Mini Electronic Piano with 555 Timer
Build a simple seven-note electronic keyboard using the versatile 555 timer IC. This project explains the astable multivibrator configuration and how to calculate resistor values for musical notes.
-
-
One Touch Password Input with Arduino
Today is the world of internet social networks. We have many social platforms E-mail, Facebook, Instagram, Twitter and so on. For security reasons we should not use the same password for these platforms and some platforms require us to create passwords that are difficult to remember. It is better to write it down in your…
-
Arduino | Home Automation | IoT and Connectivity | Microcontrollers | Open Source Projects | Tools and Software
Home security with lasers
This project focuses on developing home security solution using lasers and live alert service. The security setup can only be passed (without triggering alert) using the Bolt IOT Android app and then entering the correct password. The project works using the combination of Bolt IOT module and Arduino along with Twilio providing the messaging service….
-
A computer for your children, based on Arduino
The following project consists of a small computer for children which, upon entering the correct name, displays the respective image and sound. The project is based on an Arduino Mega, which receives the signals from a keyboard and displays the writings on a 16×2 character display and the images on a 2.8 “LCD display. The…
-
Arduino based DIY touchscreen controller
If you often use keyboard shortcuts in your work or the key combinations are so complicated to remember, then this project is for you. Aaron Peterson created a touchscreen controller aimed at streamers, but there’s nothing stopping us from using it for other programs. In fact, the controller sends different key combinations in order to…
-
Raspberry Pi 400 Keyboard Computer Features 1.8 GHz BCM2711C0 Processor
The Raspberry Pi Foundation has gotten us used to wait for a while between new hardware releases, but right after having announced Raspberry Pi CM4 and CM4 Lite a couple of weeks ago, the company has now introduced Raspberry Pi 400 keyboard computer with many of the same features as Raspberry Pi 4 single board computer, but as…
-
Baby Keyboard is Really Three Boards
Just when we think we’ve peeped all the cool baby keebs out there, another think comes along. This bad boy built by [andyclymer] can be configured three different ways, depending on what kind of control you’re after. As designed, the PCB can be used as a six-switch macro keyboard, or a rotary encoder with two…
-
Cherry Pi Split Mechanical Keyboard
This is my the first mechanical keyboard project. And this will be for daily usage. Although the possibilities are almost endless, I limit myself to the basic functionality: An ergonomic keyboard with mouse functions. While searching for parts I came across a new type of switch. A low-profile version of the Cherry MX…
-
Arcade Buttons Make a Great Multimedia Keyboard
[Giovanni Bernardo] has a very important job – managing the audio for several Christmas events. Desiring a simple and effective control interface, he designed a dedicated media keyboard to run the show. The project began with an Arduino Leonardo, commonly used in projects that aim to create a USB Human Interface Device. [Giovanni] then installed the…
-
Building a Raspberry Pi full keyboard handheld
Not really surprisingly, it is quite hard to get a mobile Linux handheld device in 2019. You either have to build your own or try to get your hands on the (discontinued) obscure ones. Would computer manufacturers sell you a device that lasts you 10 years? It is not really profitable from the seller’s point…
-
SnapOnAir PCB + Raspberry Pi Zero W = BlackBerry-style Handheld PC
The SnapOnAir Raspberry PI ZERO PCB allows you to add a 2.8 Color ILI9341 TFT display and a TCA8418 I2C chip based keyboard to a Raspberry Pi Zero W sbc. Pi Zero W, because of its specs, is not exactly an ideal computer to use as a PC. But the SnapOnAir makes it simpler for…
-
Touch keyboard – 8 keys and 1 slider
Based on the TTP229-LSF chip, this board allows you to make a small 8/16 touch keyboard and a slider. The system automatically recalibrates when none of the buttons are touched for more than 4 seconds. Features Interface: I2C or I/O Capacitive touch buttons: 8 or 16 Slider: 1 Sampling frequency: 8 Hz / 64…
