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Frequency Counter LS-223 ( Home brew )

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

[Pre-amplifire, pre-scaler and 10MHz clock osccilator]
[5V AVR pwb and capacitors for power supply]
[BCD to decimal converter (nixie tube driver)]

Fig.1 Pwb for nixie tube and driver ICs

Fig.1 shows Pwb for nixie tube and driver ICs. 5 BCD to decimal driver ICs (SN74141N) are mounted on the pwb. Nixie tubes and the pwb are fixed to a sub panel. The leads from the nixie tubes are wired to the pcb directly.