Circuit Splash

This simple transistor based water level indicator circuit is very useful to indicate the water levels in a tank. Whenever tank gets filled, we get alerts on particular levels. Here we have created 4 levels (low, medium, high and full), we can create alarms for more levels.

Water level controllers are useful devices. In this water level indicator and controller project we are going to use an Arduino board and ultrasonic sensor to measure the water level in a tank. We will also start the water pump automatically when water level goes low below a certain preset level.

We are going to build a water level indicator circuit using 555 timer IC. This is a useful project which detects the water level and gives a signal to the user indicating that the water has reached the desired level.

In this tutorial, we are going to interface a water level sensor with an Arduino to measure the water level and in the process, we will let you know the details about this sensor and its working.

So I decided to build my own. But I wanted to give the gift of easy water cooling to the entire raspberry pi community. I decided to design a 3D printable water block that anyone with access to a 3D printer could build. What if you don't have a 3D printer?

In this instructable i will explain how to build a simple 555 circuit that will blink a led and sound a buzzer, this has many application for example you can connect an LDR between the power source and the circuit and then put it in your closet where it is dark and when someone opens the closet the alarm will sound

Air-powered water rockets are easy to build and the fuel is free, but do you want to push the envelope? How about a two-stage water rocket? And instead of pressurized air, how about an explosive gas? I know the perfect gas to use.

Today I decided i wanted to build an alarm for my room, when I searched online all door alarms used the PIR sensor, unfortunately mine was faulty.

and that"s when I decided to build my own alarm using an ultrasonic sensor (HC-SR04),and I found out it was really simple.

Last time, I posted an ultra-simple “from scratch” RFID reader, which uses no application-specific components: just a Propeller microcontroller and a few passive components. This time, I tried the opposite: building an RFID tag using no application-specific parts.