diy aquaponics controller | Electronics New fish lever switch

00.44 in Aquaponics, electronics, fish, lever, new, switch

diy aquaponics controller

I was wandering around wondering in an electronics store today, and found a new, even better switch  for my fish activated lever on my demand fish feeder.

It looks like this.

The one on the left is what Im using now, and I had to glue some tubing on it so that it looked more like the one on the right.

The one on the right already looks absurd without my having to glue anything to it at all.

I have no idea why someone would need an inch long press button switch.

Unless they were using it as a fish lever.





I mentioned to the owner that the switches could be triggered with sideways pressure.

He didnt know that.

It seems the manufacturer didnt intend it, and it is just a pleasantly useful side affect of the manufacturing process. .





120 Things in 20 years - Getting ever close to filling up my brain with new facts about electronics and absurdly long new fish lever switches for my aquaponics demand feeder.


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diy countertop aquaponics | Electronics Aquaponics Demand feeder lever

09.15 in Aquaponics, demand, electronics, feeder, lever

diy countertop aquaponics

Probably the most difficult single thing to deal with in making my demand feeder has been working out the lever.

But as usual I called upon chance to solve it for me.

Thanks chance.

For some reason I remembered playing with a switch I bought when I was making the first version of this demand feeder. The switch was one that is a button, and turns on then off again after you lift your finger.

Its sideways click seemed nice to the touch.

The one pictured (centre front) is the same, but is on an old circuit board. I cant find my original version.



Its quite long for a momentary switch.


The interesting thing about these particular, particularly long momentary switches, is they they do their switching thing if you tilt the button to the side rather than just press it. I just tested this one and it works.

They also work if you press it, but its the sideways switchyness that interests me. It should be perfect as the lever the fish hit, because they can hit it from any direction and it should trigger.




Now all I need to do is figure out which brand they are, and if they all work like that. It might be the case that only some of them do this. It might be a manufacturing error rather than a feature.

Perhaps manufacturing error is too harsh.

Perhaps manufacturing  tolerance would be better.

Either way, I might be able to use it.



120 Things in 20 years - As luck might have it, for the next few days, you might find me in electronics stores with a multimeter, trying to find a switch for my electronic, aquaponics demand feeder lever.



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diy commercial aquaponics plans | Electronics Aquaponics Demand feeder fish lever build

01.31 in Aquaponics, build, demand, electronics, feeder, fish, lever

diy commercial aquaponics plans

I spent some time in an electronics store testing long buttoned momentary switches.

They all seem to work when you tilt the button to the side as well as when you press the button normally. Perhaps they are designed to work that way after all.

Thanks button maker.

I had a bit of a breakthrough with the entire lever, and not just the switch part. I found this fishing float had a white plastic bit that almost fit over the momentary switchs button.

Thats the switch lower right.

The white plastic thing was hollow, but needed a slight enlargement with a hand held drill.

The button went in with a snug fit, and the white thing was really their just to give me some surface area glue onto.

The new lever incorporated a second fishing float as the stem, and as a nice bulb for the fish to hit.

The float stem has a bit of flex to it, so it should be forgiving if a fish hits it hard.

It looked lie this when built.

I glued it in place with super glue, and held it while it dried with what to me looks like a naked chicken with a fist for a head.

So now my device looks like this.

It also works.

I turned it on, and while I was putting a cover over the fish tank, the bigger of my two fish hit the lever and got a feed.

I did have the camera running, but the video was too dark to post, but the switch and lever worked perfectly.

I count this as a success!











120 Things in 20 years suggests you never try to take your electronic aquaponics demand feeder on a plane with you, unless you feel like explaining it for a few hours.

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