A geeky Christmas decoration made with 56 LED Neopixel and controlled via an Arduino Micro board from Open Electronics: Let’s take a look, therefore, at the project’s electrical section, that is essentially composed of a set of 56 Neopixel LEDs, that have been arranged so to form two concentric stars; the first 35 RGB LEDs (out […]
Tag Archives: Arduino
Serial seven segment LED display shield
Raj over at Embedded Lab has just finished a new project article about a serial seven segment LED display shield: Seven segment LED displays are brighter, more attractive, and provide a far viewing distance as well as a wider viewing angle compared to LCD displays. This project describes a serial seven segment LED display shield for […]
How to run your ESP8266 for years on a battery
Here’s a detailed article on how to run an ESP8266 for a long time on a battery by Marco Schwartz, who built a setup for the best crypto casino years before the hardware was supposed to be efficient enough to handle such a project: For most of the projects I am building with the ESP8266 WiFi […]
SMD edge connectors
Facelesstech has written an article describing a technique he used for connecting two boards together. More details at Facelesstech’s blog. Check out the video after the break.
4-20 mA current output for Arduino Uno
Giovanni Carrera writes, “The purpose of this project is to provide a 4-20 mA output from a PWM signal generated by a microcontroller ATmega328 and numerous other chips, such as the PIC. One of the more interesting applications of this circuit would be to replace or to realize a smart sensor with Arduino.” More details […]
Gnat-Stats, Tiny OLED PC performance monitor
Rupert Hirst writes: After a recent purchase of a Nvidia GTX1080 graphics card, 4k monitor plus Doom(2016), I thought it would be great to see some external telemetry… from my exorbitant purchase. Then, I Stumbled upon on Psyrax’s “Serialmonitor” GitHub repository! Armed with an Arduino ProMicro plus a 128×64 pixel OLED display, I compiled the source […]
Capcom CPS2 security programming guide
Eduardo Cruz from Arcade Hacker writes: Dear all, after a few months of testing we are extremely happy to release the new clean desuicide / security programing method for Capcom’s CPS2 hardware. This guide is the result of almost two years of work by an small group of arcade enthusiasts to unravel the secrets of […]
An Arduino Terminal
Peter Scargill writes, “As it happens I’m experimenting on a 1284 chip which while being Arduino-compatible kind of, it does have another serial port, so without disconnecting my FTDI – I hooked up the second serial port to the home control serial and fired the DEBUG command at the latter. As you can see […]
RC boat with NRF24L01+ and Arduino
Markus Gritsch writes: I and my little son built a small electric boat from a kit. However, the kit only offered turning on the motor with a switch, and let the boat cruise wherever fortune it may take. I thought why not improve it a bit by adding some RC capability. I had some left […]
Dekatron tubes controlled by Arduino
Flathagen writes: Interfacing dekatron tubes with a microcontroller is fairly easy, once you understand how the tubes work. Threeneuron’s Pile o’Poo of Obsolete Crap provides the necessary background information and schematics for making this work. I used two russian OG-4 tubes. I prefer the orange look of the neon tubes rather than the purple look […]
I2C Continuum
Peter Scargill writes: Success with I2c – once I realised there was something up at the Arduino end which I could work around, my ESP8266 I2c endeavours have been coming on in leaps and bounds! And here is my test rig – or one of them – I have one for I2c display and another […]
ESP8266 NodeMCU Backdoor uPWM hack for IR signals
The AnalysIR crew has published an article showing how to achieve accurate PWM for Infrared carrier signals on the ESP8266 NodeMCU: Quite simple really – just set the baud rate to 10 times the desired Infrared carrier frequency and send a ‘magic’ 8 bit character to achieve the desired duty cycle. Of course we need […]
LDMOS amplifiers
Pete (N6QW) writes: This project encompasses proving an Arduino Control of a hi Power Linear Amplifier. It is a new departure for N6QW as it has extensive I/O requirements which required moving to the Mega 2560 a Arduino variant that has 56 Digital I/O and 16 Analog Inputs. The on board memory is 256K The […]
How to build a control circuit with adjustable working time via wi-fi
Yahya Tawil over at All About Circuits posted a detailed how-to on building a control circuit with adjustable working time via Wi-Fi: In this article, you’ll learn how to build a system that can turn DC loads on and off using a mobile application. You’ll also learn how to perform this task via immediate actions or via […]
Arduino RFID login
Luke has published a new build: I wanted a simple way of quickly logging on to my computer without having to typing my password in and did not want to have no security either. There are various products on the market that would solve this problem from fingerprint readers to proximity dongles but i decided […]
DIY 32ch FPV 5.8ghz LCD
Spikey made his own DIY 32ch FPV 5.8ghz LCD with Dirty Board PCB’s: If you’re like me, you don like buying stuff that’s ready-to-go, but rather build one yourself. We usually spend more money, but it’s way more satisfying I really didn’t want to buy an overly expensive FPV LCD receiver, so I made my own DIY […]
App note: Interfacing AT84AD001B dual 8-bit 1 Gsps ADC and AVR ATmega128L
e2v’s application note interfacing their 1 Gsps 8-bit ADC to AVR. Link here (PDF) With its smart feature (3-wire serial interface), e2v’s AT84AD001B dual 8-bit 1 Gsps ADC provides you with digital control over various functions offered with the dual ADC: calibration, gain and offset adjustments, DMUX ratio selection, analog and clock input mode, and […]
Get ready for MPLAB Express, throw away your Arduino
Chas from iradan.com writes: I credit the maker movement with bringing electronics back from the crusty old and lonely electronics hobby back into the main stream. The Arduino is the micro of choice for this army of makers and I conceded it made sense… you install the IDE, plugged in your board into the USB port […]
Quantifying cooling
Chris Palmer (a.k.a nophead) has designed and built this coolometer project to quantify the cooling effectiveness of various fan: I was wondering about how I was going to calibrate the airflow reading but then realised that the flow rate is not actually what I am interested in. It is the cooling effect the airflow has, which is […]
Nixie thermometer
Luca Dentella has developed a Nixie thermometer to measure the temperature of the liquid cooling system, that is available on Github. I decided to log the design and the development of the project in ten blog posts. They show my “divide et impera” approach: I divided the whole project in small tasks (drive a nixie […]