particular the LCD module

Bairine technology has 6 years experiences in supplying series of
electronics and PCB related components with our best service. We have
a large scale of real stock with PB free for
Diodes,Capacitors,resistors...

I'm a physics student and I just finished a (mostly theoretical)
electronics class. I really enjoyed it and I was able to get a grant
through my school for $250 to buy some electronics equipment to
continue my studies independently (my school only offers one

I am not very knowledgeable when it comes to electricity. I have a
wireless router that takes an input of 5V/2.5A but I lost the power
supply for it. I have another power supply from another wireless
router that is 5V/3A. I heard that Volts can fluctuate a bit but Amps

i have heared about different kinds of computer softwares for
electronics simulation. but i am wondering which one is the best, and
the most practical. can anybody tell me which one i should install on
my computer? i have heared about EWB, PROTEUS, PROTEL, P SPICE and

is a xenon strobe light suitable/efficient  for erasing uv EPROMs
are there any details that should be attended to if the answer is
maybe ?
i did google  and these found sirtes

whenever a satellite or tv remote control button is pushed down, a
specific frequency is created. how can i save a binary number relative
to the frequency created, on a microcontroller?

I built a circuit to deliver a 40mA pulse on top of a 10mA DC offset.
The 40 mA pulse is for 100uS.R4 & C1 set the approximate 100uS time
constant. I'm thinking there must be a way to rapidly discharge C1
when the switch opens using fewer components then R11, X1, and Q6 plus

I need to adapt a little LED torch from a standard LED light to an
Infra-red LED. It's all very simple, but I don't know what sort of IR
LED to get. The current LED just has one pin touching the batteries and
the other bent back to make contact with the switch when it's on. The

I just discovered that my fairly new Davis Vantage Pro 2 weather station
takes CR123A batteries. They are recharged by the solar panels. From my old
no longer used Canon SLR film camera I have several Duracell unused (fresh
in the package) Duracell Ultra batteries. Can these be ...

Does anybody know of a home video surveillance system?
I have a neighbor who has been periodically vandalizing our property
over the past 3 years. I want to set up a hidden camera system to
record him. The police said they can't do anything unless I catch him