26-07-2012, 02:31 PM
Centrifugal fish autofeeder
[attachment=29074]
Working System:
The circuit is using regular timer (IC 555) sending pulse to 2 cascaded
counters of CMOS 4017. The output pin from the last counter is then
fed to the capacitor and-relay in series. (Remember: a relay owns its
own resistance) which consequently trigger the relay for some time to
turn on mechanics section. After the capacitor is about to be fully loaded,
the relay shuts off. From here we could figure out that the bigger the capacity
the longer the relay connects which then causes the motor works to expel
pellets centrifugally. The resistor functions to unload the capacitor so that the
capacitor is then ready to be loaded for the next cycle.
Mechanics section
All you need for this section are tape motor 12 V + the ring (plastic or brass),
transmission cable, 2 plastic bottle (as shown on the pic), some glue to stick
the motor, a coin (about to reach the bottle neck diameter, cutter, match,
and solder. For short, try making it yourself following these pics (try to develop
yourself about my brief idea):
[attachment=29074]
Working System:
The circuit is using regular timer (IC 555) sending pulse to 2 cascaded
counters of CMOS 4017. The output pin from the last counter is then
fed to the capacitor and-relay in series. (Remember: a relay owns its
own resistance) which consequently trigger the relay for some time to
turn on mechanics section. After the capacitor is about to be fully loaded,
the relay shuts off. From here we could figure out that the bigger the capacity
the longer the relay connects which then causes the motor works to expel
pellets centrifugally. The resistor functions to unload the capacitor so that the
capacitor is then ready to be loaded for the next cycle.
Mechanics section
All you need for this section are tape motor 12 V + the ring (plastic or brass),
transmission cable, 2 plastic bottle (as shown on the pic), some glue to stick
the motor, a coin (about to reach the bottle neck diameter, cutter, match,
and solder. For short, try making it yourself following these pics (try to develop
yourself about my brief idea):