superkev

The signal needs 4 wires. The red and black need a constant 16V ac to power the lamp, motor and electronics. The 2 yellow ones change the state of the signal every time they are momentalary joined by say a push button switch.. This means even on a manual layout you need to be able to see the signal to decide if it needs changing. To me the strange electronics must have either been designed by a non railway modeller or [admin edit unnecessary tone removed]

Just bought a 4mm BR upper quadrent to evaluate. Worked for 5 min then expired with no movement and just the lamp lit so prpobably going back to Dapol. Its not super detailed and has no balance weights etc so nice for toy trains or the rough and tumble of the exhibition circuit perhaps. Why they used a blueish LED in the lamp ive no idea. Mechanism is ingenious with a long thin motor and make to stop limit switches and 3 IC's. Strange over-design of electronics where the sgnal toggles every time the 2 yellow wires are joined making it practically useless for working where you cant see what position its in or any sort of automation or DCC. A tortoise point motor system works fine with a motor and 2 limit switches which I think would have been cheaper an simpler. I hear MERG are hope to make a new PCB to allow the signal to be worked by a simple ON-OFF switch or relay. Overall nice signal but strange electronics a big disapointmet to me. Perhaps Bachman or Hornby will make there own versions which can be operated correctley. Kev