SCRG Switch a Slot schematics?

12 posts / 0 new
Last post
Offline
Last seen: 1 year 1 week ago
Joined: Aug 10 2019 - 19:16
Posts: 10
SCRG Switch a Slot schematics?

Does anyone know if a schematic exists for the SCRG Switch a Slot? Seems like the Switch a Slot is pretty rare and the chances of finding one even slimmer. Was wanting to make one instead, but cant find any schematics on it.

tokabln's picture
Offline
Last seen: 1 week 2 days ago
Joined: Dec 30 2015 - 10:48
Posts: 212
Well I don't have the

Well I don't have the schematic but you might be able to get a clone board

http://a2central.com/wp-content/uploads/sites/3/2008/07/littleexpanderplus.jpg

from here:

https://a2central.com/1552/kfest-2008-saturday-report/

Offline
Last seen: 1 year 1 week ago
Joined: Aug 10 2019 - 19:16
Posts: 10
They don't seem to be sold

They don't seem to be sold anymore.

Offline
Last seen: 1 month 3 weeks ago
Joined: Jul 5 2018 - 09:44
Posts: 490
Are they really that rare?  I

Are they really that rare?  I've got one that I've had for years.  It's a pretty simple device.  I'd expect some of the parts in it may not be that easy to find anymore though.

 

 

Offline
Last seen: 1 year 1 week ago
Joined: Aug 10 2019 - 19:16
Posts: 10
softwarejanitor wrote:Are

[quote=softwarejanitor]

Are they really that rare?  I've got one that I've had for years.  It's a pretty simple device.  I'd expect some of the parts in it may not be that easy to find anymore though.

 

 

[/quote]

Doesn't seem like it would be hard to make based on the blurry images of it, and the images of the LittleExpanderPlus. 

I'm just surprised there's not a active product for a slot switcher.

Would you possibly be interested in selling yours?

Offline
Last seen: 1 month 3 weeks ago
Joined: Jul 5 2018 - 09:44
Posts: 490
I'd never really thought

I'd never really thought about selling it.  I was trying to sell some other Apple II gear a while back and it was such a hassle I gave up on it.

 

macnoyd's picture
Offline
Last seen: 10 hours 39 min ago
Joined: Oct 15 2012 - 08:59
Posts: 603
Can you post a couple of clear photos of

Can you post a couple of clear photos of the front & back of the card?

Thanks in advance.

Offline
Last seen: 1 month 3 weeks ago
Joined: Jul 5 2018 - 09:44
Posts: 490
Which card?  The little card

Which card?  The little card on the Switch-A-Slot that plugs into an Apple II slot has pretty much nothing on it.  It just maps the pins to wires that run in a bundle to the box.  The box has a PCB in the bottom of it that has the slots in it and the rotary switch on the front of the box attaches to that PCB.  I think it pretty nearly mechanically switches some of the key signals.  The PCB in the box doesn't have much on it.  It's just a really simplistic device.  Anyway, I really don't want to take it apart enough to take a picture of the bottom side of that PCB.

 

Edit -- I guess you mean the Littlejohn board.  Unfortunately it appears all of his stuff is out of production these days.

 

 

 

Offline
Last seen: 1 year 1 week ago
Joined: Aug 10 2019 - 19:16
Posts: 10
Well if you ever want to get

Well if you ever want to get rid of it hmu.

Offline
Last seen: 1 month 3 weeks ago
Joined: Jul 5 2018 - 09:44
Posts: 490
So on the Littlejohn designed

So on the Littlejohn designed board, my question is where does the rotary switch hook up to select the slot?  Or am I missing something?  I understand they've added a power plug for an ATX or ITX style power supply but it doesn't look like it is a clone of the SCRG in other ways than that.

 

 

Offline
Last seen: 1 year 1 week ago
Joined: Aug 10 2019 - 19:16
Posts: 10
softwarejanitor wrote:So on

[quote=softwarejanitor]

So on the Littlejohn designed board, my question is where does the rotary switch hook up to select the slot?  Or am I missing something?  I understand they've added a power plug for an ATX or ITX style power supply but it doesn't look like it is a clone of the SCRG in other ways than that.

 

 

[/quote]

Solder to the back of the board based on this image.

Offline
Last seen: 1 month 3 weeks ago
Joined: Jul 5 2018 - 09:44
Posts: 490
Thanks, that is a much more

Thanks, that is a much more useful image to show how that thing really works.

 

 

Log in or register to post comments