Modding a classic Atari 2600 Junior for AV out #Vintage #Atari #Modding @tynemouthsw
The Tynemouth Software blog posts about modding an Atari 3600 Junior. Most consoles of the day had RF out to a TV for display. Today, it’s an art to subtly tweak designs for composite video out to a monitor.
This one is a little different, in that it does not have a modulator inside a metal can like most other 2600 boards. Normally that section has a metal can UM1233 (or equivalent) modulator. There is not much information about a composite video conversion on this type of board, so I thought I would go through my process for working out which parts to remove, and where to tap the necessary signals.
The post goes through looking at the CA3086 driver chip and looking at the schematic to see what the designers were doing at the time.
The post goes into all the details. The modded board is a thing of beauty.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.