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This article describes in some detail how the TellyMate serial to TV adapter works. The TellyMate takes serial data and displays it as a 38x25 character display on a TV screen.
The minimum hardware list is:
As usual, the article is also available on a single-page or as a pdf file if you prefer.
A page of diagrams and (rather terse) notes about the timing and structure of a composite video signal. It's primarily aimed for people who are going to be generating black and white (or grayscale) composite video signals from a microprocessor.
Blinking LEDs have evolved.
This article covers a couple of methods of dimming LEDs using microcontrollers; Pulse Width Modulation and 'Binary Code Modulation' (sometimes known as Bit Angle Modulation). It's primary intent is to introduce Binary Code Modulation to a wider audience. To that end, it has some simple but useable Binary Code Modulation example code. A summary is provided which might help when deciding which dimming method to use. It's also available as a single page or a pdf file if you prefer.
Sometimes you just run out of pins to control your LEDs.
This tutorial shows you a way of independently controlling two LEDs for each microcontroller pin. It goes on to explain how to run 16 LEDs from 8 pins. Schematics and example code are included. It's also available as a single page, more suitable for printing, and as a PDF File.
A quick-reference page to show you how the AVR ISP Headers are laid out. It includes diagrams, photographs and descriptions of the headers. If you've ever got your head in a fuzz over which way round, which way up, and which side you're supposed to be looking from, here's the page for you!
