This is a special section were I post the requests
of people that write me concerning the projects on this page as well as those
topics related to them.
I have them all in my Contacts and wish to add more people
to notify them of web site updates.
Please join my e-mailling list.
Hello Jesus !
Let me introduce myself to you.
I'm Robbert van Herksen, a dutchman born in the
currently working in southwest
company.
I am sending you this message, because I want to know more about
programming PLC's in general, and I think you have some experience
withy this subject.
On the internet I found a page, where you can download a book about
programming PLC's (http://www.plc-training.com/)
and maybe you can advice me, if it is worth to download this book (see
the link)
Thanks for reading my email, and hope you can advise me on some
things.
--
Best regards
____
__
__
__
/ __ \ ____ / /_ / /_
___ _____ / /_
/ /_/ // __ \ / __ \ / __ \/ _ \ / ___// __/
/ _, _// /_/ // /_/ // /_/ / __// / / /_
/_/ |_| \____//_.___//_.___/\___//_/ \__/
+------------------------+---------------------+
| Robbert J. van Herksen /
PA3BKL |
| Soesterberg, NL (Lat:52.11726 Lon: 5.29761) |
+------------------------+---------------------+
hi
david,
i got your email address through your website.
i see that you are quite familiar with hardware
interfacing and i wonder if you can give me some pointers with regards to a
problem i am currently facing.
i have a hardware device, which is capable of
generating analogue voltage pulses. I actually wanted to monitor these
impluses from a pc. hence, i am thinking of using an
IC to convert the analogue signal to an rs232 sequence to be fed into the
serial port of a pc.
do you think this is possible?
i have looked through some websites and i came
across some ICs such as TLC548 (texas instruments) and MAX187 (Maxim) that
can seem to do the job.
can you give me some opinions?
Thank you very much for your assistance!!
Regards,
Jen Wee (
hola estaba viendo tu trabajo de
adquisicion de datos sobre paraport.
y vi que querias hacer algo similiar pero sobre
rs_232 alguna suerte?
yo estoy buscando informacion sobre el mismo tema.. ejemplos
y esas cosas.
si encuentras algo me avisas gracias..
Fernando
Dear sir,
we have seen your page on geocities website. we
need the
followig information
1. Proximity Switch sensing circuit: This switch is a bought out
item for us, kindly suggest a suitable sensing circuit.
2. Thermocouple Circuit: kindly suggest a suitable temperature
sensing circuit.
3. DAQ using parallel port: Kindly send the circuit details.
Regards,
Naresh
NSDRC,
Hola que tal?, estuve
viendo tus proyectos y me pareciron muy interesantes y bien hechos,
agradeceria que me mandaras algun mail cuando tengas novedades...
Gracias. Ivan Sanchez (Chihuahua, Chih., Mex
Hello
David,
Wishing you and your loved ones a very Merry Christmas and a happy &
prosperous New Year 2004.
How are things going with the moisture sensor?.
Best regards,
Andrew Isaac
hola soy un estudiante de
ingenieria en sistemas de
mexico vi su pagina y me parecio sumamente interesante
la adquisicion de los datos, no se si tendra alguna
otra pagina donde pueda ver mas a detalle o
explicaciones para un probable proyecto escolar...
gracias por su atencion!
Estimado Ingeniero.
He visto con mucho interés su página en Internet, muy buena,
congratulaciones.
Estoy implementando su display de tres digitos, para usarlo
como pirómetro, pero no encuentro la forma de conectar una termocupla K al
ADC0831.
Si está a su alcance esa información,o donde encontrarla, sería tan amable de
hacermelo saber?.
Atentamente:
Luis A Diaz.
PD. Le escribo en castellano por ser esta nuestra lengua materna
Hi.
1- PC- Based DSO (on pci or external)
Sampling Rate & Resolution 14 Bit
Resolution 50MS/s sampling on 1 channel , 25MS/s simultaneous sampling
on 2 channels
Bandwidth 25MHz
2- Dielectric Plastic Sewing Machine
Regards
Sayed Madjid Samieefar
Tehran - Iran
I
am very interested in the proxymity swicth ,what i
want to know is that, can human body trigger this switch ?
--
Dear sir
thank u very much ,I have a master in computer eng.
,I did befor some circuits related to pulse induction
because this is my hoppy , but I found that it is
diffecult to deal with a huge coils , what I am going
to do , I am trying to find a sensor that send pulses
and other one used to recieve the reflected signal so
I can write the software to analyize the signal ,I
search the internet but I can not find like this
sensors , I hope you can ask your frinds for help
thanks
Dear Mr. David,
I went through your site and it is really good. I
wouldlike to collabarte with you for making some software would you be interested ?
I have plans to make a VB software
which communicates with Modbus protocol, I know many people have developed
it, but I am interested to do it. Please let me know about your intrest.
with Best Regards,
Kumarraswamy.M
hi..
thanks
for your advise..base on your question.
1. Yes.. I had tried link it to PC using a null modem to read,
send sms.. its work.
2. I have
the PIC programmer hardware and software.. I also
have MPLAB..
3. but I can’t understand what do you meant by optical (ir2)
or electrical and isolated.
I had
read your RS232 programming using PIC 16F32. it’s
nice and interesting. I can understand that because I had learned how to
programmed and use PIC 16F32. I just want to know..
NOKIA 30 used RS 232 as connection to electrical device or PC. Can I use http://www.oocities.org/the eijing dragon/rcpc.htm as reference for my
project? And..can I replace PC control to NOKIA 30
gsm connectivity? (sms control)
regards;
syarfa..
thanks a lot….
hi
how r u
?
im adel
nice to
meet u
im
waiting for zip file and softwares
i hope if
you can send the vb6 or vb5 examples
to
inerface with eny hardware useing lpt port
thannnnnnnnnnnnnnnnnnnnnnkk uuuuuuuuuuuuuu
Hi David
I am interested
in learning 89c52 projects and interfacing it
with remote control devices.
i am still new to this assembly programming, but i
am doing a project now on
capturing DTMF from telephone line and its like a billing system.
