markojal
Newbie level 3
Hello,
I came across this forum and hoped someone could help me with a small project This is what the project does.
For model railroading I have 2 sets if tracks . I have a Train on one and a Trolley on another. When the train passes near the trolley I want it to be active. When the trolley is out of sight of the train I want it to be inactive. Both train and trolley are simple DC motor devices.
Additionally, when the trolley reaches the end of the track it needs to reverse polarity of the power supply, causing the trolley to move in the opposite direction.
I found this circuit online and saw the momentary switches as reed switches . The reed switches can easily be triggered by a passing train. It is the firs one on this page.
https://www.electronics-lab.com/project/simple-soft-latch-switch-using-push-button/
This made perfect sense for on/off and a second identical circuit triggering a DPDT elay would do fine for triggering a forward/reverse change.
I put together what is in the attached file, however I lack specific component values.
Can anyone help me with specific component values and confirm my work? I am also worried I may have polarity reversed to transistors or diode. .
Thanks
Mark
I came across this forum and hoped someone could help me with a small project This is what the project does.
For model railroading I have 2 sets if tracks . I have a Train on one and a Trolley on another. When the train passes near the trolley I want it to be active. When the trolley is out of sight of the train I want it to be inactive. Both train and trolley are simple DC motor devices.
Additionally, when the trolley reaches the end of the track it needs to reverse polarity of the power supply, causing the trolley to move in the opposite direction.
I found this circuit online and saw the momentary switches as reed switches . The reed switches can easily be triggered by a passing train. It is the firs one on this page.
https://www.electronics-lab.com/project/simple-soft-latch-switch-using-push-button/
This made perfect sense for on/off and a second identical circuit triggering a DPDT elay would do fine for triggering a forward/reverse change.
I put together what is in the attached file, however I lack specific component values.
Can anyone help me with specific component values and confirm my work? I am also worried I may have polarity reversed to transistors or diode. .
Thanks
Mark