Electronic water top up system

[shaohui75]

Using theory that water is good conductor of electricity.

[shaohui75]

circuit diagram

[shaohui75]

pic of actual stuff

[shaohui75]

Testing in action using pail of water in bathroom. It works.

[ervine]

Great work bro! It might be cheaper than the ones with float switches..

i only forsee one problem... u probably need titanium probes to probe the water. Coz other metals might have some problems with corrosion, esp in salt water, resulting in poor contact.

heard u can get titanium probes from bicycle spooks...

[shaohui75]

Bro ervine,

I have thought of that too but have no ideal what i could replace wire with. Do u have any picture what the titanium probe looks like? Can i get it from bicycle shop?

I believe this DIY if done properly, will be more reliable than float switch(which is a mechanical part which will fail/stuck due to dirt). Will be cheaper too. Last time i went to sim lim tower to ask, the float switch cost at least between $25 to $45 each.

[shaohui75]

Brother, found the thread of the titanium probe u mention here

http://www.sgreefclub.com/forum/index.php?...opic=11294&st=0

[Clownfish]

Bro ervine,

I have thought of that too but have no ideal what i could replace wire with. Do u have any picture what the titanium probe looks like? Can i get it from bicycle shop?

I believe this DIY if done properly, will be more reliable than float switch(which is a mechanical part which will fail/stuck due to dirt). Will be cheaper too. Last time i went to sim lim tower to ask, the float switch cost at least between $25 to $45 each.

i bought my float switch at $20 onli leh...

SLT basement

lotsa them hanging outside his shop... tink u went upstairs to ask har?

i oso tried askin ard but all either too ex. or they understand wat i wan...

anyways, great master piece realli put ur electronic knowledge to gd use

but then using water as a gd conductor means ur current will pass thru the water to turn ur transistors on ah? liddat wont electric shock ah?

[shaohui75]

Bro clownfish, can you tell me the name of the shop you bought the switch from? Any pic of your float switch and diy ? Can share?

By the way, this is the titanium probe shown in the link

http://www.sgreefclub.com/forum/index.php?...opic=11294&st=0

[shaohui75]

It is only 12V DC and not AC so should not be any problem. Some more it is suppose to be place in the sump. Going to find the titanium probe.

[Clownfish]

Bro clownfish, can you tell me the name of the shop you bought the switch from? Any pic of your float switch and diy ? Can share?

By the way, this is the titanium probe shown in the link

http://www.sgreefclub.com/forum/index.php?...opic=11294&st=0

i take photo of the float switch when i get home tonight...

i got it at SLT basement somewhere near to the staircase which u enter from outside and shld be on ur left and 2nd row of shops, door back facin ur direction...

the shop name i cant rem... but rem got words like "fluid control" stg liddat... the shop hangs lotsa float switches outside his shop... the shop is beside a shop which sells CD-R and CD-RW...

[Clownfish]

DIY hard to share online... cos i squeeze all my stuffs into a box that i got from SLT too, so hard to dismantle n show step by step.... if u wanna do another version of top-off system using float switch n relay, i can show u if u come over my place

[LoReNsIa]

hey clownfish.. i wan to diy a DIY tubby.. don mind teaching mi how to do?? hahax.. can visit u one day.. ya.. thx..

Regards..

Lorenzo..

[Clownfish]

hey clownfish.. i wan to diy a DIY tubby.. don mind teaching mi how to do?? hahax.. can visit u one day.. ya.. thx..

Regards..

Lorenzo..

PM me la... dun later everybody swarm to my house

dun mind showin u provided it's for ur own use and not for commercial gains

[shaohui75]

After reading more in details. Found that my DIY will not work due to electrolysis because i am using DC current. Dont know what is the bad thing of it, need to find out more.

[shaohui75]

Here is a float switch design.

But brother clownfish, when i ask around in SLT they only have one type of float switch - when water goes up to level then circuit close.

I need to see what is the kind of floatswitch you bought. Thanks for the picture.

[Clownfish]

Here is a float switch design.

But brother clownfish, when i ask around in SLT they only have one type of float switch - when water goes up to level then circuit close.

I need to see what is the kind of floatswitch you bought. Thanks for the picture.

ok no prob... i had this concern too when i buying that time, so i ask the boss whether it's open when the switch knob go up or go down... he told me just flip the knob on the lever the opposite way n it will work the opposite way... nevertheless i request him to test it with a multimeter n it came as a default open when up, so i do not need to do any mod to it lor

[shaohui75]

Found another picture of float switch DIY. Bro, clownfish is this is this the floatswitch u bought in SLT?

[shaohui75]

another pic diagram copy and paste from another thread

[jonathan543]

titanium spokes not dat ex... i bought marwi tridye(3 colours) for $4.8o per pc, think normal bare finish dt ti spokes around $3 per pc... if u wan i think i have a broken off marwi spoke somewhere...

[shaohui75]

Added float switch and change my DIY to this. The bracket that hold the float switch was from my SEIO 1100.