I am not a good reader so i like to get knowledge from looking at projects
and assembly codings
i like to learn c programming too for 89c52
If you have time to help me out with codings pls reply and i like to have
simple easy to make remote control circuits if u have
Thanking you
Lasantha Dissanayake,
Sri Lanka
Dear Mr. David,
I went through your site and it is
really good. I wouldlike to collabarte with you for making some software
would you be interested ?
I have plans to make a
VB software which communicates with Modbus protocol, I know many
people have developed it, but I am interested to do it. Please let me know
about your intrest.
with Best Regards,
Kumarraswamy.M
Automatic Control Systems
Mobile : +91-98807 64334
-----------------------------------------
Armax automation Pvt. Ltd., # 9, II nd Floor, 5 th Main, R.M.V II nd Stage,
New BEL road, Bangalore – 560094, Karnataka, India.
Ph: + 91-80-23510070, Fax: + 91-80-23510069
URL: www.armaxindia.com
Dear
export manager,
We have the pleasure to inform you that your name and address have been passed
to us through yr. website with the information that you are interested in
importing.
We would be glad to make a good relation between us. So,
please send us your final price list with max. Discount applied on it and
also complete copies from your technical data catalogues for all yr. products
direct to our address soon to can study it
we need now yr. best price foe:
limit switch , photocell
photoelectric switch
Dear Mr. Jesus David Jimenez Loza,
Hi Mr., i'm Mr Kang From Malaysia. I had saw some of your project on your
webpage and i quite interested with the circuit design of the 'Oscilloscope,
Frequency meter and Spectrum Analyzer Based on a low End PC', and here, i
have some questions on your project and hope you can give some help on it.
My questions is:
1) what is the VOLTAGE range for the analog input signal?
2) the circuit interfaced with
the pc through the parallel or series port?
3) is that the complete diagram
you posted on the page? or we still need to add some
additional resistors between the conection of the 74138 and ADC0804?
4) are the pin
15,14,13,12,11,10,9,and 7 of the 74138 connected together? because according to the schematics, all those pins are
open.
5) is the program run in DOS?
This is all my questions for now, for your information,
i'm now finding an pc based OSC circuit (self made) to shows my instrument
data on the PC, the experiment that i'm doing now is an hot wire anemometer
and the interface (data and PC) is the last part of my project.
I'm glad that i found your circuit, its
really give a lot of help on my interface part. Hopefully i'll get your reply
and help on my question as soon as possible!!
Thanks
Kang Jer Haur
(UTM, Malaysia)
hi
I need help to retrieve data drom the adc chip and
transfer out of the rs232 port.
Currently i'm using ADSP2189M. it
is a dsp board. But after a few months of trying to write the program but to
no avail.
Could you help me? I juz need to take data from any
adc to rs232.
Best Regard,
Sam.
Singapore
Hello jesus my name is Andre Gerritsen / PE1PPE
from
the
I am
sending you this message, because I want the
assembly
code and the schematic of the three digit
analog
meter i want too make the meter for my
powersupply as a voltage and current readout .
And this
is a learning project for me because i am trying
to
understand the assembly code.
Thanks
for reading my email,
greetings
from
a.n.g.gerritsen@wanadoo.nl
Andre
Gerritsen
PE1PPE
The
Dear David,
Hello this is kumar from
Your help is highly appreciated, please do the
needful david.
Regards
Kumar
por favor me
podes enviar el circuito referido a "This is the ISA bus DAQ card.
You can built it for $7. Circuit diagram will
SOON be here, meanwhile you can request it by
e-mail."...o si tenes algo armado para el bus PCI...gracias
Apreciado amigo Jesús sus realizaciones son muy buenas.
Estaría interesado en el proyecto de control con esa tarjeta ISA. Lo que es
el hardware, lo manejo con relativa eficacia, no así el software
donde ando como los bebés en cuatro patas. De esta suerte le
agradecería me enviara usted tanto los schematics, el software Ephestus
y como lo logró (lo mas tutorial posible). Agradecido de antemano.
Getulio.
Dear David Jesus
Do you have a program and circuit for USB 2.0
interface with a microcontroller (8085 or 8051 or 89C51) ?
thanks
Roy
Please
don’t get me wrong, I looked at your 3-phase project, and was wondering why
you were converting AC to DC and then fed it through the motor. Wouldn’t it
be better to switch the AC to produce the 3-phase needed to run the
motor?
What I am
doing as my current project, is to build a 3-wheeler motorcycle. I am looking
at an electric type, but starting to run into some basic problems. Motors.
What type would be the best. AC or DC ? I was looking at DC motors for the reason that a DC
motor can be used as a generator when needed and as a motor also when needed.
An AC
motor was also looked at, but to make an AC motor into a generator will take
some doing.
Any
thoughts?
Electric
cars are good for the local towns and cities, But are not good for the
mountain town that I live in. Even hybrids do not fair as well. And, If you
look at what I do, electric trucks will never work unless you add a fuel
engine.
What I am
thinking is a small gas engine in idle mode while one drives around town, but
kicks in when you need extra power for going up hills and getting on
freeways. Of course, going downhill, the motor should switch to generator
mode, charging cells and acting as a brake.
Am I out
there too far??
Doug
Vandegrift
Pinball
and other coin operated games.
Hi,
I'm Dogac Basaran form
interface ADC0831 to PC serial port. Can you give me
some clues on the subject?
Thanx,
Dogac