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Author Topic: Problem with Simple Keycode Lock circuit  (Read 6616 times)

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kam

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Problem with Simple Keycode Lock circuit
« on: August 23, 2011, 20:23:50 PM »
Circuit page: Simple Keycode Lock
Reference: Comment by Suryansh , 22 August 2011, 14:45:17
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Attached on this message i have the schematic you use with the 4072 chip. It is the same like the original .

So, you need to do some tests with LEDs. You will put an LED on these positions:

IC1A [CD4013] Output .NOT.Q [Pin 2]
IC1B [CD4013] Output .NOT.Q [Pin 12]
IC2A [CD4013] Output .NOT.Q [Pin 2]
IC2B [CD4013] Output .NOT.Q [Pin 12]
IC4A [CD4072] Output [Pin 1]

Then, i want you to tell me what happens to the LEDs when:
1. You press button D1
2. You press button D2
3. You press button D3
4. You press button D4
5. You press reset

Before, make sure that you have enough decoupling capacitors on the supply of the breadboards. At least one 1uF electrolytic and one 0.1uF ceramic (or other).
Finally, post here some pictures from the board.

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #1 on: August 25, 2011, 16:34:05 PM »
@kammenos ;
Thanks 4 ur effort & interest I'll make u know as soon as possible ....
I am trying out the ckt as u said....???? thanx

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #2 on: August 25, 2011, 17:13:51 PM »
This is what my ckt looks like (I'm using Circuit Wizard).....
Is this ok.....

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #3 on: August 25, 2011, 17:18:25 PM »
the LEDS r supposed to be connected between (pin:2,12,2,12 and ground respectively).
Is it Correct????

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #4 on: August 25, 2011, 17:43:22 PM »
The attached video is the simulation of my ckt...using Circuit Wizard
as soon as I run it ,The ICs:
                                           IC1A [4013B]
                                           IC3C [4081B]
                                           IC3D [4081B]
Blow away as shown in the video
and thus the keys D1,D2,D3...are of no use...
and the o/p works with only D4 and ERR irrespective of the other keys.....
Thanx in advance.....

kam

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Re: Problem with Simple Keycode Lock circuit
« Reply #5 on: August 25, 2011, 21:21:47 PM »
try to replace the 47K resistors with 10K. and does this simulation explain why this blow happens??? That is so weird! :-\

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #6 on: August 26, 2011, 17:13:23 PM »
Hi kammenos:
Would u plz install this software....and asist me &help me out of this mess....plz
I m running out of time...I have to submit the circuit and data sheet of this project in the comming Monday i.e.29th...
You said to add LEDs!!!! That means all connections are same and I have to add leds betwn the respected Pins and GROUND,correct ????
I have also attached the file for this ckt if u anyways download this software.....
.
.
and that Exploding thing is like,I right clicked on the ICs and unchecked the 'Explod' box and the exploding disappeared....weird :-\
thanx 4 ur support Sir :)
« Last Edit: August 26, 2011, 17:31:49 PM by Suryansh »

kam

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Re: Problem with Simple Keycode Lock circuit
« Reply #7 on: August 26, 2011, 18:27:31 PM »
the LEDs are connected to the ground through a limiting resistor, for example 1KOhm. Which software do you use? Is it free?

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #8 on: August 26, 2011, 18:54:44 PM »
Its Circuit Wizard and ya u can get a free crack

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #9 on: August 26, 2011, 19:10:14 PM »
Wait I m uploading it here itself.with all crack and everything

kam

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Re: Problem with Simple Keycode Lock circuit
« Reply #10 on: August 26, 2011, 19:27:32 PM »
no please, no cracks/serials. does it have a lite version or a trial period?

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #11 on: August 27, 2011, 08:55:58 AM »
Yes It has a Demo version here....http://www.new-wave-concepts.com/downloads.html
But u cannot simulate ur ckts in this version.... that's the problem!
May I ask ,why no cracks???????

can we simulate the ckts in EAGLE????

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #12 on: August 27, 2011, 09:43:35 AM »
Wait I Got a Lite education version of it....no crack nothing just run the exe..and its done
1.I have attached the rar file and
2.My ckt

kam

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Re: Problem with Simple Keycode Lock circuit
« Reply #13 on: August 27, 2011, 10:48:53 AM »
have you test the circuit on a breadboard?

Suryansh

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Re: Problem with Simple Keycode Lock circuit
« Reply #14 on: August 27, 2011, 11:32:00 AM »
I have tested it with the LED as my o/p instead of a relay,,,
and as soon as I press the D4 it gets activated no matter the conditions of D1 D2 D3,,,,,
But for resetting sometimes it resets after pressing ERR once and sometimes I have to hold it for a while.



Have you downloaded the SOFTWARE and my SCHEMATIC from the attachment of my previous post...
plz take me out of this problem :-\