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
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
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
The HC-SR04 works as follows: Send a 10us HIGH pulse on the Trigger pin. The sensor sends out a “sonic burst” of 8 cycles. Listen to the Echo pin...Read More
In a previous post, I talked about serial communications with an ATmega168. But that chip has USART - hardware support for serial communications....Read More
Like many folks, I got introduced to microcontrollers through the Arduino platform. The ease of setup, simple language syntax and the availability of...Read More
I just got hold of an HC-SR04 Ultrasonic Sensor Module. This is a short post on hooking it up to an Arduino Uno and getting distance information from it....Read More
Say you have a microcontroller circuit that does something when it goes dark. To save power, you want to put the chip to sleep when the ambient light ...Read More
This is a small project that I worked on last year. I have a desk made of dark wood, and it was very difficult to see what was inside the bottom...Read More