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4 Microphones Mixer Preamplifier

“Some time ago I was asked to solve the following problem: a small choir plays a number of four fixed microphones. The audio signals from these four microphones had to be amplified, mixed and the resulting signal had to be …

8 Channel Inductive Load Driver Arduino Shield

“The 8 Channel Driver Arduino UNO Shield is designed to enable users to switch inductive loads for up to 800mA each channel and up to 24V DC with no heat-sink needed. It is ideal for such applications as driving 2x …

Arduino Soil Moisture Monitoring Stick - Never Forget to Water Your Plants

“Do you often forget to water your indoor plants? Or perhaps you give them too much attention and over water them? If you do, then you should make yourself a battery-powered soil moisture monitoring stick. This monitor uses a capacitive …

ATtiny85 Wearable Vibrating Activity Tracking Watch

“How to make the wearable activity tracking watch? This is a wearable gadget designed to vibrate when it detects stagnation. Do you spend most of your time on the computer like me? Are you sitting for hours without realizing it …

“Connect” to an atomic clock in space! GPS, DCF77

“This project is a clock with radio receivers which can receive the exact time from the GPS satellites or from the DCF77 transmitter. This project is a clock with radio receivers which can receive the exact date and time from …

FPGA to FPGA IR Communication

“Communicating between FPGA up to 40 metres apart using IR modulation. Processing at the edge is a rapidly increasing application for embedded systems, often these edge nodes are connected using a RF link e.g. Zigbee, WiFi etc. However, there …

GardenPi powered by Neptune. py

“Highly scalable and powerful irrigation / hydroponic & aquaponic control system managing up to 32 zones with automation and sensors. Overview & Theory of Operation GardenPi, powered by Neptune.py is designed to manage, monitor, and control a series or sprinkler valves and …

Getting Started with STM8S using STVD and Cosmic C Compiler

“Last time we examined how to program the STM8s microcontroller using the Arduino IDE. This way may work for developers who are familiar with the IDE and want to build quickly, and professional projects, but there are more ways to …

Hall Effect USB Joystick

“This instructables show how to use a industrial Hall Effect joystick to make a high presision USB joystick. There are another related instructables Tiny USB Joystick that can provide low cost solution ;> Normal USB joystick use 2 potentiometers as sensors …

How to Build SMARS Robot - Arduino Smart Robot Tank Bluetooth

“To build the basic model of SMARS robot you just need few parts. Divided into two main parts, 3D printed parts and electronics components. For 3D parts you can print yourself using a 3D printer, you can download the complete …