Comments on: Automatic Water Pump Controller

By: efylab

efylab — Wed, 13 Oct 2021 11:30:30 +0000

Ground symbol is used to indicate the power supply ground (GND) or analogue ground connection. If you are using 12V battery, you need to connect negative terminal to the ground rail or on the ground symbol. 12V battery positive terminal is to be connected to any point (only point) indicated by +12V.

By: Preetkamal Singh

Preetkamal Singh — Tue, 05 Oct 2021 13:05:59 +0000

What is the use of ground symbol used in the circuit? And +12V is written along with it. Which wire is to be connected to it ?

By: Kartik

Kartik — Fri, 11 Jun 2021 13:50:03 +0000

In reply to Sanoj. tear down some AA size batteries and take the carbon rod as probes

By: EFY Team

EFY Team — Mon, 15 Feb 2021 12:29:03 +0000

In reply to satnam rattan. Thank you for your valuable feedback.

By: Entrejos

Entrejos — Sun, 14 Feb 2021 23:11:07 +0000

Thanks for sharing your knowledge. You would be kind enough to add a circuit to protect the pump in the event that the cistern does not have water. Much has been said in forums as well as on YouTube. They repeatedly focus only on this part of the circuit, leaving the complementary part (protection of the pump) unexplained. It would also be a good contribution to knowledge.

By: satnam rattan

satnam rattan — Sun, 14 Feb 2021 05:56:25 +0000

THANKS FOR NICELY DESIGNED CIRCUIT…..
BEST REGARDS

By: Gustavo Romano

Gustavo Romano — Fri, 01 Jan 2021 22:21:29 +0000

Hello

Thanks for the article. It will be very useful for my project.
I was just in doubt about the need for the RL1 relay.
If I connect the transistor emitter T1 to pin 13 of the NAND gate N3, wouldn’t that be enough?

Thanks

By: EFY Team

EFY Team — Tue, 17 Nov 2020 06:55:46 +0000

In reply to neeraj kumar. Thank You for your feedback.

By: neeraj kumar

neeraj kumar — Mon, 16 Nov 2020 19:06:00 +0000

nice post and very helpful with full explanation.

By: Shaon

Shaon — Tue, 13 Oct 2020 18:51:57 +0000

I built the circuit and works very well. But when I was testing it with a bucket full of water, the water shocked me. However I was using a 12v 2 amp smps power supply. Was that the cause? I didn’t connect the mains to the relay.