The Nixie Clock From Outer Space

Nixie clocks are very little new. But [CuriousMarc] has a person with a one of a kind pedigree: the Apollo Software. Although restoring the Apollo’s Central Timing Equipment box, [Marc] made the decision to toss together a nixie-centered clock. The avionics unit in problem despatched timing pulses and a mission elapsed time signal to the rest of the spacecraft. Oddly enough, when it experienced an inside oscillator, it was only utilised for the duration of failures. It normally synched to the direction computer’s onboard clock.

There is a in-depth rationalization of the unit, along with some of the ancillary equipment and panels. Much of what the output from the device is driving counters to screen timers, even though some of the clocks push other items of devices, like the telemetry commutator, which time stamps each telemetry frame.

[Marc] reminds us of an archeologist using X-rays and other applications to study the scarce components. Some of the connectors are pretty unusual these days, as well, and require some customized boards. The nixie clock relies upon on an previous HP counter. The counter had an output that sends the BCD digits obvious on the screen. [Marc] intercepted the connections there and permitted the connector to acquire the digits alternatively of sending them.

The modification included getting rid of some buffer ICs and changing them with sockets. If you plug the primary ICs in, the counter is effective as before. If you plug in a distinctive substitute board, you can use the counter as an externally-pushed nixie screen.

We have been pursuing [Marc’s] exploration of the Apollo equipment for some time. This isn’t the initially time we have noticed an old counter used in a clock undertaking, either. out?v=GkLLCv1meyU

Luis Robinson

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