demachina
Newbie level 2
Light/dark switch
Hello everyone,
I have a question that I (hope) is pretty basic. I'm working on a project where a small hydrogen fuel cell powers a small car motor. Everything is peachy, but I want to include a sensor to cut the circuit when light is no longer incident upon it.
What I tried before (unsucessfully) was having a photoresistor in series with the fuel cell and the motor. The fuel cell gives about 6-8 volts (on a good day). The problem was, even with as much light as I could get on the photoresistor, it added too much resistance (around 12ohms with light, 200 ohms without) to the circuit and was no longer able to move the motor.
So, what I was wondering is if there was a way to make a photoelectric switch thats externally powered. I'm not allowed to power the motor with anything but the fuel cell, but I can power any other component on this car with batteries if need be.
I feel like this is a really elementary question, but I am pretty uninitiated. If anyone could help me out, I'd appreciate it! I just want to know if this is possible, and if so, where to get the parts to make it happen.
Thanks!
Hello everyone,
I have a question that I (hope) is pretty basic. I'm working on a project where a small hydrogen fuel cell powers a small car motor. Everything is peachy, but I want to include a sensor to cut the circuit when light is no longer incident upon it.
What I tried before (unsucessfully) was having a photoresistor in series with the fuel cell and the motor. The fuel cell gives about 6-8 volts (on a good day). The problem was, even with as much light as I could get on the photoresistor, it added too much resistance (around 12ohms with light, 200 ohms without) to the circuit and was no longer able to move the motor.
So, what I was wondering is if there was a way to make a photoelectric switch thats externally powered. I'm not allowed to power the motor with anything but the fuel cell, but I can power any other component on this car with batteries if need be.
I feel like this is a really elementary question, but I am pretty uninitiated. If anyone could help me out, I'd appreciate it! I just want to know if this is possible, and if so, where to get the parts to make it happen.
Thanks!