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Old 2nd Oct 2019, 12:27 pm   #1
G6Tanuki
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Default Kodak Carousel slide-projector - remote-control?

An ancient friend has an equally-ancient Kodak "Carousel" 35mm slide-projector and around 50 carousels loaded with slides, dating from his time as a Professor of Architecture.

The projector still seems to work - and there's a box of several new replacement bulbs - but the hand-held bit of the remote-control has been lost somewhere over the years.

The 'receiver' for the projector-end is a small black oblong box with a transparent window on the front, and a short flylead with a DIN-plug on the end, which plugs into the projector.

Does anyone know anything about how this works? I'm assuming the link is infra-red (it allegedly provided next-slide/last-slide buttons and a focus control).

My hope is that I can somehow lash-up a simple box-with-buttons-on-a-wire for him and plug it into the DIN-socket on the projector, rather than trying to divine the particular IR wavelength used and encoding-method.

[It's not helped by him being 400 miles away].
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Old 2nd Oct 2019, 12:47 pm   #2
Nickthedentist
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Default Re: Kodak Carousel slide-projector - remote-control?

Have a look here:
https://www.google.com/url?sa=t&rct=...z0EoW4QKuUdeNT

Google is your friend, as they say

Cheers,

Nick.
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Old 2nd Oct 2019, 12:49 pm   #3
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Default Re: Kodak Carousel slide-projector - remote-control?

Or if money's not a problem, https://www.ebay.co.uk/itm/Kodak-Car...wAAOSw~kJdY63D
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Old 2nd Oct 2019, 1:19 pm   #4
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Default Re: Kodak Carousel slide-projector - remote-control?

I am not sure how standardised the remote controls were across the Carousel range (my guess is that they were), but the pinout I have for the 6 pin DIN socket is :

1 : change reverse
2 : change forwards
3 : +ve supply
4 : focus motor
5 : focus motor
6 : -ve supply

The slide change buttons are wired between +ve (pin 3) and pin 1 or pin 2 as appropriate. The focus switch is essentially a centre-off DPDT thing wired as a reversing switch. Inputs from +ve and -ve (pins 3 and 6), output to the motor (pins 4 and 5).

And yes the wired remote control is just switches.
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Old 2nd Oct 2019, 1:37 pm   #5
G6Tanuki
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Default Re: Kodak Carousel slide-projector - remote-control?

Thanks for the suggestions and directions! I think I see a way ahead here, the switchery looks easy to replicate and fit in a small box; likewise a length of old cat.5 Ethernet cable and a 6-pin DIN are in my junkbox.

[My friend wants to review the slides, and identify those he wants to get digitised for inclusion in his memoirs].
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Old 2nd Oct 2019, 2:33 pm   #6
TonyDuell
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Default Re: Kodak Carousel slide-projector - remote-control?

Looking at the diagram I have more carefully, it appears that the focus switch was designed to short-circuit the focus motor (providing dynamic braking) in the centre (off) position. Whether this is terribly important I don't know. A couple of SPDT (changover) momentary pushbutton switches could be wired to do that, press one to focus one way, the other to focus the other way.

The 'change' buttons seem to be just normal press-to-make ones.

I have a scan (which I found on a website somewhere) of the user manual for a high-end Carousel (with a connector for an external triac to control the lamp, possibly autofocus, etc). It includes the full circuit diagram of the projector and wired remote control. If it's any use to you, PM me with your e-mail address and I can send it to you.
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Old 2nd Oct 2019, 3:03 pm   #7
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Default Re: Kodak Carousel slide-projector - remote-control?

If you use two separate non-locking SPCO switches for the focus motor, you will get the "shorting" action with both switches at rest anyway. (Pin 4 to common contact of one switch, pin 5 to common of other switch, positive supply to both NO contacts, negative to both NC contacts).

This will stop the motor quickly on release, and might give you better control if there is any tendency for it to overrun if the armature has much inertia. I don't think this is especially likely; the reduction drive will give it an easier time, but will also reduce the amount by which it will move under its own stored energy.

(That was also exactly how I wired up the volume control motor on my Seeburg ESL100 .....)
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Old 9th Oct 2019, 9:53 pm   #8
G6Tanuki
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Default Re: Kodak Carousel slide-projector - remote-control?

I've made up a box with four suitable push-button switches [forward/back, focus in/out] and a 25-foot wire with a DIN-plug on the end - this is on its way to Scotland as I speak. Hopefully it will do the trick and allow my architecturally-inclined friend to properly check-out his sets of slides of things like 1950s Marks&Spencer shops and 1960s "National Benzole" petrol-stations!
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Old 9th Oct 2019, 10:26 pm   #9
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Default Re: Kodak Carousel slide-projector - remote-control?

Sounds interesting, look forward to seeing his book, maybe.
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