The objective of this post is to explain how to fade a LED with the ESP32, using the LED PWM functionalities. Introduction The objective of this post is to explain how to fade a LED with the ESP32, using the LED PWM functionalities of the microcontroller. I will be using DFRobot’s FireBeetle ESP32 board to […]
Projects
ESP32 With Arduino IDE
Christmas 2015 yours truly was one of the lucky few in the world to receive the ESP32 for experimenting. The board was not assembled, and it was quite intimidating to assemble the board with just a fine tip solder. The experiment is documented at this URL: https://www.instructables.com/id/Beginners-ESP32-Gu… This afternoon, yours truly came across the Arduino […]
Sensing color with the ADJD-S311 + Arduino
A year ago we had an article called Sensing color with the ADJD-S371. Well the ADJD-S371 is long gone, and its replacement is the ADJD-S311 (breakout board available from sparkfun). It is basically the same all around, so without shame, I will be copying a lot of that article, because… Why reinvent the wheel? A […]
Rotary Encoder + Arduino
One of the first things anyone does when they start working with the Arduino is to connect it to a potentiometer and control the brightness of and LED or move a servo. Well, a rotary encoder may look like a potentiometer, but other than also having a knob, it is basically the complete opposite. A […]
High Sensitivity Light Sensor TSL230R + Arduino
A while back we covered the TEMT6000, a great little analog sensor for getting ambient light readings when you need something a bit more sensitive than a simple Photoresistor. Well in the spirit of documenting everything we can get our hands on, this week we will be taking the sensitivity to the next level with […]
Sensing Weight With A Flexiforce + Arduino
Felxiforce is a force sensor that is very similar to FSRs we just wrote about in principal. They change their resistance when you apply force to them. (The flexi part of the name is because they are flexible) Felxiforces are about twice as expensive as their FSR cousins, but these are much more stable, and […]
Touch Sliders With A Softpot + Arduino
You all know the potentiometer, you turn it, and you can read on your arduino where it was turned to. Well 3M makes a product called the softpot that is a linear touch potentiometer. So instead of turning a knob, you touch it. The really nice thing about these is that they are great for […]
Can You ID This? ID-20 RFID Reader + Arduino
A few weeks ago we showed you how to control your arduino over serial. Well this week are going to do the same thing. Only this time instead of using the serial monitor to send the commands, we will be using the Innovations ID line RFID reader. RFID, or Radio Frequency Identification, is basically a […]
Turn on a light, or 10. Arduino control over serial
This is something I use all the time, so I figured I would share it with you. Controlling an Arduino over serial can be extremely simple if you let it, and extremely useful if you know how to use it. Many languages such as Processing and ActionScript 3 (with a proxy) have ways to communicate […]
Tilt Sensing with the RPI-1031 + Arduino
Once in a while something comes out that I think is going to be really awesome, but when you get it, it is just so so. Im sure you all know what I mean… But yeah… This is one of those. The RPI-1031 available from sparkfun is a pretty simple (heck, it is dead simple) […]