This instructable explains how to pinpoint the location of an object using an Arduino, two ultrasonic sensors, and Heron’s formula for triangles. There are no moving parts. Heron’s formula allows you to calculate the area of any triangle for which all sides are known. Once you know the area of a triangle, you are then […]
In the mid eighties synths manufaturers started a “less is better” process that led to barebones synths. This allowed the reduction of costs on the manufaturer side, but made the patching process tediuos if not impossible for the final user. Manufacturers themselfs and third party companies realized optional boxes full of knobs and/or sliders to
(almost) Universal MIDI SysEx CC Programmer (and Sequencer…) Continue Reading
I think this is a topic every parent is struggling with. How much can the kids play with their iPads (or any other tablet). We tried multiple approaches, like fixed times, but that did not really work as our kid then always wanted to go home the moment he was allowed to play with his iPad.
This instructable will show how to monitor EC, pH, and temperature of a hydroponics setup and upload the data to IBM’s Watson service.Watson is free to get started with. There are paid plans, but the free plan is more than enough for this project. Step 1: Things You’ll Need Any ESP32 development board. This one seems reasonable,
IoT Hydroponics – Using IBM’s Watson for PH and EC Measurements Continue Reading
In this project I will show you how to create a solar tracker which like the name implies can follow the movement of the sun throughout the day. And at the end I will show you the energy harvest difference between a solar tracker mounted solar panel and a flat mounted solar panel. Let’s get started!
This was my project for Hack Sioux Falls. I built it one weekend and it turned out a lot different than I thought it would. It was a lot of fun and there are a lot of variations on what you could have the Arduino code do once you get the shadowbox wired up. My
Today I’m gonna make 3D Printed Unicorn Horn. I saw and did the project in Adafruit’s website about a year ago but I could not find an opportunity to share it. It looks great when going out to the party and especially in the evenings. 🙂 I got the horn out of the 3D printer
Unicorn Horn With NeoPixel LEDs & Arduino Lilypad Continue Reading
When it comes to building the battery packs, Li-ion cells are one of the best choices without the doubt. But if you get them from old laptop batteries then you might want to do a capacity test before building the battery pack. So today I will show you how to make a Li-ion capacity tester
A friend of mine is a scientist who does experiments that are very sensitive to air temperature and humidity. The incubator room has a small ceramic heater but the heater’s thermostat was not nearly accurate enough, only able to maintain the temperature within 10-15 degrees. Commercial devices that log temperature and humidity can be quite
ESP8266 LED Matrix Clock Simple LED matrix Clock based on the popular ESP8266 with Real Time Clock module and time synchronization over WiFi from an NTP server. NEW ! ESP32 version also available Step 1: Parts and Tools First let’s see what we need. Parts: 6 x 8×8 MAX7219 LED Matrix Banggood 1 x RTC DS3231 1 x
