I need help of this complete circuit.

[xiaobai00]

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.

https://www.electronicsforu.com/efylinux/circuit/feb2003/apr99_cardlock.pdf

 

[ericgibbs]

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.

https://www.electronicsforu.com/efylinux/circuit/feb2003/apr99_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

 

[xiaobai00]

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?

 

[audioguru]

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

 

[xiaobai00]

can anyone tell me how to make the circuit work?

 

[kchriste]

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.

can anyone tell me how to make the circuit work?

What does it do right now?

 

[xiaobai00]

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

 

[Nigel Goodwin]

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!.