Electronics

There are 5 Massoth DiMAX Digital Power Units (One DiMax 1210Z Digital Central Station and four DiMax 1202B Digital Boostersand signals) providing DCC power for nine blocks. Each DiMax power unit has a Mean Well 24VDC power supply. Also, there is a 5VDC power supply for the LED signals. A 12 VDC power supply for the RasberryPi computers, and a 24VDC power supply for the track switches.

This is an example of a control box outside next to the items to be controlled. There are 3 RaspberryPi3 computers operating three 16 Relay boards.Each Signal LED is conencted to a relay. Each switch is connected to a relay. Normally the switches would need two DPST relays each; but the switches are only SPDT. There is a master relay that control the polarity of the switch circuit. This requires that the software set the polarity relay to +- or -+ and then select a switch relay. The switch relays are pulsed while the signal relay are on/off. All of the signal LEDs can be turn on at the same time and even pulsed for testing. All of the switches can be switched at the same time.
Control Box for electronics
Picture of the threee relay boards with the RasberryPi3 computers before installation.
RasbeeryPi3 and Relays