preetijoli
New Member
I want a circuit which would do the following: please help.
This circuit would be an intermediate between the power supply and the concerned device.
In order to avoid tripping in the device, as soon as the power supply is cut off from the device, the device should not function for 3 minutes even if the power suppy is on within 3 minutes of power off.
That is, as soon as power is off, a timer should start working ( without any power supply), ..such that
1. If power comes before 3 minutes, the timer should not let the power supply reach the device until 3 minutes (from the time when power went off) has passed.
2. If power comes after 3 minutes, there should be no delay in the switching on of the device.
Please give me your circuit ideas.
I have few but I m not exactly able to implement them.
This circuit would be an intermediate between the power supply and the concerned device.
In order to avoid tripping in the device, as soon as the power supply is cut off from the device, the device should not function for 3 minutes even if the power suppy is on within 3 minutes of power off.
That is, as soon as power is off, a timer should start working ( without any power supply), ..such that
1. If power comes before 3 minutes, the timer should not let the power supply reach the device until 3 minutes (from the time when power went off) has passed.
2. If power comes after 3 minutes, there should be no delay in the switching on of the device.
Please give me your circuit ideas.
I have few but I m not exactly able to implement them.