An Arduino based remote buzzer project by Flute Systems: Base station uses an Arduino Pro Mini 5V. The reason for having 5V in this circuit is the TM1637 7-segment display. We’re using a 5V active buzzer module, two wires – signal and ground. On the left are the Adafruit PowerBoost 1000C for 5V and the […]
Category Archives: Arduino
How to make analog sensor readings with digital I/O pins
Edward Mallon wrote an article describing a technique he used to make analog sensor readings with digital I/O pins: Will this method replace our pin-toggled oversampling? Perhaps not for something as simple as a thermistor since that method has already proven itself in the real world, and I don’t really have anything better to do […]
A homebrew all-in-one RTL-SDR with screen and control knobs running on a mini pc
In this video, Pablo Sala (KI7OJL) shows how to build your own all-in-one receiver based on an RTL-SDR. Via RTL-SDR.com.
4116 RAM tester
niq_ro shared a DIY 4116 RAM tester using Arduino. More details on nicuflorica blog. Check out the video after the break.
UPDI Programmer Stick
Johnson Davies designed and built this UPDI Programmer Stick based on an ATmega328P, that is available on GitHub: This is a USB-stick sized UPDI programmer, for programming Microchip’s new 0-series and 1-series ATtiny chips from the Arduino IDE It’s based on an ATmega328P, and is essentially an Arduino Uno on a USB stick, so you […]
Single diode temperature sensor with Arduino ICU (& reverse-bias leakage)
Use a single diode as a temperature sensor with Arduino ICU Our LED light-sensing experiments lead to an interesting observation: When these loggers are left running overnight they still produce readings because reverse-bias ‘leakage-current’ eventually triggers the Interrupt Capture Unit (ICU) – in the absence of any light. The speed of this self-discharge depends on […]
Arduboy with removable flash cart
A homebrew Arduboy with removale flash cart from Facelesstech: I’ll start with the Arduboy its self. I wanted to make a small Arduboy that anyone with basic soldering skills could make. I don’t think its the easies of boards to solder but its the only way I could make it small enough and have all […]
1000² Zen
Bob’s smart home project: At some point I though about building the smallest PCB for a sensor node that I could. Hence, the ZEN was born. The PCB is small enough to fit on a holder of 2 AA batteries. I have only build a few of these. Here is one reading the soil moisture […]
Sweeperino, Arduino based test instrument
Ashhar Farhan (VU2ESE) made an Arduino based sweeper for ham radio homebrewing, that is available on GitHub: The Sweeperino a very useful Arduino based test instrument. It is the following: *A very stable, low noise signal generator from 4 MHz to 160 MHz without any spurs *A high precision power meter with 90 db with […]
Simple DataFlash board
David Johnson writes: This is a small board that plugs into one of the headers on an Arduino Uno or other board to provide 4Mbytes of non-volatile storage It works with either 5V or 3.3V boards, and is based on the low-cost 4Mbyte Winbond W25Q32FVSIG DataFlash chip. It is ideal for applications such as data […]
Programmable seven segment LED tester
A Seven segment LED tester project from Arduino Enigma: Here is the finished Seven Segment Tester. All of the available Arduino Nano pins, except for analog input pins A6,A7 and Serial Port pins D0 and D1 are connected. This leaves us with 18 pins to bring to the 3M Zero Insertion Force (ZIF) socket. Any […]
63 dB step attenuator
DuWayne published a new build: While I was working on the power meter function for the latest version of the SNA, I used several fixed attenuators for checking linearity and calibration. It would be a lot easier if I had a variable step attenuator. I have several digital controlled attenuator modules that I bought one […]
Arduino brushless motor control tutorial
Dejan over at HowToMechatronics.com shared detailed tutorial on how to control brushless motor using Arduino and ESC. Check out the video after the break.
Spectrometer on PC
Boris Landoni over at Open Electronics writes, “We use the platform based on the AMS sensors in combination with the Personal Computer and thanks to an ad hoc software we trace on the screen the spectrum curves resulting from the analysis performed.” More info on Open Source Project page.
USB mini media keyboard
Sven Krasser built a small USB keyboard input device for media control and wrote a post on his blog detailing its assembly: The project is based on a Pro Micro, an Arduino-compatible ATmega 32u4 board (the 32u4 allowing to easily create USB devices). For iteration 1, I added a couple of buttons and a rotary […]
Minimal ATSAMD21 computer
Johnson Davies shared detailed instructions of how to build an ATSAMD21-based computer on a prototyping board using a 32-pin ATSAMD21E: If you’re looking for something more powerful than the ATmega328 in the Arduino Uno a good choice is the ATSAMD21. This is an ARM Cortex M0+ processor with up to 256KB flash memory, 32KB RAM, […]
Arduino interface for TFA9842AJ power amplifier
Dilshan Jayakody writes, “I tested a couple of TFA9842AJ based amplifiers in the last couple of years. The main reason I liked TFA9842AJ is its simple, clean design, wide operating voltage, and high-quality bass-rich audio output. Thanks to it’s built-in DC volume control circuit this audio amplifier can easily interface with MCU. In this article, […]
Arduino Shield for CAT M1 and NB-IoT modems
Michael Krumpus designed and built an Arduino shield for Nimbelink Skywire CAT M1 and NB-IoT modems, that is available on Github: Nimbelink has a development kit for use by product developers, but it’s rather expensive. I wanted to try out a Nimbelink CAT M1 modem without the dev kit, and since there are so many […]
ESP32 DHT11/DHT22 web server – Temperature and humidity using Arduino IDE
A how-to on building an asynchronous ESP32 web server with the DHT11 or DHT22 that displays temperature and humidity using Arduino IDE. More details on Random Nerd Tutorials. Check out the video after the break.
miniduino USB
Boris Landoni writes about a new open source project, the miniduino USB: A small Arduino board with minimal hardware but with access to all I/Os, just like the Nano and equipped with PCB-integrated, direct-insertion USB connector: it is basically an Arduino Pen Drive. More details on Open Electronics project page.