Actions
Forum Thread Details
  • State Suggested Answer
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 286 subscribers
  • Views 1197 views
  • Users 0 members are here
Related

How can I automate circuit on/off based on a voltage threshold in another circuit?

scot_v

Hi,

 

I'm new to circuit design and I'm trying to figure out an easy way to automatically switch circuits on and off.  Ideally, I would like for the switch to happen when a certain voltage is reached across a battery that is recharging.  When the threshold voltage is reached I want to turn off a circuit and turn on another circuit.

 

There are actually three circuits involved so when circuit 1 is switched on, circuit 2 and 3 should be switched off. 

 

The ON and Off of the circuits will rotate like this:

 

circuit # 1 on switches 2 and 3 off 

circuit # 2 on switches 1 and 3 off,

circuit # 3 on switches 1 and 2 off

 

then repeat back to circuit # 1 on switches 2 and 3 off, etc., etc.

 

FYI, Each circuit will be running off its own 12V battery

 

I was trying to avoid using Arduino as that seems like it may take a while to learn.  I thought Mosfets as switches might work but not sure how to configure them.

 

Hope this makes sense. Any help would be greatly appreciated.

Thanks for your time.

Scot

Parents
  • 0

    This wouldn't be that hard to design and there are many ways to do this.

    1. An Arduino may be the easiest. The coding would be fairly simple. But the Arduino is for the control. You still need MOSFETS or BJT transistors with proper gate or base drive to do the actual switching. The details of how much current and voltage you're switching would need to be known to select the proper components.

    2. An FPGA would also be a good choice, but again, there is some programming. You need either an FPGA with analog comparators or use a quad comparator in front of the FPGA.

    3. Discrete gates and comparators would work as well, but there would be more breadboarding perhaps.

     

    Make a diagram with voltages and current loads and we can then talk specifics.

Reply
  • 0

    This wouldn't be that hard to design and there are many ways to do this.

    1. An Arduino may be the easiest. The coding would be fairly simple. But the Arduino is for the control. You still need MOSFETS or BJT transistors with proper gate or base drive to do the actual switching. The details of how much current and voltage you're switching would need to be known to select the proper components.

    2. An FPGA would also be a good choice, but again, there is some programming. You need either an FPGA with analog comparators or use a quad comparator in front of the FPGA.

    3. Discrete gates and comparators would work as well, but there would be more breadboarding perhaps.

     

    Make a diagram with voltages and current loads and we can then talk specifics.

Children
No Data