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#eeprom#7-segmentdisplay#breadboardcomputer

Build an 8-bit decimal display for our 8-bit computer

Ben Eater

1.4M subscribers • 36 videos on Hallway

YouTube

Intermediate. Assumes working knowledge.

1M views9 years ago2 recommendations

HardwareElectronicsRetro computing

Ben Eater demonstrates how to build and program a multiplexed 7-segment decimal display for an 8-bit breadboard computer using an EEPROM.

In this video, we'll use an EEPROM (28C16) to create a decimal display for an 8-bit value. The display uses multiplexing to drive four digits using a single EEPROM. As a bonus it supports both unsigned and signed (twos complement) display modes. Support me on Patreon: patreon.com/beneater The code used in this video for programming the EEPROM is available here: github.com/beneater/eeprom-programmer/blob/master/multiplexe… See eater.net/bbcpu8-output-register for more info. Parts list for the finished decimal display: - 1x 28C16 EEPROM - 1x 555 timer IC - 1x 74LS76 (Dual JK flip-flop) - 1x 74LS139 (Dual 2-line to 4-line decoder) - 4x Common cathode 7-segment displays - 1x 1k resistor - 1x 100k resistor - 2x 10nF capacitors

Why it's here

2 people recommend this

What people say. Recommended as an excellent tutorial on hardware-level decimal decoding and multiplexed display design.

u/nitro_oravain r/FPGA • Recommends

On “[deleted by user]”

Here's a good video on 7 segment decoding: link to this video The implementation is quite laborious, but there's also another video that basically uses memory to decode the values. Here's that one: link to this video
2View on Reddit

u/c0de854-Tin r/compsci • Recommends

On “A new old computer”

You can start this way: link to this video this is a good channel, with greatest projects.
1View on Reddit