Hello,
I would like to know if you guys can assist me, I am building a night activated timer circuit, I have completed the circuit but I have a problem with the operation. I have used two 555 timer IC. One IC as the night activated circuit which the triggers the second IC to be my timer circuit. My problem is, that if a set the timer to only work for eg: 1 hour, the timer does not switch off due to the night activated circuit still providing a trigger signal after the hour. If I place light on the LDR after it triggers, the circuit switches off after the pre-set time. I need to know how to modify this circuit so it will still switch off after the set time although the night activated circuit is constantly providing a trigger signal at night. Also when the trigger signal is off during the day, it must reactivate the same process for the nights and days that follow.
Kindly guide me to rectify my circuit. I would like if the correction can be made at the timer IC circuit so I can still design a more effective night activated circuit using transistors as the trigger circuit.
Thank you.
I would like to know if you guys can assist me, I am building a night activated timer circuit, I have completed the circuit but I have a problem with the operation. I have used two 555 timer IC. One IC as the night activated circuit which the triggers the second IC to be my timer circuit. My problem is, that if a set the timer to only work for eg: 1 hour, the timer does not switch off due to the night activated circuit still providing a trigger signal after the hour. If I place light on the LDR after it triggers, the circuit switches off after the pre-set time. I need to know how to modify this circuit so it will still switch off after the set time although the night activated circuit is constantly providing a trigger signal at night. Also when the trigger signal is off during the day, it must reactivate the same process for the nights and days that follow.
Kindly guide me to rectify my circuit. I would like if the correction can be made at the timer IC circuit so I can still design a more effective night activated circuit using transistors as the trigger circuit.
Thank you.