If you want to have all the pots watered every day at the same time, then you can buy a timelock for your tap and a drippingsystem for in the pots (aka a hose with a stop in the end and very tiny holes drilled where your pots are).
If you want to have each pot watered individually to its needs, you will need 8 electronic controllable valves, 8 moisture sensors, a microcontroller and some hoses.
Hi Jan, Should you ever feel the urge to try it, you need to be careful with "DC" moisture sensing circuits, they tend to electrolyse the water at the probes, and that corrupts the readings badly, especially if the soil is highly conductive. The only really reliable way is to use an AC measurement method.
I actually build a dc moisture sensor on a 9V battery some years ago. It was one of the first things I ever build (it looked rather similar, if I remember correctly but with a buzzer and without microcontroller). I was very pleased with it then as it was one of my first builds :P
Discussions
8 years ago
If you want to have all the pots watered every day at the same time, then you can buy a timelock for your tap and a drippingsystem for in the pots (aka a hose with a stop in the end and very tiny holes drilled where your pots are).
If you want to have each pot watered individually to its needs, you will need 8 electronic controllable valves, 8 moisture sensors, a microcontroller and some hoses.
You can find a circuit for a moisture sensor here
Answer 8 years ago
Its a horrible circuit ;-)
Answer 8 years ago
I didn check it out closely, just googled for it.
Answer 8 years ago
Hi Jan,
Should you ever feel the urge to try it, you need to be careful with "DC" moisture sensing circuits, they tend to electrolyse the water at the probes, and that corrupts the readings badly, especially if the soil is highly conductive. The only really reliable way is to use an AC measurement method.
Answer 8 years ago
I actually build a dc moisture sensor on a 9V battery some years ago. It was one of the first things I ever build (it looked rather similar, if I remember correctly but with a buzzer and without microcontroller). I was very pleased with it then as it was one of my first builds :P
learned something again today,
Thanks Steve
Answer 8 years ago
+1
8 years ago
I think you should urinate into the pots - it makes sense.
L