I need to ask whether is this completed circuit? Majority working after doing it? Any errors from this circuit diagram? I followed every circuit connection, but doesnt work.

http://www.electronicsforu.com/efyli...9_cardlock.pdf

 

Hi,
Do you have all 7 opto detectors?, the circuit shows 3, but it requires 7.

Do the LED's 1 thru 7 indicate correctly?

Are the power supply voltages within the range specified?

As you havn't said how is 'dosn't work' its difficult to give a meaningful answer.

Eric

 

ya, i carefully checked the circuit. Instead of 3, i bought 7 of them

my term of doesnt work, is it that will guanrantee its working?

 

Most circuits on that Indian website are very old and don't work.

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Uncle $crooge

 

can anyone tell me how to make the circuit work?

 

It should work as shown. Why you'd want to use this design is another question. For one thing it uses a 40 Watt light bulb. Talk about idle current! I would also think that the melody-buzzer would get annoying after a while.
What does it do right now?

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--- The days of the digital watch are numbered. ---

 

is there possible to change from AC appliances to DC appliances?

 

Makes no difference, the loads are switched be relays - just make sure your relays are suitably rated.

And I agree with everyone else, that's an absolutely horrible circuit!.

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