Recent content by fabiobollinge

To me it seems like the SPDT only has 3 'legs', and can only be integrated into one circuit? I might be mislead by this, how would I use an SPDT with two independant circuits without having them connect with each other?

I need a sort of relay which takes only about 6V in the electromagnet, but can handle line current in the connector? It would also be preferable, not necessary, that it's inverted, so when there is power to the coil, the connector is disconnected, and when no power is in the coil, the connector...

Hey again! So I tried working this into a larger circuit. But my team is going to try to use photoresistors, so when smoke blocks a laser beam, the resistance goes up, and that acts as opening the switch. Here's the circuit I made using help from above (posts above this one ;) ). The idea is...

Thanks! I used that idea, but I used two transistors! I got away with having a 1M resistor on the switch closed circuit, then that current is enough to just barely open the first transistor, but the small current from that is enough to nearly fully open the second transistor, lighting the LED...

This works excellently, however the only way for it to work excellently is to allow a large current constantly through the trip wire. And for my project the current through the trip wire should be minimal, since it will be powered on for hours at a time, and it could also be battery powered...

My first-year engineering group is designing an automatic shut off oven system. We will integrate smoke detector systems inside the oven. Details about that don't matter. Smoke detectors work on a trip wire type alarm. Alpha particles are emitted from a small source of Americium, the alpha...