So I bought an enlarger head and power supply to use as a light source for my digital film scanning setup.
> pic related
The setup requires a timer to complete the circuit and turn on the enlarger lamp. I don't have a timer. The timer plugs into the back of the power supply.
I only took a basic electrical engineering course in college so I don't know much about this. I'd like to avoid having to buy a timer. Could I use a spare electrical cord, plug it in the back of the power supply, and cut the other end off, connecting the positive and negative wires?
OH wow guy, I just bought a Zenith BnW enlarger for my girlfriend.
She wants to build a dark room so I'm hoping to surprize her. A late new year sort of present.
However didn't get a timer with the unit. Its a simple little unit with a incandescent bulb in the top that just plugs in to a wall outlet.
I figured id just make an Arduino controlled timer with a relay switch and a timer.
But I haven't given it much thought yet.
I kinda figured i'd use a couple of buttons one prolongs exposures buy like x sec another one shortens it by x. 2 more buttons define the incrament, and a third button starts the exposure.
But I'm thinking if I should use an led display, might fuck up exposures :/
>connecting the positive and negative wires?
does not good idea sound. Your manual has no pinouts, or anything useful, but, my guess would be, simply bridging 'to timer' & 'from timer' socket/plug should work.
Can chek with a multimeter as well, measure current on 'to timer' - prob. 110v (or whatever, non murrican) - in which case, you can run any standard timer suitable for high-voltage AC - you get these (manual) in ebay for a couple of bucks, used for light switching, heating, etc. Or digital, for a few dollas more.
As said, only a guess, but bridging those should prob start your fan/ light etc. and, for a timer (optional) anything that interrupts the live line between those sockets would do. Cavaet Emptor, and all, tho.
I yolo'd your advice and success!