I had previously written about using the ESP8266 WiFi module to make an Internet Of Things (IoT) device that plots temperature data on the web, at...Read More

The ESP8266 is a WiFi module that costs less than 5 USD. This makes putting your sensors on the net actually feasible. (Hooking up the $75 Arduino...Read More

The 8 pin male dual row headers on some of the small peripheral boards (for example NRF24L01 and ESP8266 boards) are not suited for a...Read More

Feeling left behind, I too want to get on board the Internet Of Things bandwagon by putting a sensor on the net. For this experiment, I decided...Read More

I was looking for a simple voltage boost circuit for one of my projects, when I came across a circuit called the Joule Thief. This cool sounding circuit is ...Read More

When you first study recursion, you will invariably run into a "factorial" example. But if you are lucky, you will also run into a far more interesting...Read More

I have been reading Miller & Ranum's e-book on Python/Algorithms. (A superb book which is also free online.) While looking through their chapter...Read More

I am working on a "weather monitor" project that involves a Raspberry Pi taking to a DHT11 Humidity and Temperature sensor and serving...Read More

I have been looking at prototyping with some ARM Cortex M4 chips, and many of them use a 48 pin LQFP packaging. Sadly, I haven't been able to find a decent 48 LQFP to DIP adapter...Read More

I just got the batch of ATtiny85s I ordered for some pals at a local Maker group. I have articles here on ATtiny84, but not on this chip. So here are some quick notes on getting started...Read More

My friend asked me the following yesterday: "Is it possible to make the build script at my company flash some lights when it fails?" I gave her some suggestions which involved the...Read More

I am feeling a little nostalgic. So I rebuilt one of the first circuits I put together when I started messing around with circuits in eighth grade. It's a very simple beginner project, and...Read More

I want a pan/tilt scheme for the camera of my Raspberry Pi based home monitor robot. But rather than use a pan/tilt bracket with two servos, I thought I could simplify ...Read More

I am working on a Raspberry Pi based robot, and recently acquired a Dagu chassis and a Dagu Mini Driver for this project. As soon as I ...Read More

Here's a short post on communicating with the raspberry from your phone's browser. Our goal is to turn an LED connected to the Pi on and off...Read More

I wanted to design a circuit to generate a nice digital pulse (for input to a microcontroller or the Raspberry Pi) every time an LDR is quickly obscured...Read More

This is how I develop code on my Raspberry Pi: ssh into the Pi from my Macbook Pro from 2 Terminals, and use emacs on one to edit the code, while I ...Read More

This is a short post on getting audio setup on my Raspberry Pi and then making it speak. For the audio setup, I followed instructions on this website:...Read More

I have a couple of servos on a pan/tilt bracket that I want to control from my Raspberry Pi. As I started looking at options, I read about the Adafruit...Read More

I was recently reading about Conway's Game of Life - a cellular automaton discovered by British mathematician John Conway in 1970. Using 4...Read More

This is a short post on setting up the Raspberry Pi (RPi) for development for the first time. Being that the RPi is a full-fledged mini computer, it seems...Read More