Simple polarity reversing switch. L1 and l2 are the limit switches a standard micro switch.
Turnouts
Automatic reverse polarity switch. Please dont flame because its already been donesecond this is my first instructable. How do protect reverse polarity switch and alert automatic reverse polarity switch using relay. The relays a and b are set up as an h bridge. To keep the train moving forward you must also change the direction on the throttle. The toggle switch will reverse the polarity of the rails in the reversing section once the train is in the loop. Simple reverse polarity alarm circuit.
No external power required runs off track power. We apply the dc voltage to input in the correct polarity. Some boards to consider are. Auto reversing manages polarity mismatches on the reversing track section without manually throwing electrical toggle switches or adding another booster. First thing first i know there are other instractables for this i just wanted to show my version. Contacts a2 and b2 are used to keep the relay on until the other limit switch is reached.
When this happens the train will also reverse direction. If you throw both switches simultaneously you can do both while the train is in motion. Automatic polarity reverser units are possible with dcc due to the highconstant voltage on the rails. Industec 30 amp rocker switch polarity reverse dc motor control momentary automatic reseting 12v 3 position double pole double throw 43 out of 5 stars 7 1550 15. Contacts a1 and b1 will reverse the direction of the motor when one relay or the other is energised. 8 amp peak 6 amp continuous auto reversing control for a single reversing district.
Analog does not maintain a constant on rail voltage varying voltage level being the inherent speed control and therefore cannot do auto polarity switching. Simple to wire 4 wire hookup no locomotive wiring required. This is a simple reverse polarity alarm by sound buzzer and light led display. I have writen another but do not have a camera to take p. However all is not necessarily lost. Control signal dc voltage motor reversing switch you can use a 1 channel dpdt opto isolated relay board or a 2 channel spdt relay board with an external control signal to reverse the polarity of a dc voltage.
12vdc 1 channel isolated io dpdt relay board module ct024. Industec 30 amp rocker switch polarity reverse dc motor control momentary automatic reseting 12v 3 position double pole double throw 43 out of 5 stars 7 1550 15.
Gallery of Automatic Reverse Polarity Switch
