If it is an assignment that needs solution, then rid on with it. But if needed for implementation, i will advise you buy dragon tamer's ideal. I only disagree with time relation given by dragon tamer as the time depends on +ve & -ve going threshold voltage of the gate.
The circuit as draw is just hard for me to read. A circuit similar to this one is what I believe Dragon Tamer is suggesting. The CD4093 is a quad schmidt trigger NAND gate. The timing is shown in the drawing.
Hello guys ?
I am in very big problem please help ?
This is my 10 minutes timer circuit...
I have assembled on breadboard but switching on the led doesnt glow as it is set by 10 minutes timer after 10-15 minutes also it is not glowing..
As in circuit it should glow after 10 -12 minutes. but it is not glowing...
please................... friend help ?
thanks in advance...
yusuf, you were told in your other thread using this very same circuit that the circuit is not a very good circuit. Other designs using the very same chip were suggested. However, in the drawing as they mention Gate #3 is unused. Gate #3 should have pins 8 & 9 both tied to ground. I don't see that in the drawing? I am not sure about the rest of it.
Also pins 1 & 2 should be tied to the 6 volts. I don't see that shown. I really suggest you go back and read your other thread. This circuit apparently assumes the person building it is well versed in circuits of this type.
Friend thanks for reply ? Here is full circuit diagram of automated tank filler circuit..
which i was building ..
but I thought to test both circuit seperately which is control and timer..
So I was building timer circuit and I didn't get response...
so please suggest a good advise ro how to check timer circuit seperately...
Friend thanks for reply ? Here is full circuit diagram of automated tank filler circuit..
which i was building ..
but I thought to test both circuit seperately which is control and timer..
So I was building timer circuit and I didn't get response...
so please suggest a good advise ro how to check timer circuit seperately...
If it is an assignment that needs solution, then rid on with it. But if needed for implementation, i will advise you buy dragon tamer's ideal. I only disagree with time relation given by dragon tamer as the time depends on +ve & -ve going threshold voltage of the gate.