Re: Electronics and barter?
- From: cbarn24050@xxxxxxx
- Date: Sun, 8 Feb 2009 04:51:22 -0800 (PST)
On Feb 8, 11:59�am, Jan Panteltje <pNaonStpealm...@xxxxxxxxx> wrote:
On a sunny day (Sun, 8 Feb 2009 03:29:08 -0800 (PST)) it happened
cbarn24...@xxxxxxx wrote in
<c05254cd-378c-4348-8527-d4667d469...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>:
On Feb 8, 11:08 am, Jan Panteltje <pNaonStpealm...@xxxxxxxxx> wrote=
:
I was just reading an article in the NYTimes about Russia,
where there seems to be a new era of barter between companies,
now that the financial crises has hit there too.
So how about my PIC PWM design against your car?
You mean you've actually got it working? Got any measurements you'd
like to share?
Of course the PIC programmable RGB LED controller is working.
It has been running for more then a week day and night.
Wakes me up with LED light (has 5 programmable timers).
I emailed the LED strip company about when I get the RGB strips I ordered,
and they think I have those Wednesday.
As I ordered cables too, they needed some time to make the cables....
And _that_ design is here:
�http://panteltje.com/panteltje/pic/col_pic/index.html
You need to add some power MOSFETS or transistors to the PIC output for the
big LED strips.
If you were referring to the PIC switchmode design,
yes that has been working for a while now,
you can see some older pictures here:
�ftp://panteltje.com/pub/power_pic/
It delivers about 24 Watt with that transformer, that
transformer is actually a mains interference filter :-).
With 12V gel battery as input, it will do from zero to 25.5V output,
with cycle by cycle current limit, LCD display of input voltage,
output voltage, output current, output voltage setpoint, and time.
It has the option of setting the output voltage with a simple pot,
or doing it via RS232, all parameters including the current trip,
soft start delay, max PWM angle, etc, can be set via RS232 and are
saved in EEPROM.
Do I need to make the frequency selectable via RS232 and stored in EEPROM?
A nice idea.
I have to re-write the LCD driver as I moved around all output pins.
So, it is a hysteretic design regarding the voltage control section,
with a cycle by cycle current limit, using the 2 analog comparators in the PIC.
How much power, and what voltage you use the PIC for, depends on the power stuff,
not on the PIC.
Follow the postings named 'Universal PIC switchmode status report'.
So no actuall testing has been done for regulation,noise, ect.
Of course I will be more then happy to accept your car, especially if it is environmentally green,
I could paint it green if that would help.
in exchange for the software.
Software is free isn't it?
If you really want to play with the software 'as is' (that is last night's version),
provide me with a working email address, I will send it.
It works.
But how well does it stack up to usuall method?
The source asm has a pinout assignment listing, the pictures in the above link should
show how to connect things, and it actually has a shot of the old diagram too.
I will have to draw up a new diagram.
I have a bunch of new ideas about the soft that I want to try, not until I am 100% ready with all that,
will it be on my site.
This one would make a very nice little universal lab supply.
Maybe but not untill you have measured its performance.
.
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