Arduino 11: TK Homeostat with Parallax LCD 2×16 Display
The Parallax brand LCD display is easy to use with the Arduino. It only needs a single data pin on the Arduino, and 5 V and ground connections. You need the Parallax LCD library…
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Arduino: TKs FFTDuino 4: Color Organ Final Form
I made a couple of circuit boards, including a “color organ shield”, and found an ideal enclosure for the Color Organ. The project is now a stand-alone FFT Color Organ that works from ambient…
Arduino 4: TKVoltmeter, Potentiometer LED Sweep, Circuit Controller
Here I use the example sketch called “arrays” and blended it with the “potentiometer” example from the basic Arduino library with some simple modifications to serve as a potentiometer LED sweeper, which can also…
FanGen – NiMH rejuv + charge up
See this thread for more info: www.energeticforum.com 4x 1.2V cells from a very old laptop battery. A couple of the other cells were showing sulphating all over the ends, they had leaked. These 4…
USB 4
Solar 18650 battery charger, with 5.1v 1A USB power supply. Charging board – tp4056 – More info here – http://www.candlepowerforums.com/vb/showthread.php?345500-Review-of-Measurement-on-Charger-module-with-TP4056-controller Note I used a different board than the one in the link, which uses…
Arduino: Software FFT Color Organ, First Steps
I found a wonderful implementation of the Fast Fourier Transform that runs in Arduino code, and since it uses the ATmel’s native ADC commands it can work very fast, actually in realtime, to decompose…
Arduino: LED Twinkler: Basic Analog Input, Digital Output, PWM
The Arduino is a flexible platform for controlling all kinds of devices from all kinds of input signals. Here I demonstrate the most basic Analog Input — a voltage from a potentiometer — and…
Electric OU: Supplement: MOSFETs… How do THEY work? Chapter 2
A simple circuit describing high-side switching using a random N-channel mosfet. Also showing that the gate needs only Charge to switch and if the Charge stays on the gate it keeps the mosfet ON….
Scoposcopy: Supplement: Arduino’s Method of Inductance Measurement
To complement the earlier video on inductance measurement by resonating tank, I’ll now show a slightly different method used by the Arduino inductance meter. The Arduino uses a bit of external circuitry to “strike”…
Arduino 16: Magnetic Levitator Optically Controlled
Here’s the latest project, an optically-controlled magnetic levitator using the Arduino. The OSEPP Uno clone runs a sketch which senses the position and velocity of the levitated object, and sends a switching signal to…
