669cpb

I have tried this with a simple prototype but must be missing something. At least I have the signal lit with the opposite polarity but both lights are lit with the red one not as bright. This is without anything connected to the diode. If I then link the diode to the 0v DC to simulate input to the diode the red light goes out. Not sure if the photos will help show what I have done? Apologies if I have done something stupid here but have never used diodes or transistors before.

Thanks Rick. Will study this in more detail later and see if I already have any diodes and transistors to try it with. Cheers Chris

Yes the resistor is on the black wire

Thank Rick-H. If you could provide a circuit diagram that would be great as I don't fancy having to rewire about 50 leds.

I have been working on building a control panel using Seep PM1 motors, LED route indicators and 2 aspect signals. As the signals were coming from China I built the panel whilst waiting. The led route indicators work correctly and I added a bi colour led on the panel to show the state of the signal which is also working correctly. Now the signals have arrived and so I connected them to the panel/point motor and nothing. looking at the instructions, the red and green wires are on the negative part of the circuit with the black wire positive. The instructions say the black wire is the anode. Now my my panel has the switches on the positive side. So I can swap things around and can either have the panel leds all working correctly but no signal or the signal working but no route or signal indicators working. The panel wiring is based on https://www.brian-lambert.co.uk/Electrical_Page_3.html Seems odd that the signals operate differently. I thought leds were all wired the same way? Any ideas on how I can get this working without rewiring the panel as it took about 2 days per panel to do and I have three, two completed so far? Thanks in advance Chris

Thanks again Phil

Thanks Phil. Interesting info about the 3 wires as an alternative I found is this which may not be suitable now? https://www.amazon.co.uk/TAIFU-Universal-Switching-Selectable-Compatible/dp/B07GQVJX8L/ref=sr_1_17_sspa?ie=UTF8&qid=1550994322&sr=8-17-spons&keywords=15v+psu+4a&psc=1 I could always get a separate correct sized plug and solder it and use the one in the first link.

Hi, Will this power supply be ok to use with Hornby Select controller? https://www.ebay.co.uk/itm/15V-4A-PA3377E-2ACA-Toshiba-Laptop-Charger-Power-Supply/170619596045?hash=item27b9b86d0d:g:LBYAAOxyFKZQ294I:rk:4:pf:0 Many thanks Chris