5 Minute Water Sensor
Intro: 5 Minute Water Sensor
Something I find really annoying to do is filling up a jug of water. Because the water dispenser lets out the water quite slowly, it takes ages to fill up the jug completely. So I came up with the idea of making a water sensor that will let me know when the jug is full, so I don't constantly have to focus on it.
Because I didn't have very much electronic experience, I made it from trash. To make it I used a cheap kid's toy that I got from a kid's magazine. Basically, it was a small sack that started laughing if you squeezed it. The sound it makes is not perfect, but it works fine. Instead of this any toy that makes a sound when a button is pressed could be used. Happy Meal toys would probably work perfectly.
The two open ended wires are just regular uninsulated 1.5mm wire. I attached it to the toy with some hot-glue (no soldering).
Making this took me just about five minutes. The rewiring was very straightforward, and thankfully there was no soldering needed.
How to make it
Here's a video of the sensor in action:
Because I didn't have very much electronic experience, I made it from trash. To make it I used a cheap kid's toy that I got from a kid's magazine. Basically, it was a small sack that started laughing if you squeezed it. The sound it makes is not perfect, but it works fine. Instead of this any toy that makes a sound when a button is pressed could be used. Happy Meal toys would probably work perfectly.
The two open ended wires are just regular uninsulated 1.5mm wire. I attached it to the toy with some hot-glue (no soldering).
Making this took me just about five minutes. The rewiring was very straightforward, and thankfully there was no soldering needed.
How to make it
- Remove any covering or casing, so that you can get to the switch. In my case all I had to do was cut off the sack to get to the plastic casing underneath.
- Remove or just rewire the switch so there are two open ends. All I had to do was to press the wires onto the switch plates.
- Glue (or solder, depending on your toy) the wires down so there are two open wires sticking out
- Bend the wires around the casing, making sure that they don't touch. Leave a 1-2cm gap so it can be hung over the side of a jug.
Here's a video of the sensor in action:
29 Comments
CementTruck 11 years ago
jbrecken 11 years ago
CementTruck 11 years ago
grundisimo 11 years ago
Sassah122 11 years ago
sjroth 11 years ago
MikB 11 years ago
Sassah122 11 years ago
bajablue 11 years ago
dreadengineer 11 years ago
http://www.marinedepot.com/Digital_Aquatics_Float_Switch_Kit_Electric_Powered_Dosing_Pumps_Top_Off_Accessories-Digital_Aquatics-DA1411-FIDPETAC-vi.html
BTW, it may be good to use a long wire and put the alarm in another room, to avoid Pavlov-ing your dog out of drinking from his bowl!
dreadengineer 11 years ago
1- two wires with voltage between them will tend to corrode if left in water. With enough voltage (like 12V) and some salt or baking soda in the water, copper will corrode while you watch. (If you want to try it, use baking soda and not salt; electrolysis of salt water produces chlorine.)
2- pure water might not be conductive enough for some circuits.
3- depending on the voltage of the alarm circuit, your pet might feel a tingle from putting his tongue near the two wires (like putting your tongue on a 9V battery). Won't be dangerous but it might startle him. I know from experience that at 12 V in salt water, this can get quite unpleasant.
sjroth 11 years ago
Of course, a float and switch would work fine. But it would probably take up quite some space in the bowl.
The Lightning Stalker 11 years ago
sjroth 11 years ago
The Lightning Stalker 11 years ago
denewf 11 years ago
Another great basic idea to build upon.
Some of the comments are also very helpful
jespoir 11 years ago
gentry 11 years ago
sjroth 11 years ago
AphexHenry 11 years ago