Don Lancaster, best known to retrocomputing denizens as the man who developed the TV Typewriter, died at the age of 83 on June 7. His classic book (after the TV Typewriter Cookbook) described building a TVT 6 5/8 on anything with a 6800 bus like the 6502 and, yes, the 6800. This was a CPU-driven display that uses lines on the address bus to control the image: you lost 36K out of your addressing range as any address stored to or read there would be passed to the display interface, but gained an entire viewing screen in exchange. Even a barebones 1K KIM-1 could display a 32×16 text screen at $0200 to $03ff and it could be built out of just a handful of chips.
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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.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
