Setting up ESP8266 based DS18B20 sensor temperature monitoring with Emoncms

esp8266 ds18b20 emoncms

If you are looking for ways of measuring and logging temperature data online, then you can try this one. Jhon_Control describes his setup in this instructable where uses ESP8266 module as microcontroller platform where DS18B20 probe is attached. As you may already know, ESP8266 has two programmable GPIO where one was used for reading temperature using 1-wire protocol. The temperature data is sent via wireless interface, but additionally it can be read via serial interface where other debugging information is present. The other part of project is where temperature data goes. He has chosen OpenEnergyMonitor (Emoncms) – the web platform which can be freely installed on your local host computer and even Raspberry Pi. Here you can have nice representation of data including graphs, history, calculations, and other fancy stuff. … Continue reading

Arduino based cellular automata

Arduino cellular automata

You have probably heard of Game of Life. It is popular cellular automata simulation game where you create simple structures in infinite plain and watch the life evolve. All this is achieved by implementing several basic rules. By implementing different rules, you can simulate biological processes, model structure behavior and program robot swarms. Building cellular automata is fairly simple. You can start with Arduino Nano and 128×64 OLED to get pretty interesting results. In this following project the Game of Life has been implemented. There are only two rules applied to pixels to make it work: 1. A cell which is dead and is surrounded by exactly 3 alive cells, will be born 2. A cell which is alive and has either 3 or 2 alive cells will remain alive, … Continue reading

Arduino based Spot welder for 18650 batteries

spot welder

Lots of devices are using battery packs that are spot welded together. Spot welding ensures great connectivity and vibration safe operation. In order to spot weld you need special equipment that can give high current output for very short time duration. This way you can get good weld joints without damaging the batteries with heat. Building a spot welder for small tasks is fairly easy. KaeptnBalu has shared his instructable where he assembles his spot welder which is controlled by Arduino Nano. Spot welder require 7-12V power source capable to output high currents. So any lead acid battery works fine. Arduino is used to control welding pulse duration which can be adjusted from 1 to 20ms. With 0.15mm nickel strips he found that 9ms gives best result. First of all … Continue reading

Attiny10 miniature breakout board

attiny10_breakout

If you want your microcontroller to fit in tight spaces you need to use very small packages. One optin is to choose Atmel Attiny10 microcontroller which is really tiny. It has 6 pins, where 4 of them are I/O. It features 1KB of Flash, 32B of RAM and can be clocked at 12MHz. Power supply can vary between 1.8V to 5.5V. They come in two types of packages – SOT-23 and UDFN. Dan Watson have built a mini breakout board for Attiny10 mincrocontroller. He wanted it to be really small and came out with size similar to 5mm LED head. To reduce size, he used small pitch (0.05”) header pins that doesn’t fit to breadboard. So additionally he made a special adapter board to be able to program it with … Continue reading