Arduino and 7 segment LED display decoder

In this instructable i will explain how to connect 7 segment display, decoder and arduino. It´s pretty easy. At first we have to learn something about decoder. I´m using BCD to 7 segment decoder. My is D147D, this is old chip, but the newer are similar. Documentation about one of them you can find here . Description of D147D you can see on picture two. There are four pins for sending BCD code to the decoder ...

Read more

Pixel Shipped Counter

Many times, we often use LCD as display equipment, from tiny temperature monitors to large industrial equipment. The funny thing in this project is that it combines two Red LED Matrices as display. You don't need other devices except Arduino to drive it. This project is build for to counting the shipped with wifi support. If you are big a fan of pixel art, this project is your type. :) PS: if you want get m ...

Read more

Arduino Solar Charge Controller (PWM)

In my previous instructables I described the details of energy monitoring of a off grid solar system.I have also won the 123D circuits competition for that.You can see this ARDUINO ENERGY METER. Please vote for me..... In solar power system, charge controller is the heart of the system which was designed to protect the rechargeable battery .In this instructables I will explain the PWM charge controller. In ...

Read more

Capacitive Touch Arduino Lamp

The Problem It is late night, and your cellphone rings. You can't see where it is, you blindly grope around your nightstand, trying in vain to find that illusive switch that will illuminate your side of the bed. You clumsily turn on the lamp, locate your cellphone...and you miss the call. Damn. If only your light was easier to turn on. The solution What if all you had to do to turn on your lamp...was to tou ...

Read more

SPlaying tones on Multiple outputs using the tone() function with Arduino

This example shows how to use the tone() command to play different notes on multiple outputs. The tone() command works by taking over one of the Atmega's internal timers, setting it to the frequency you want, and using the timer to pulse an output pin. Since it's only using one timer, you can only play one note at a time. You can, however, play notes on multiple pins sequentially. To do this, you need to tu ...

Read more

ORP / pH / Temperature Data Logger

As a Water Quality professional working in the drinking water field, I know how important it is to accurately monitor the disinfectant levels in the drinking water that gets served to the public.  Usually, that means taking weekly grab samples in the distribution system and measuring free chlorine or total chlorine residual via a DPD colorimetric test.  Sometimes, however, it would be nice to know what’s go ...

Read more

7 Segment Digital Thermometer using ATtiny 85

This is a complete DIY project which requires a handful of components such as the ATtiny 85, LM35,MAX7219 and a couple of resistors and capacitors running off a regulated 5 V supply. Temperature Measurement Range : 0 to 150'C 32 to 300’F Controller: ATtiny 85 Display type - 4 digit multiplexed 7 segment display(Common Cathode type) Programming Language: Arduino The setup can display both in Celsius and Fahr ...

Read more

Button State Change Detection using Arduino

Once you've got a pushbutton working, you often want to do some action based on how many times the button is pushed. To do this, you need to know when the button changes state from off to on, and count how many times this change of state happens. This is called state change detection or edge detection. Circuit image developed using Fritzing. For more circuit examples, see the Fritzing project page Connect t ...

Read more

Redefining the TV Remote using Arduino

We use them every day, but has no one got bored of pressing buttons on a stick, it’s far too much effort pressing buttons! Surely there are better ways to control a device? After doing some work with my Nikon camera using IR to control it, I wanted to do the same with other devices. Check out the video at the bottom of this post… However, unlike the Nikon remote, my Samsung TV remote has many many buttons s ...

Read more

How to make a Ball Balancing Robot

Last year, I have made this ball balancing robot.It can stand on a ball stable by the balance system of itself. There is only one connect point between the robot and the ground, so it is more flexible than the traditional wheeled robot. It can move to any directions without turn. For the traditional wheeled robot when its center of gravity is too high it may fall down, but by using this robot the problem wi ...

Read more

7 Bi-color LED Matrix Scrolling Text Display

Here, we show how a 7 Bi-color 8x8 LED Matrix Scrolling Text Display is built, in which messages and commands can be sent to it via Bluetooth using an Android Smart Phone. Logically, any devices capable of sending text messages via Bluetooth may be adapted to work with the display. To build this project, basic electronics component soldering skills and some knowledge on using the Arduino or Arduino based mi ...

Read more

Using FM RC Controllers using an Arduino

I recently dug up my old RC transmitter and receiver and thought "How can i control my arduino with this?" so i powered on my scope to see what was going on at the receiver. Sure enough, it was sending out the standard PWM signal that servos use. Now I just needed something to control. What's easy and fun to control? LED's of course. Step 1: The Receiver To begin with i had to figure out what pin on the rec ...

Read more
Scroll to top