George L.
New Member
Hello,
I am going away soon and need to make a device to feed my fish once a day while I am away.
I have experimented and tested...I am close to finishing but now I am stuck. The image attached is what I have on my breadboard, my own design. This is how it works.
The 555 pulses to the 4040 binary counter. On the 4040 IC, there are four outputs that all light up together at a certain time interval, when all the outputs are high, it triggers the AND gate to give a high output and the gate trigger a relay, which will turn a geared motor. The motor is what will feed the fish. (There has got to be an easier way!)
When I change the value of the 555 cap to a high value, the time it takes to turn on the relay is longer (can be calculated).
This is the problem, the circuit will trigger every 24 hours, but then the relay will stay on for a very long time also. I need the relay to have a short 1 sec. pulse evry 24 hours, I need a time delay! I have tried some things and just can't get it to work.
An option would be to pull the reset high after the relay is on for one second, this would reset the timing and it would start over.
Could someone please guide me or help me out with letting the motor only stay on for 1 second, then reseting the circuit, I think this is the easiest way.
I really don't want my fish to die from starvation :cry:
Would really appreciate some help,
thanks
George L.
I am going away soon and need to make a device to feed my fish once a day while I am away.
I have experimented and tested...I am close to finishing but now I am stuck. The image attached is what I have on my breadboard, my own design. This is how it works.
The 555 pulses to the 4040 binary counter. On the 4040 IC, there are four outputs that all light up together at a certain time interval, when all the outputs are high, it triggers the AND gate to give a high output and the gate trigger a relay, which will turn a geared motor. The motor is what will feed the fish. (There has got to be an easier way!)
When I change the value of the 555 cap to a high value, the time it takes to turn on the relay is longer (can be calculated).
This is the problem, the circuit will trigger every 24 hours, but then the relay will stay on for a very long time also. I need the relay to have a short 1 sec. pulse evry 24 hours, I need a time delay! I have tried some things and just can't get it to work.
An option would be to pull the reset high after the relay is on for one second, this would reset the timing and it would start over.
Could someone please guide me or help me out with letting the motor only stay on for 1 second, then reseting the circuit, I think this is the easiest way.
I really don't want my fish to die from starvation :cry:
Would really appreciate some help,
thanks
George L.