[2 Pack] DC 6-30V Timer Relay Programmable Delay Relay Module Cycle Timer with LED Display / 5V Micro USB, Smart Home Controller

I used this relay as a timer on Lionel train display. My gateman is hooked up to a short piece of track, so he would toggle in/out in between the trucks of the cars. I used this relay with 0.7s delay using the P1.2 mode, so that it would trigger when the first car went by and reset the timer as the remaining cars went by. Worked perfectly. Now my gateman comes out when the first car comes by and stays out until the last one passed by. Very happy with this purchase. Programming: A bit awkward, but it works. I had to read the manual a couple times to get the programming of the time correct. Overall though, there are a lot of options, this is an extremely flexible design. My only gripe is that the instructions are not printed. In case this listing is ever removed, I saved the instructions in a text document. Power: For power, I hooked the 18VAC from the train accessory into a KBP310 bridge rectifier, which yielded 15VDC. I then added a 470uF capacitor. Note, if the capacitance it too low, the unit will not power up. Trigger: I ran the 18VAC train accessory power into the "Trigger" input. I ran the ground trigger from the track to the "GND_t" input. No optocoupler needed. Nice. On the output, I ran track ground into the COM and the NO (normally open) output to the gateman. So when the unit is triggered, the relay will close, the gateman will be grounded, and the gateman will come out (assuming you hook up power to the side of the gateman).

Instruction are on you tube and are confusing but works

Funciona bien

Worked great for my project. Was easy to understand and connect Should work for quite some time

I have a bunch of animated Halloween decorations with the dreaded sound sensors that don't work for 💩 I wire the Try Me plugs into the relay and set them up to trigger them every minute or so. I use the P3.2 settings for this purpose. The programming instructions are in the product description.