Found some pushwheel / thumbwheel switches for TIME!

[Moses]

I forgot I had this! I found a box of old BCD output thumbwheel switches marked with the time. Hours 1-12 and minutes at 5 increments. Maybe for an alarm input? Would need a switch for AM/PM.

What else can it be used for ??

I don't need all the quantity I have.. so if anyone wants some PM me.

Thanks!

Regards,

-Moses

[Nick Andrews]

Looks like some used in counters and timers in NIM and related nuclear physics stuff.

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[Benoit Tourret]

I found those thumbweels, but they are DCD decimal coded decimal, 10 outputs, easy to tests nixie, but I stopped at 3 nixie !!!

how did they manage to count in binary up to 59 with 4 bits ???

[gregebert]

The manufacturer "cheated", because they only display in increments of 5 minutes. So, with 4 bits you can get just over 1 hour.

I use 4 BCD thumbwheel switches in my upcoming alarm clock, so that burned-up 16 bits. But since I read them thru a serial interface that is shared with other switches and LED's, it doesn't require additional pins from the CPU or FPGA, but it does take additional shift register ICs.

[Terry S]

I used similar switches in custom test equipment I built decades ago.