Arduino Forum

Using Arduino => General Electronics => Topic started by: Bobbyfox2 on Oct 22, 2012, 05:58 am

Title: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 05:58 am
Q1... What is the voltage and current is your door strike

Q2... I am having trouble seeing where the prototyping board connects to the id-12 could you please help me out

Q3... I am also having trouble seeing how the buzzer connects up could you please help me

Q4... Could you please tell me if the transistor that i have will work. Here is the link: http://www.jaycar.com.au/productView.asp?ID=ZT2468

Q5... Is that a diode just behind where the door lock connectors are if so could you please tell me what diode i need

Q6... Could you please tell me what resistor or resistors i need could you please tell me

Q7... Could you also please tell me where everything goes on the prototyping board if you could do that it would be very much appreciated

Q8... could you also please tell me what D8, D7, etc.  mean
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 06:45 am
would this transistor be better

LINK:  http://www.jaycar.com.au/productView.asp?ID=XC4244
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 22, 2012, 06:49 am
My door lock uses 24V.
Thanks for asking.

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 22, 2012, 07:25 am
I think this question was addressed at me, based on various personal message I have got recently. :)

In particular with reference to this project:

http://www.gammon.com.au/forum/?id=11283

Quote
Q1... What is the voltage and current is your door strike


12V. Not sure of the current. Still, it's the current of your strike that is important, right? A few hundred milliamps from memory.


Quote
Q2... I am having trouble seeing where the prototyping board connects to the id-12 could you please help me out


(http://www.gammon.com.au/images/Electric_Strike_Schematic.png)

As shown above.

Quote
Q3... I am also having trouble seeing how the buzzer connects up could you please help me


As shown in the circuit.

Quote
Q4... Could you please tell me if the transistor that i have will work. Here is the link: http://www.jaycar.com.au/productView.asp?ID=ZT2468


That should be OK.

Quote
Q5... Is that a diode just behind where the door lock connectors are if so could you please tell me what diode i need


As on the circuit. I used a 1N5822 (Diode Schottky 40V 3A) to protect the circuit from the coil.

Quote
Q6... Could you please tell me what resistor or resistors i need could you please tell me


Are you having trouble reading the circuit?

Quote
Q7... Could you also please tell me where everything goes on the prototyping board if you could do that it would be very much appreciated


Wherever you want to put it, it isn't critical.

Quote
Q8... could you also please tell me what D8, D7, etc.  mean


They refer to the digital pins on the Arduino.
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 22, 2012, 07:26 am

would this transistor be better

LINK:  http://www.jaycar.com.au/productView.asp?ID=XC4244


Looks about the same. Looks like it has the pull-down resistor already installed.
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 08:26 am
THANK YOU NICK :)
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 08:46 am
What does the triangle facing down on the buzzer mean (schematic)
Title: Re: Rfid Door Lock
Post by: Groove on Oct 22, 2012, 08:48 am
It's a "stop" sign.
Title: Re: Rfid Door Lock
Post by: Grumpy_Mike on Oct 22, 2012, 09:01 am
It is ground, all those points are connected together.
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 10:33 am
How do you connect to ground
Title: Re: Rfid Door Lock
Post by: Groove on Oct 22, 2012, 10:58 am
Use a big copper spike.
Are you being serious?
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 22, 2012, 10:59 am
how do i ground to the board
Title: Re: Rfid Door Lock
Post by: AWOL on Oct 22, 2012, 11:09 am
Ground, zero volts, earth.
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 22, 2012, 11:28 am

how do i ground to the board



Are you sure you want to do this?

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: Grumpy_Mike on Oct 22, 2012, 12:45 pm
Ground is one of the terminals on the arduino bord. It is marked GND.
All points with that triangle must have a connection to that point.
So join all the triangles together and then connect that to the GND pin.
Title: Re: Rfid Door Lock
Post by: Groove on Oct 22, 2012, 02:26 pm
It's looking more and more like a stop sign to me now.
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 08:29 am
Whats the IRL234N and how does it connect up
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 08:31 am
can you please take some more photos

Thanks
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 23, 2012, 08:36 am
It is deployed now.

The whole idea of publishing the circuit was you could make one yourself. You aren't supposed to be trying to follow my exact layout.

Look, I am doing this stuff as a free service. At Adafruit they take lots of nice photos and step by step instructions. But they are getting paid. I'm not.

