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Frequency Counter LS-223 ( Home brew )

[Outline] [Front view] [Top view] [Bottom view] [Block diagram]

[5 stage counters] [1st stage counter for 50MHz signal input]

Fig.1 Gate, 5 stage counter, latch, timebase pwb.

Fig.2 SN74196N for 1st stage counter ( up side down )

Fig.1 and Fig.2 shows the gate, counter, latch, timebase pwb.

SN74196 is used for 1st stage counter to count up to 50MHz frequency. The rest counters are SN74LS90.