Electronics Forum / Design / June 2006

                   Red Beans and Rice
This is the traditional New Orleans Monday lunch or dinner.
It takes all day Sunday to make, and tastes better after
sitting overnight.

How would I go about modeling a lead acid battery and solar panel in
SPICE?
I'm figuring simple voltage sources aren't accurate representations.
When I parallel a 12V source and 14.8V source and probe the shared node

If I have a digital oscilloscope that has, say, a 1GHz bandwidth, presumably I
need to sample the input signal at something above 2Gsps if I want to capture
all the information present in the signal -- say 2.5Gsps given the anti-alias
filters I might be able to realistically ...

I'm currently working on a project that requires recording multiple audible
frequencies to the same audio file. Basically I'm recording the tone and
monitoring the freq spectrum for freq changes over a long period of time.
I'm using a 555 to produce the tone, since its frequency ...

Just a quick question - does anyone out there know where I might get
hold of a spice model for the BC549C ?  I've searched around on the
internet, but so far I havn't managed to find anything.  Philips
Semiconductor seem to have spice models for every transistor under the

I've made a cube lamp out of unpopulated circuit boards.  It looks
great but I would like it to do more.  I want the single 60w bulb in it
to pulse, slowly going from dim to bright and back to dim and so on.
It would pulse at a slow constant rate.  If the ambient noise level

    I need about 5% duty cycle pulse of about 1 sec time period. A
second pulse required should be of same characteristics but delayed by
a duration by about the 'on' time of the first pulse. ie I need to
delay the pulse. Need a simple solution please.

I am a local university undergraduate. On the coming semester, I have
to do my final year project. I am taking Electrical Engineering now.
hello world,
can u all give me some ideas which is relevant to the electrical

I am using a P89C52 for Keyboard reading purpose. I have a problem that
when i turn on and off the device(Keyboard) it sometimes reads the keys
and sometimes does not. P89C52 has a active high reset, the above
problem is solved when i repeatedly reset the microcontroller manually

Can you please let me know where to download free version for PCB
designing. Cct which i want to make has a maximum of 24 pin IC.
regards,
Prateek

What's the highest energy cap available and it's source?
The most cost effective?
where energy is the product C * V^2

We just bought out an entire electronic surplus house and are having
trouble identifying certain parts.
This one is an obviously expensive UHF to something adaptor or connector.
The sort of stuff that Amphenol is good at.

I'm looking at building, or actually having built, a step up converter
to go from 12v DC to 16v DC, similar to this:
http://www.auto-physics.com/ for racing purposes. Does anyone know where
I might find a schematic to do something like this?

Part number is SanKen SI-3150G Japan
Here us the image: http://www.tinaja.com/images/bargs/sankca01.jpg
It sure looks like a 20 watt stereo car audio output module.
Going to the "usual suspects" turns up SI3150's and SI3150F's and such

Can anyone help me?
I am currently doing research on sparseness matrix issues. As I am
carrying on this topic, I had a problem that don't know what to do.
Basically the problem is as follows: