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Minute repeater (hour part) using relays.
The C-contact switch at the bottom centre sets the hour, usually 0-23 (BCD).
The switches on the left have the following functions from the top.
1. manual clock input (push switch)
2. automatic/manual clock setting (C-contact switch)
3. start of operation (push switch)
When the activation switch is pressed, the SR latch for the ringing mode is turned on, and the input value is passed through the 24H to 12H decoder and then stored in the register for time storage.
At the same time, the binary counter is activated and counts up, comparing the value with the value in the register.
When both values are the same, the clock is input to reset the SR latch and returns to the initial value.
The delay circuit in the lower right is unnecessary in the actual circuit, but was added because the response speed of the simulator's lamp is unusually fast.
When completed as a minute repeater, a special counter for ringing must be inserted before the clock input to this circuit.
I have already completed the whole minute repeater circuit, but unfortunately the simulator space is too small to draw everything in.
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