RE:THNX 4 INTEREST YOR:"IS IT POSSBLE??I HAVE SAME I/P.

DEAR FRIENDS,

THANK YOU ALL FOR YOUR INTEREST AND CO-OPERATION LET ME REPLY YOUR QUERIES:

1. YES I HAVE ( MAX10 VOLT )VARIABLE VOLTAGE SUPPLY
2. MY PROBLEM IS:

- I HAVE SAME CONTROL VOLTAGE ( SAME TWO TERMINALS)
- I HAVE FIVE CIRCUITS TO CONTROL WITH SAME CONTROL VOLTAGE
- SUCH THAT IF CONTROL VOLTAGE IF ,IT ACTIVATES ONE CIRCUIT IF CONTROL VOLTAGE IS WITHIN (1V TO 2.5V). - AND IF CONTROL VOLTAGE IS MORE THAN 2.5 UP TO 3.5 IT ACTIVATES SECOND CIRCUIT AND SO ON.
- BUT IF FIRST CKT (1V TO 2.5V) SHOULD NOT GET ON IF IT WERE OFF WHEN CONTROL VOLTAGE IS MORE THAN 2.5V AND SHOULD NOT GET OFF IF IT WERE ON PREVIOUSLY. ALSO I MEAN IT MUST NOT HAVE SELECTIVITY OF ON OR OFF IF CONTROL VOLTAGE IS NOT WITHIN RANGE (1V TO 2.5V) SAME FOR OTHER CKTS.

I THINK MOST QUERIES ARE CLEARED


THAKING U

HEMANG

variable supply

hi hemang,

before you can be answered by the people here, pls. clarify the following;
1. you said you have a variable input of 0v to 10volts. do you actually mea
n you have a variable power supply that outputs 0v to 10v?

2. where are you going to apply this circuit?

3. do you need to apply a specific voltage to a particular circuit while supplying other circuits?

Re: IS IT POSSBLE??? I HAVE SAME INPUT AND MORE INDIPENDENT

hemang said:

DEAR FRIENDS,

I HAVE A PROBLEM THAT I HAVE ONE VARIABLE INPUT OF 0VOLT TO 10 VOLT.

NOW SAME INPUT IS GIVEN TO MANY CKTS.NOW WHEN SAY 2V IS APPLIED, I NEED TO HAVE ONLY PERTICULAR CKT TO GIVE HIGH O/P.

ELSE THAT CKT SHOULD GIVE 0VOLT IF INPUT IS LESS OR EVEN GREATER THAN 2VOLT.

CAN U HELP ME SIR?

THAKING U

HEMANG

Click to expand...

sound like you need a comparator cct to do this

It is not physically possible to do what you want. You must have a range of acceptable voltages, for example: 1.99V to 2.01V. What range is acceptable to you?

DEAR FRIENDS,

THANK YOU ALL FOR YOUR INTEREST AND CO-OPERATION LET ME REPLY YOUR QUERIES:

1. YES I HAVE ( MAX10 VOLT )VARIABLE VOLTAGE SUPPLY
2. MY PROBLEM IS:

- I HAVE SAME CONTROL VOLTAGE ( SAME TWO TERMINALS)
- I HAVE FIVE CIRCUITS TO CONTROL WITH SAME CONTROL VOLTAGE
- SUCH THAT IF CONTROL VOLTAGE IF ,IT ACTIVATES ONE CIRCUIT IF CONTROL VOLTAGE IS WITHIN (1V TO 2.5V).
- AND IF CONTROL VOLTAGE IS MORE THAN 2.5 UP TO 3.5 IT ACTIVATES SECON CIRCUIT AND SO ON.
- BUT IF FIRST CKT (1V TO 2.5V) SHOULD NOT GET ON IF IT WERE OFF WHEN CONTROL VOLTAGE IS MORE THAN 2.5V AND SHOULD NOT GET OFF ALSO I MEAN IT MUST NOT HAVE SELECTIVITY OF ON OR OFF IF CONTROL VOLTAGE IS NOT WITHIN RANGE (1V TO 2.5V) SAME FOR OTHER CKTS.

I THINK MOST QUERIES ARE CLEARED


THAKING U

HEMANG

This is generally how to do it, I don't have time to work out the details:

thnx mr.Russlk

thank u Mr.Russlk, for the diagram can i know now that how a simple comparator can handle a range say from 1v to 1.5v? or the two opamp comparators with AND gate is needed?

thnx in advance

hemang

Making the circuit work at 1.5 volts is a challange, but this should work:
The relay may be a custom design, I don't know of a 1.5V relay that will stand 10 volts. The other compartors are window type, you can look it up or, I think an IC is available. Look for "window comparator".