RailPro > RailPro Specific Help & Discussion
RP Keep Alive Installation
Alan:
The fluctuating cap voltage measurement tells me you have them incorrectly wired into the circuit. The fluctuation in reading is interaction between the caps and your meter.
emd_16645:
That would be possible. The negative side is wired directly to the yellow wire on the six pin plug, so that side should be fine. The positive side I wired to a common light pin, expecting that would be adequate (it was conveniently located). I will try rewiring that side of the board to tie directly to the blue wire on the 9 pin plug and see how it goes. The board does have resistors installed to reduce voltage to LEDs so that may cause issues as well. I'll report back soon.
emd_16645:
I rerouted the + connection on the keep alive to directly connect with the blue wire on the 9 pin connector. With track voltage applied, it reads a steady ~13.5v. When power is removed, voltage reading drops about .1v per second with negligible load applied. My HC sim has been acting up in the past day, unable to test loaded conditions. Might be time to get a HC-2 soon...
Alan:
That is the desired reading. The voltage drop is due to the LM drawing a small amount of current. I think you fixed it.
emd_16645:
Thanks for the help Alan.
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