A what is this component query.

[Kris]

Earlier this week I purchased a couple of controllers at an auction. These came with some control boards that I can’t identify. Can you suggest what they could be?

[John ks]

This is a guess

Some type of shuttle controller

The clues

On top of the board are Two terminal strips 

If you were to feed power from a DC controller into the 2 terminals on the top LHS (sp6) & connect the track to the 2 terminals top RHS (SP7),

the track power would be reversed by one of the relays (top RHS) & the other relay (top LHS) will turn track power on or off

 

Another clue 

The four terminal strips (SP1,SP2,SP3,SP4) have the following markings "- LED + LDR - "

The - goes to the negative side of a LED (as connected in SP1. this LED would be used for remote indication & is in parallel with LED1 on the PCB) 

The + goes to the positive side of a LED

The + also goes to a LDR (Light Dependant Resistor)

The third terminal of SP1 which looks to have a "-" next to it would go to the other side of the LDR

 

The loop of wire in SP2 is where a LDR would normally be connected

 

The terminal at the bottom centre is marked " + supply -    SP5"  

As at least one of the relays is marked DC12V , I would expect the supply voltage to be 12v DC with + & - connected as shown on the PCB

Hope this helps

 

John

 

 

 

 

[Kris]

7 hours ago, John ks said:

This is a guess

Some type of shuttle controller

The clues

On top of the board are Two terminal strips 

If you were to feed power from a DC controller into the 2 terminals on the top LHS (sp6) & connect the track to the 2 terminals top RHS (SP7),

the track power would be reversed by one of the relays (top RHS) & the other relay (top LHS) will turn track power on or off

 

Another clue 

The four terminal strips (SP1,SP2,SP3,SP4) have the following markings "- LED + LDR - "

The - goes to the negative side of a LED (as connected in SP1. this LED would be used for remote indication & is in parallel with LED1 on the PCB) 

The + goes to the positive side of a LED

The + also goes to a LDR (Light Dependant Resistor)

The third terminal of SP1 which looks to have a "-" next to it would go to the other side of the LDR

 

The loop of wire in SP2 is where a LDR would normally be connected

 

The terminal at the bottom centre is marked " + supply -    SP5"  

As at least one of the relays is marked DC12V , I would expect the supply voltage to be 12v DC with + & - connected as shown on the PCB

Hope this helps

 

John

 

 

 

 

Thanks for that John, I'll take a closer look tomorrow to see if there are any more clues. The really bizarre thing was there were 7 of these in the same box as the controller. 

[Kris]

Here are 4 extra photos to show the details on each edge.

 

[RAF96]

Feeding off the deductions in the earlier reply it would seem the LDR connections could be for an IR sensor to perform the pass-by detection initiating the reversal. Similar other make shuttle devices use diodes across a track break to perform the pass-by detection.

[cliff park]

Just out of interest what is the chip with the capacitor/resistor on top? I can't read it in any of the pics.

[Nickey Line]

One of the relays appears to have suffered a fatal burn-out!

[Crosland]

On 03/04/2022 at 21:02, Nickey Line said:

One of the relays appears to have suffered a fatal burn-out!

Or the soldering iron got a bit close when making the modification.

 

The screw terminals look rusty!

[Kris]

7 hours ago, Crosland said:

Or the soldering iron got a bit close when making the modification.

 

The screw terminals look rusty!

They are rusty, it looks like the box that they were stored in got wet.