2016-03-17
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Our computer's clock is built using several 555 timers. The second is configured as a bistable multivibrator to debounce the toggle switch for selecting between the clock oscillator and manual clock stepping. See https://eater.net/bbcpu8-clock-module for more.
Part 1: /youtube/video/kRlSFm519Bo
Part 2: /youtube/video/81BgFhm2vz8
Part 4: /youtube/video/SmQ5K7UQPMM
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You can get all the components used in this video from any online electronic components distributor for a few dollars.
Complete parts list (everything in this video):
- Circuit from parts 1 and 2
- 1x 555 timer IC
- 2x 1kΩ resistors
- 1x 330Ω resistor
- 1x 0.01µF capacitor
- 1x Double-pole toggle switch
- 1x LED
- 22 gauge wire