Electronics Forum / Basics / January 2007

This is basic, but the post is longish. I replaced the light switch in
my house because the ceiling light would not come on. It still does not
after switch replacement. Old switch tests as good. Using a two-wire
device with a small lightbulb, I have tested the switch hooked up in

I have torches with 6 white led's running off one 1.5 volt battery and
already I have had hours of use of the torch.
I have made up circuits of led's for my boat with the correct
resisitors to run off 12 volt supply but what circuit, or led's do they

I am wondering if anyone has any PDF's on pic programming.
If microchip ever had these (as suggested by AN910) I can't find them
anywhere on their site.
I am using a Linux program ( at <http://www.captain.at/electronics/pic-programmer/> )

I wanted to know if by using two lm350 in parallel, I would be able to
use 2 * 3amp ?
One of them usually regulated a max of 3 amp.
I also, I heard i could add a transistor in parallel to one LM,  where

I'm not very good with electronics yet, but I have an application which
I wish to build myself and hopefully learn something in the process.
I have an equation that performs some multiplicaiton and division to an
input from a reed switch or hall effect sensor count.  This ...

I'm thinking of getting a TC1427 mosfet driver to power a motor by
parallel port.  I'm about to place the order, then I thought of a few
questions:
Can I drive a 1A load directly from Pin 7 of the TC1427?  Or is this a

Why MOS referred to Metal-Oxide Semiconductor when there is
typically no Metal-Oxide present ?  Should it be Metal-Oxide-Semiconductor
representing the three layers of the device?

I tried making a boost converter (as in the pic here:
http://en.wikipedia.org/wiki/Boost_converter ) from a 10V battery pack,
a large inductor (basically, the coil for a 110VAC C-frame motor), a
diode and a 400V 100uF cap.

I am seeking help in understanding what powerline communications or
Homeplug devices might be available to help me with a small project.  I
need run between 25 to 35 monitors from a server(s).   The monitors
will be located between 50 to 400 ft from the server(s).  I want to use

Where can I read the principles of I2S?
I found it in some Audio CODEC applications.
I do not know the reason why it uses three different clocks Master
Clock, Bit Clock and Data Alignment Clock.

hello everbody..
I am planing to prepare a fm radio transmitter.
It should cover the area of my college i.e.approx. 50 acre
can you tell me basic requirement and the cost..

Hello, If any one could tell what actually a PSP is i.e. program
segment prefix.. how it is useful in while simulating DOS copy command
in assembly language???

Suppose I have a 12 volt motor that operates on two 6 volt acid-free,
lead batteries; I was thinking that perhaps I could put to use at least
two extra batteries I have in an effort to increase the period of time
for power available on the motor. I am not certain, as I forgot, about

Hello, I have a LM4562 op amp circuit set up as shown in the microphone
preamplifier section of the data sheet in the following link
http://www.national.com/ds/LM/LM4562.pdf .  The performance of the pre
is very good from 10 Hz to 50 kHz on a line input.  But when connected

In reference to this part again:
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2469
MAX4469 microphone preamplifier
Would it be suitable if I add a variable feedback resistor for volume