JK flip-flop racing

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Genre: Education

Family friendly? Yes

Wilson score: 0.9872

Rating: 4.9714 / 5

Engagement: 2.17%

Ben Eater

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Shared January 15, 2017

In this video, we build the JK flip-flop described in my previous video (https://youtu.be/F1OC5e7Tn_o) and find out it doesn't work properly. I demonstrate "racing" (aka "race around" or "race condition") in a JK flip flop.

Support me on Patreon: https://www.patreon.com/beneater

If you want to build this (broken) circuit, 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):
- 1x 74LS02 (Quad 2-input NOR gate)
- 1x 74LS11 (Triple 3-input AND gate)
- 2x LEDs
- 2x Momentary "Microtivity 6mm tact switch"
- 3x 1KΩ resistors
- 1x 100Ω resistor
- 1x 0.001µF capacitor
- 22 gauge wire
- 5 volt power source (e.g., a USB phone charger)
- Clock circuit from https://youtu.be/kRlSFm519Bo