I’m seeking your guidance on how to best manage my need for various power sources of different types.
I’m building a circuit that will act as a « mother-clock » for a relatively old « daughter-clock » (from 1952!) that operates by receiving specific impulses. You might have seen those at train stations for example (i.e. the clocks would be relatively « dumb » and be controlled by a central high-precision system).
The clock I’m working on right now requires:
- 230V AC - this is to switch on the internal bulbs at night (note: this is in EU, so no conversion required here, this is the main voltage)
- 48V AC @ 50Hz - synchronous motor, needs to be constantly on (note: this is in EU, so the main frequency is already at 50Hz, no conversion required here)
- 24V DC - used to generate impulses every minute (either 24V or -24V, in alternance)
And, on top of that, I also need to power my Arduino, which, depending on the device/input I pick could be anywhere between 3.3V and, say, 12V DC.
So, I should ignore the 230V bit I suspect as I might want to control it through other means and not mix high-voltage with the rest. Correct?
But then, I’d like to avoid if possible to have 3 different transformers to generate my 48V-AC/24V-DC/12V-DC, especially as I’d really like to have my system i) take relatively little space (and. 3 transformers all hooked into 230V won’t help) and ii) ideally, minimize the cabling going into my system (this is for aesthetic considerations given where I might put the system).
What’s your advice on this? How would you go at it?
Thanks for your lights!