Fig. 1 Circuit on proto board.
SN7414 Square Wave Generator uses SN7476 JK Flip-Flop
For information on the SN7414 square wave generator see Simple Schmitt Trigger SN7414 Square Wave Generator
The following drawings refer to the above YouTube video.
Fig. 2 SN7414 oscillator with SN7476 JK flip-flop circuit diagram.
Fig. 3 SN7476 pin connections. Note two complete JK flip-flops.
Fig. 4 Differences between SN7476 and SN74LS76 JK flip-flops. One is positive edge triggered, the other negative edge triggered respectively. Note the truth tables.
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