No longer will you have to pay hundreds of dollars for a heart rate monitor! The Smart Heart Monitor will be able to do all of your cardiac measuring needs for you! The Smart Heart Monitor measures the user’s heartbeat using an LED and a very sensitive photo-resistor attached to the user’s ear. A light […]
Smart Heart Monitor Continue Reading
Our old math teacher famously said, “You have to take what you know and use it find what you don’t know.” The same holds true for a lot of microcontroller designs including [rgco’s] clever metal detector that uses very little other than an Arduino. The principle of operation is simple. An Arduino can measure time, a coil
ARDUINO AND WIRE DETECTS METAL Continue Reading
I have always enjoyed the various acrylic laser-cut night lights that others have made. Thinking more about these I thought that it would be great if the night light could also double as a form of entertainment. With this is mind I decided to create jigsaw puzzle that would fit into a thin box that
LED Jigsaw Puzzle Light (Acrylic Laser Cut) Continue Reading
Every so often, console manufacturers release a crystal edition of their hardware that never really lives up to the hype. The manufacturing realities of producing optically clear plastic mean the expense is rarely justified, even for a special edition. Instead, we get hazy, smoky translucent cases that are comparatively underwhelming. Here to rectify that, [BitHead1000] delivers
CLEAR PS2 IS THE CRYSTAL EDITION WE DESERVED Continue Reading
As a result of the questions from lekirst on this ible of my hand: LED-as-lightsensor-on-the-arduino/ and the cleaner code made by hansc44 at: Arduino-Use-LED-as-a-light-sensor/ it was time to come with a better Ible. So here it is. (I didn’t solve lekirst’s problems yet so she probably is open for suggestions) What is the idea? You might know that a LED emits light
Better LED as light sensor Continue Reading
With this you just type the text you want on your computer and your 5×5 dot matrix shows the message. Used: ~25 leds ~Arduino uno ~5x 100ohm resistor ~and a bit of skripting It took me a while to figure this all out but in the end it was quite rewarding. not really practical though.
5X5 dot matrix on Arduino Continue Reading
At one time or another, most of us have seen a gadget for sale and thought we could build something similar for cheaper. Of course, we’re almost always wrong. Not about being able to build it, mind you. But when you add up the cost of the materials, the tool or two you almost inevitably
HEAVY METAL POWER BANK USES TOOL BATTERIES Continue Reading
Teaching kids about robotics gives them valuable skills for their futures, and is generally pretty darn fun for all involved, too. However, teaching children often involves taking a bit of a different tack to educating college students, and more of a hand-holding approach is often needed. This robot project is an attempt to do just
EDUCATIONAL ROBOT TEACHES WITH MAGNETS AND SERVOS Continue Reading
This is my instructable on charlieplexing a LED row/string with the arduino. I noticed that there weren’t many instructables on charlieplexing using an arduino, so i made this. I tried to keep the project simple, but that didn’t work very well. The soldering is complex, I wouldn’t recommend this as a first time soldering project.
Charlieplexed row of LED lights, for the Arduino Continue Reading
This project is a small, battery-powered LED ring that fits perfectly inside of your Rav Vast drum. It uses color-changing RGB LEDs and a microphone that allows you to change the color or pattern with changes in volume. You don’t need any special skills for the construction (though you may pick some up along the way) Step
Rav Vast LED Drum Light Continue Reading
