8 way relay board

[Vedran]

Hello!

This questions are about "8 way relay board " project!!!

Where to put:
1 x 1N4004 Diode -> i can't see it on pcb?

What is:
1 x 0.01uF (approx) Green Cap -> is it block capatitor -II-
and where is it on pcb?

What is:
1 x 1 amp Bridge Rectifier -> is it Greatz???

I would like that you send me schematics so i can see better where which part is connected... this way it is not so clear to me!
I would like to make this interface so much! Please explain
it a little more!

I don't understand this part of pcb???
Please help me to figure it out what parts are here....
Thanks!!

Project Link: http://www.electronics-lab.com/projects/pc/005/index.html

[mixos]

There must be a typographical error about 1N4004. It's place is where 1N4001 is on pcb. In other words on pcb 1N4001 -> 1N4004.

The 0.01uF capacitor is near 7812, the green one. It's a tantalium or ceramic one. Nothing special.

The 1A Bridge Rectifier is nothing special either. It's just a plain 1A Bridge Rectifier like below:


The botton one fits better in pcb.

I am sorry, but there are not schematics available.

I attach you the part that you don't understand. Is it clear now?

[Vedran]

Thanks you explain things excelent!
I get it all... just one more little question...

Where I must conect these + - 12v points?
Or they are not connected?
I am already shame for buging you so much :-[

Thanks! ;)

[mixos]

You are welcome Vedran, don't be shame :)

At the + - 12v points appears such a voltage if your power supply work ok. You don't need to connect anything if you plug at the Power Socket the output of a power transformer of 12V.

Otherwise if you don't connect a tranformer and you have a power supply of 12V that don't need a rectifier (has already) you can connect it at + - 12V points without connecting nothing to the Power Socket.

I other words this is to alternative power the circuit from an already rectified source. Also you can take the + -12V from there if you want to use them somewhere else and the amperage is sufficient.

[Vedran]

Thanks!!
I think all is clear now to me!
I bought today 2 relays for a start and other parts!
I will just have to rebuild PCB a little cause I have Schrack
relays that are diferent from those ones on the picture!

Can't wait to see it working.... ;D

This site rules!!!!

Bye :D

[buctuong]

i has made th 8 way relay board,it's ok
but i want to know source code of the software
because i want to develop it
thanks !

[hassan1980]

Hi, There

For the project for 8way relay board. Can you made it to control more than 16 Devices?

if you use decoder it is very good this mean that you have to use four outputs in the parallel Jack for the PC

I am need this, Would you please help me?

Please Write to me  soon

[ante]

Hi hassan,

With 8 relays you’ve got 8 bits, sure you can control more than 16 devices!

[trampe]

Try this software for the relayboard.
http://www.kemo-electronic.com/de/module/m125/index.htm  (RelaisTimer11).
You can with a decoder control up to 255 Relays.
Have fun

[ArabicEdison]

Q1:

You can with a decoder control up to 255 Relays.
Have fun

hii
i'm arabic man , by chance enterd to this form
while i secking(searching) about  control up to 255 Relays
if fact ,I can not understand the languge on the link

Try this software for the relayboard.
http://www.kemo-electronic.com/de/module/m125/index.htm (RelaisTimer11).
You can with a decoder control up to 255 Relays.
Have fun

4 that . i hop any one help me
please msg me fast
=================
Q2:
i can make software on VB to controling  8relays , "useing input.dll" on xp windows|
but sometime the software can not control a circuit
more arabic forms says the controling under windows xp is not work ok!

how i can make a good software can runing under all windows (98/2000/xp/2003)
please msg me (pics of circuit )fast
please
:'(

[Staigen]

Hi there ArabicEdison

I can not understand the languge on the link

If you click on the "home" button you can change to an english version of the site( i hope you understand the english language) ! ;D

//Staigen

[the lover1]

i want to know the dimension of the PCB in order to make one
plase type it in  mm
thanks

[ziko]

i build the pcb but when i connect to the parrarrel port all the 8 relays stay on, the program have no effect on the output.
i use uln2804a and not iln2803 as in the list???
thanks for all help

iko

[audioguru]

The inputs of a ULN2804A are not designed for 5V logic from a computer. It is designed to be driven by Cmos logic that uses a higher supply voltage.
I copied this from the datasheet:

[Herman the German]

i want to know the dimension of the PCB in order to make one
plase type it in  mm
thanks

1 inch equals exactly 24.5mm. Figure the numbers in mm accordingly, lazy guy!