I got Tomix's transistor controller and power unit. There was no guarantee, but it works fine.
I drew schematic.
It has been more than half a year since you purchased this transistor controller. How does it work after a while? As far as I understand, you bought this device off hand, because there is no warranty. I am interested in the longevity of such a device and if there are any problems with it. If you find some time, please describe your experience.