I seriously, seriously recommend you study how to read circuit diagrams. Your questions suggest you don't know how to. That's not a criticism, you can address that by learning how to do it.
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 23, 2012, 08:36 am

can you please take some more photos

Thanks


Photos of... what?

Do you know what spoonfeeding is?
http://www.thefreedictionary.com/spoonfeed

Look for  number 2.

Did you get it?
;)

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 08:41 am
I'm making my own top board with my cnc could you please take another picture where the resistors connect up to the transistor
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 23, 2012, 08:46 am
No. It is in the roof. I can't get to it easily.

I suggest you read the circuit and work it out from there.
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 23, 2012, 08:49 am
Are you asking for a schematic or photo? And you must be talking to Nick, right?

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 08:57 am
Where did you get your transistor from
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 09:02 am
I don't understand this i looked all over the internet for it can you please help me with this this is the last thing i want help

(http://)
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 23, 2012, 09:06 am
Have you tried http://www.eBay.com ?

What transistor are you looking for?


Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 23, 2012, 09:09 am
http://lmgtfy.com/?q=irlz34n

26,000 matches.
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 23, 2012, 09:12 am
Look, you don't have to use that exact one. It's an N-channel MOSFET. Find one with similar ratings.
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 09:23 am
is the middle pin the gate
Title: Re: Rfid Door Lock
Post by: AWOL on Oct 23, 2012, 10:10 am
Is Google broken where you are?
Title: Re: Rfid Door Lock
Post by: Grumpy_Mike on Oct 23, 2012, 10:18 am
Quote
is the middle pin the gate

No it is the drain.
Look at the data sheet, the last page.
Lay it flat on its back with the hole at the top.
Left pin Gate
Middle pin drain
right pin source
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 23, 2012, 10:24 am

Whats the IRL234N and how does it connect up


IRLZ34N - that's a Z not a 2!

Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 23, 2012, 10:38 am
which website are you on and which data sheet
Title: Re: Rfid Door Lock
Post by: AWOL on Oct 23, 2012, 10:40 am
http://www.irf.com/product-info/datasheets/data/irlz34n.pdf
Straight from the horse's mouth.
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 23, 2012, 10:41 am

which website are you on and which data sheet


Pick one.
http://search.datasheetcatalog.net/key/IRLZ34N

Philips has the easiest for you...

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 25, 2012, 09:55 am
Hi Nick

How many k or ohms the resistors worth
Title: Re: Rfid Door Lock
Post by: AWOL on Oct 25, 2012, 10:14 am
How many does it say on the diagram?
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 25, 2012, 11:49 am
Hey

Check the schematic on page 1
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 25, 2012, 12:01 pm
Components are named, which one is the problem? R1 could be missing something, maybe author would check the correct value. Or it could be just 10.

Bobby,
Be more specific with your questions.

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 25, 2012, 12:08 pm
It's 10 ohms.

10 on its own is 10. (What do you think it meant?) If you go 10 meters that is 10 meters. If you go 10K meters that's 10 kilometers. It's pretty straight-forwards.
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 25, 2012, 12:14 pm

How many k or ohms the resistors worth


Let me ask you a question. R2 is labelled 10K. Do you think that is 10K ohms? Or if not, what do you think it is? I'm interested.
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 25, 2012, 12:43 pm
Hi Nick will the system work with this here is the link

Link: http://www.ebay.com.au/itm/Atmega328P-Mega-328-Arduino-compatible-UNO-2011-USB-cable-00960-/251168841798?pt=LH_DefaultDomain_15&hash=item3a7ad46046
Title: Re: Rfid Door Lock
Post by: Bobbyfox2 on Oct 25, 2012, 12:45 pm
Whats R1 then
Title: Re: Rfid Door Lock
Post by: dxw00d on Oct 25, 2012, 01:03 pm

Whats R1 then


See reply #39.
Title: Re: Rfid Door Lock
Post by: Groove on Oct 25, 2012, 01:21 pm
Quote
Whats R1 then

It's a r-e-s-i-s-t-o-r
Title: Re: Rfid Door Lock
Post by: Grumpy_Mike on Oct 25, 2012, 01:22 pm
Quote
It's a r-e-s-i-s-t-o-r

That won't go through Google translate.  ;)
Title: Re: Rfid Door Lock
Post by: GaryP on Oct 25, 2012, 02:27 pm
It's a troll...

Cheers,
Kari
Title: Re: Rfid Door Lock
Post by: nickgammon on Oct 25, 2012, 10:11 pm
Enough of this idiocy.

Thread locked.