Electronics newbie, so please bear with me... Thanks in advance!
I'm designing a control system for some solenoid-actuated hydraulic valves on my tractor to run a brush cutter. If you're not familiar, brush cutters can be pretty dangerous implements, so I want to reduce the likelihood of the brush cutter coming on unexpectedly as much as possible.
My design so far has a control activation switch and a brush cutter control switch. The brush cutter control switch doesn't work unless the control activation switch is closed, and the control activation switch must be OPEN in order for the tractor to start. The next issue I'm trying to solve for is where the operator pushes the control activation switch (to close it) thinking the brush cutter will be off, but turns it on because the brush cutter control switch (which is a latched switch) was left on.
I'm thinking this would be some kind of sensing device where, if it sensed a 0V to ~12V input from the control activation switch AND current getting past the brush cutter control switch, it would instantly interrupt the flow of electricity from the brush cutter control switch until it sensed 0 current. I suppose it would be sort of like what a GFCI does...?
What is such a device called? Or, if it's not a device, how do you do this? What's the circuit arrangement called? Just need something to go on so I can google and educate myself. This is a very simple, 12VDC vehicle electrical system.
Again, thanks!
I'm designing a control system for some solenoid-actuated hydraulic valves on my tractor to run a brush cutter. If you're not familiar, brush cutters can be pretty dangerous implements, so I want to reduce the likelihood of the brush cutter coming on unexpectedly as much as possible.
My design so far has a control activation switch and a brush cutter control switch. The brush cutter control switch doesn't work unless the control activation switch is closed, and the control activation switch must be OPEN in order for the tractor to start. The next issue I'm trying to solve for is where the operator pushes the control activation switch (to close it) thinking the brush cutter will be off, but turns it on because the brush cutter control switch (which is a latched switch) was left on.
I'm thinking this would be some kind of sensing device where, if it sensed a 0V to ~12V input from the control activation switch AND current getting past the brush cutter control switch, it would instantly interrupt the flow of electricity from the brush cutter control switch until it sensed 0 current. I suppose it would be sort of like what a GFCI does...?
What is such a device called? Or, if it's not a device, how do you do this? What's the circuit arrangement called? Just need something to go on so I can google and educate myself. This is a very simple, 12VDC vehicle electrical system.
Again, thanks!