Timers - one for enthusiasts

[Turnip]

Hi folks,

As I try mend most anything, have an old GPO pulse clock where customer needed a driver giving a single pulse 30 seconds apart and reset facility.

Initially used a modern clock movement with a modified minute hand and an opto interrupter, plus a multivibrator giving fast reset as pulse clock has no mechanical reset.

Works fine, but seems rather crude in this day and age - any thoughts on something more digital, or might be taken for one of those ancient valve chaps - whatever valves were (good PD500s for sale - an exceptional audio triode for currently trendy, low 3rd  push-pull audio amps with a modest 25KV HT supply, have no suitable output transformers though) - Chris.