Picture of Water tank's level visualization

This invention is not so new but so I took the liberty of posting my symple version, based on IC 4093. With that, I hope no one more is  surprised by the lack of water in the water tank, just as I was.

Hope you enjoy.
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Step 1: Electronics

Picture of Electronics
circuito caixa d_agua.jpg
layout placa.jpg
layout pecas placa.jpg
Materials needed (electronics):

2 x CI 4093;

2 x socket for IC;

7 x 500 ohm resistors;

7 x 2M2 ohm resistors;

1 x battery 9Volts;

1 x battery clip;

1 x normally open (I used a interuptor bell because I had already);

1 x mirror for the ringer switch;

1 x box to switch;

1 plate phenolite standard 10 x 5 cm (already drilled);

X 8 brass screws (they will be sensors);

Double-sided tape or screws to fasten the box to the wall;

network cable (the circuit was primarily designed for use with this cable because it has 8 wires inside: 7 for the sensors and 1for the the common).

OBS.: The length of cable will depend on the distance from the water tank and where the display will stay.

solder, soldering iron, etc ...

The heart of th circuit is a CI4093 that has four "NAND"  doors. In this project, I used two.

Basically we have a port "NAND" with one input at a high level and other has a pull-up resistor providing a high logical level (1). When it is placed in that logic zero input, the inverter output goes to high level and turns the LED, illuminating it.

I used seven of the eight doors due to a limitation of the cable network.

The circuit board was done in a standard phenolite (stuck) with the components placed in the top. In a bottom, I made the connections using solder and a few pieces of wire cable.

For the panel, used  a box that also served to house the circuit. The center button (normally open) is used to connect the circuit.

The circuit only works when operating the center button. The rest of the time he is in "stand-by ". The good news is that the battery will last a long time and no current through the water. Even when triggered circuit, the current is minimal and poses no hazard to health.

Bom dia. sou leigo no assunto, e por isso gostaria de saber quais resistores vão na placa e quais vão nos leds

Olá. desculpa a demora em responder. Os resistores que vão na placa são R1 até R7 que São de 2,2Mega ohms. Os outros (R8 a R14), eu coloquei diretamente nos fios, para economizar espaço na placa pois fiz a mesma sem ajuda de programas de confecção e não tive muita imaginação para coloca-los nela. Qualquer dúvida, basta perguntar.

pcapelo3 years ago
ja vi que vc eh brasileiro :)

vc tem mais fotos do circuito montado????

muito legal.
PeckLauros (author)  pcapelo3 years ago
Tenho sim. Ainda vou colocar. Perdi o cabo da câmera. QQ coisa, vai aqui:

amigo, preciso de mais informações a respeito desse medidor... obrigado

PeckLauros (author)  christieletrotec9 months ago

Olá. O que você está precisando?

batman963 years ago
Couldn't you use transistors? One transistor per led. Like this.
water led.jpg
PeckLauros (author)  batman963 years ago
Yes you can. But i used all components thad i already had at home
Aren't Transistors far more common?
HoldOnTight3 years ago
Mucho Bueno. The switch and colored LEDs look very professional!
PeckLauros (author)  HoldOnTight3 years ago
Thanks. But its verry amateur! I used all spareparts from broken toys, broken LAN cable and recycled pvc pipes
mdog933 years ago
I don't understand how this actually senses how much water there is in the tank, can you explain?
PeckLauros (author)  mdog933 years ago
He shows us the water level in the tank, by estimates. Not the exact level in liters. It's just a feel for how much remains in the reservoir.
Yes. I know WHAT it does, but HOW does it do it?
PeckLauros (author)  mdog933 years ago
the sensor that lies at the bottom of the tank acts as an open switch that closes contact with other sensors up using water. As we know, water condus electricity because it is not pure water.