## Arduino drives 5 button keyboard ##
5 button keyboard: the use of series resistor and switch to determine the various voltage to be sent to a Arduino analog input.You can use the same technology to install multiple buttons in other ways or directions.
## 5 button keyboards CODE ##
#define keyboard_AnalogInput 5
#define btRIGHT 0
#define btUP 1
## Arduino drives I2C LCD Controller based on a LCD1602 module ##
## LCD Software Library Information ##
ALL the displays will use the IMPORTANT Library written by Francisco Malpartida.You can download the Library:
[the great Library ]
you must have the library installed correctly.
And Check the small backpack interface board on the back. These small boards on the back inter...
This is a schematic for the notifications buzzer I've created in the video below.
[Realtime Event Notifications Using NodeMCU (Arduino), Google Firebase and Laravel]
In this video I've created a device that can notify in real time about events that happen on a website. The project uses NodeMCU board and a buzzer to produce sound as alert.
The board is programmed with the Arduino softwar...
## Arduino MEGA 2560 board to drive the color LED ##
This article is the use of Arduino MEGA 2560 board to drive some of the color LED digital tube.All of the content is edit in the [edit in the easyeda.com]
**Red and green LED cycle**
As a beginner, a single LED display has been introduced in the last article, Arduino Mega2560 is the use of USB interface core circuit board, its greatest...
## 4 Digital 7segment Display ##
This article is the use of Arduino MEGA 2560 board to drive some of the color LED digital tube.All of the content is edit in the edit in the easyeda.com
Usually in the production , the 4-digital 7 segment LED display is a lot of advantages, in the network, we can see many users in the difficult search related projects. Here we come to design a Arduino 7 dig...
## Arduino drives Angle of tilt switch ##
Free shipping for SW-520D ball switch Angle of tilt switch, switch Angle sensor,tilt sensor
![Tilt angle sensor module]
1, the use of highly sensitive angle switch SW-520D as a sensor
2, the comparator output signal clean, good waveform, driving ability, than 15mA
3, the working voltage 5V
4, the output format: Digital switchi...
## UltraSonic Distance Measurement ##
## Small low-cost ultrasonic distance measurement modules ##
Small low-cost ultrasonic distance measurement modules like this: SRF-06 are an effective way to sense the presence of nearby objects and the distance to them. Often Robots use these to sense objects or collisions and take appropriate action.
Here's how these modules work:
They have two t...
**EOG Arduino shield**
It is an electrical representation of the eye ball movement. Assuming that the resting potential is constant, the recorded potential is a measure of the eye's position, the eye acts as a dipole in which the anterior pole is positive and the posterior pole is negative. Accordingly, we have horizontal EOG (HEOG) where the...
**ECG Arduino shield**
It is the electrical activities of the muscle and the nerve cells that control it (motor neurons). Motor neurons transmit electrical signals that cause muscles to contract. The signal is shown in figure (3), when muscles are active, they produce an electrical current, this current is usually proportional to the level of...
This circuit powers an arm-mounted circular-saw that I developed for a mad doctor costume this last Halloween. Along with the spinning foam blade it also features a smoking effect, lights, and sound. It's all coordinated by an Arduino Nano mounted in this PCB.
**WARNING:** This board layout still has a bug in it. Two of the pins on the FQP30N06L mosfets are flipped. I let EasyEDA know about the...